Earthquake with magnitude of Mw 3.9 on date 21-08-2017 and time 20:57:51 (Italy) in region 1 km SW Casamicciola Terme (NA)

A magnitude Mw 3.9 earthquake occured in region: 1 km SW Casamicciola Terme (NA), on

  • 21-08-2017 18:57:51 (UTC)
  • 21-08-2017 20:57:51 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 40.7380, 13.8980 at 2 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

Search earthquakes: Any within 30 km radius

The values of hypocentral coordinates and magnitude may be revised at a later time as more information becomes available.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Casamicciola Terme NA 1 8362 8362
Lacco Ameno NA 2 4853 13215
Serrara Fontana NA 3 3173 16388
Forio NA 3 17615 34003
Barano d'Ischia NA 3 10113 44116
Ischia NA 4 19915 64031
Procida NA 11 10530 74561
Monte di Procida NA 15 12886 87447
Bacoli NA 17 26560 114007

Municipalities with at least 50000 inhabitants

An earthquake occurred to
20 Km SW of Pozzuoli (81661 inhabitants)
31 Km SW of Marano di Napoli (59874 inhabitants)
32 Km W of Napoli (974074 inhabitants)
33 Km SW of Giugliano in Campania (122974 inhabitants)
37 Km SW of Aversa (53047 inhabitants)
38 Km SW of Casoria (77642 inhabitants)
39 Km W of Ercolano (53709 inhabitants)
40 Km W of Portici (55274 inhabitants)
40 Km W of Torre del Greco (86275 inhabitants)
40 Km SW of Afragola (65057 inhabitants)
46 Km SW of Acerra (59573 inhabitants)
49 Km W of Castellammare di Stabia (66466 inhabitants)
52 Km SW of Caserta (76326 inhabitants)
53 Km W of Scafati (50787 inhabitants)
68 Km W of Cava de' Tirreni (53659 inhabitants)
73 Km W of Salerno (135261 inhabitants)
78 Km W of Avellino (54857 inhabitants)
86 Km SW of Benevento (60091 inhabitants)
93 Km W of Battipaglia (50786 inhabitants)
Recent and historical seismicity

These maps show the seismic activity in different time intervals, before the seismic event to which they refer. Data reported in the first two maps come from the analysis carried out in real time by the personnel of the INGV Operating Rooms, immediately after each earthquake. The third map shows data from 1985 to the date of the earthquake: the locations are reviewed by the seismological analysts of the INGV Italian Seismic Bulletin (Bollettino Sismico Italiano dell’INGV). The localization parameters (hypocentral coordinates and magnitude) are the best possible estimate with the data available to the INGV, but are constantly updated according to further data that become available. The location and magnitude parameters, subsequently reviewed by seismological analysts, may vary.

Earthquakes of the 3 days preceding this event

Earthquakes of the 3 days preceding this event

This map shows the earthquake epicenters with magnitude ≥ 0.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, in the 72 hours preceding this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Earthquakes of the 90 days preceding this event

Earthquakes of the 90 days preceding this event

This map shows the earthquake epicenters with magnitude ≥ 2.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, in the 90 days preceding this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Earthquakes from 1985 to the date of the event

Earthquakes from 1985 to the date of the event

This map shows the earthquake epicenters with magnitude ≥ 3.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, from 1985 to the date of this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Earthquakes since 1000 AD until 2019

Earthquakes since 1000 AD until 2019

This map shows the epicenters of the historical earthquakes catalogue CPT15 (Catalogo Parametrico dei Terremoti Italiani, 2015 version 3.0, https://doi.org/10.13127/cpti/cpti15.3) since 1000 AD until 2019. The size of the square indicates the different classes of magnitude. For earthquakes with magnitude ≥ 6.0, it is also shown the year of occurrence and the magnitude value. The black and white star is the epicenter of the current earthquake.
Seismic hazard

Seismic hazard maps provide probabilistic estimates of the earthquake ground shaking exceeding a given threshold in a given geographic region within a given time window. Thus, it is not a deterministic prediction - a target that may be never reached given the complexity of the earthquake physical phenomenon - nor of the maximum expected earthquake since this has extremely low probabilities to occur.

In 2004, it was published the seismic hazard map of Italy (http://zonesismiche.mi.ingv.it) that provides a picture of the most hazardous geographic regions. The seismic hazard map of Italy (GdL MPS, 2004; rif. Ordinanza PCM del 28 aprile 2006, n. 3519, All. 1b) provides the 10% probability of exceedance in 50 years of the horizontal acceleration at rock sites (i.e., Vs30>800 m/s; cat. A, 3.2.1 of the D.M. 14.09.2005).

The colours indicate the various values of the ground acceleration that have 10% to be exceeded within 50 years. In general, the colours associated to low values of acceleration refer to areas that are less hazardous and stronger earthquakes repeat less frequently although they may still occur.

Seismic hazard map

Seismic hazard map

This map shows the seismic hazard map of Italy for the region where the earthquake occurred.
Shakemap

These three maps show the results of the analysis using the software ShakeMap designed to provide the level of ground shaking experienced in a region using the data recorded by seismometers and strong motion instruments and seismological information regarding the attenuation of the wavefield with distance and the site characteristics. The Shakemaps are determined for research purposes to provide fast estimates of the level of ground shaking produced by the earthquake. The maps are calculated automatically and updated as more data become available. See http://shakemap.ingv.it for additional information. The black star indicates the epicenter. The triangles show the accelerometric and velocimetric stations used in the calculation, colored according to the recorded shaking.

Intensity Shakemap

Intensity Shakemap

This map shows the distribution of instrumental intensities. The intensity is derived through an empirical law that correlates the recorded values of actual ground shaking, e.g., acceleration and velocity, with the macroseismic intensity for Italian earthquakes, as reported in the Italian Macroseismic Database (DBMI15, https://doi.org/10.13127/cpti/cpti15.3).
Peak ground acceleration Shakemap

Peak ground acceleration Shakemap

This map shows the distribution of peak ground acceleration expressed as percent of the acceleration of gravity (i.e., g = 9.81 m/s²).
Peak velocity Shakemap

Peak velocity Shakemap

This map shows the distribution of peak ground velocities expressed in cm/s.
Felt maps
Preliminary map of the earthquake effects from the web questionnaire

Preliminary map of the earthquake effects from the web questionnaire

This map shows the distribution of earthquake resentment in the area, expressed in terms of intensity on the MCS scale (Mercalli-Cancani-Sieberg). Intensities are determined using data from questionnaires collected on the website http://www.hsit.it. The intensities shown are determined considering all the reports received from each municipality, and are all the more reliable the greater the number of questionnaires. The collected data are subjected to an automatic statistical filter, but are not checked individually. In particular, intensities greater than or equal to the VI degree of the MCS or EMS scale require on-site verification by specialized personnel. The black star is the epicenter of the earthquake that occurred. This map is updated every time citizens fill out new questionnaires. The number of questionnaires processed to obtain this map, the date and time of the last update are shown at the top right.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Bulletin
Rev1000
ML 3.6 2017-08-21
18:57:51
40.7383 13.8977 2 2017-12-05
11:13:27
Bollettino Sismico Italiano INGV 49268411
Reviewed Evaluation Mw
Rev501
Mw 3.9 2017-08-21
18:57:51
40.739 13.903 3 2017-10-17
14:08:40
TDMT-INGV Revised 51070861
Reviewed
Rev200
Md 4.0 2017-08-21
18:57:51
40.739 13.903 2 2017-08-29
12:19:17
Sala Operativa INGV-OV (Napoli) 49478641
Reviewed
Rev200
Md 4.0 2017-08-21
18:57:51
40.739 13.903 2 2017-08-25
12:51:54
Sala Operativa INGV-OV (Napoli) 49355471
Reviewed
Rev200
Md 4.0 2017-08-21
18:57:51
40.783 13.883 5 2017-08-21
22:16:47
Sala Operativa INGV-OV (Napoli) 49256941
Reviewed
Rev100
ML 3.6 2017-08-21
18:57:51
40.7127 13.8413 10 2017-08-21
19:23:06
Sala Sismica INGV-Roma 49252001
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2017-08-21 18:57:51 ± 0.02
Latitude 40.7383 ± 0.0018
Longitude 13.8977 ± 0.0024
Depth (km) 2 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 49268411

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 220
Semi-minor axis of confidence ellipse (meter) 110
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 316
Circular confidence region, given by single value of horizontal uncertainty (meter) 220.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 83
Number of associated phases, regardless of their use for origin computation 102
Number of defining phases 102
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.04
Epicentral distance of station closest to the epicenter (degree) 0.00809
Epicentral distance of station farthest from the epicenter (degree) 3.67013
Number of stations at which the event was observed 101
Number of stations from which data was used for origin computation 101
Magnitudes information

Mw:3.9

Field Value
Value 3.9
Uncertainty
Num. used stations
Type of magnitude Mw
Reference to an origin 51070861
Agency INGV
Autore TDMT-INGV Revised
Time of creation (UTC) 2017-10-17 14:08:40

ML:3.6

Field Value
Value 3.6
Uncertainty 0.2
Num. used stations 129
Type of magnitude ML
Reference to an origin 49252001
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2017-08-21 19:23:05

ML:3.6

Field Value
Value 3.6
Uncertainty 0.2
Num. used stations 121
Type of magnitude ML
Reference to an origin 49268411
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2017-11-30 14:42:36

Md:4.0

Field Value
Value 4.0
Uncertainty 0.0
Num. used stations
Type of magnitude Md
Reference to an origin 49355471
Agency INGV
Autore Sala Operativa INGV-OV (Napoli)
Time of creation (UTC) 2017-08-25 12:51:54

Md:4.0

Field Value
Value 4.0
Uncertainty 0.0
Num. used stations
Type of magnitude Md
Reference to an origin 49256941
Agency INGV
Autore Sala Operativa INGV-OV (Napoli)
Time of creation (UTC) 2017-08-21 22:16:47

Md:4.0

Field Value
Value 4.0
Uncertainty 0.3
Num. used stations
Type of magnitude Md
Reference to an origin 49478641
Agency INGV
Autore Sala Operativa INGV-OV (Napoli)
Time of creation (UTC) 2017-08-29 12:19:17
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
MN.VSL.HHN. 2017-08-21T18:58:46.40 0.3 undecidable manual P 252 407.3811 31 -2.45 0
IV.AGLI.HHZ. 2017-08-21T18:58:45.90 0.3 undecidable manual P 278 398.2014 31 -1.83 0
IV.SOI.EHN. 2017-08-21T18:58:44.25 0.6 undecidable manual P 147 348.6843 31 2.57 0
IV.DGI.HHZ. 2017-08-21T18:58:40.44 0.3 undecidable manual P 264 364.7571 31 -3.2 0
IV.PLAC.HHE. 2017-08-21T18:58:40.03 0.3 undecidable manual P 139 334.11 31 0.13 0
IV.LADO.EHE. 2017-08-21T18:58:38.16 0.3 undecidable manual P 121 307.5588 31 1.5 0
MN.TIP.HHN. 2017-08-21T18:58:36.30 0.3 undecidable manual P 125 298.479 31 0.76 0
IV.SERS.HNN. 2017-08-21T18:58:35.89 0.3 undecidable manual P 128 303.4629 31 -0.26 0
IV.PIPA.HHZ. 2017-08-21T18:58:34.69 0.3 undecidable manual P 118 283.9047 31 0.92 0
IV.JOPP.HNN. 2017-08-21T18:58:33.15 0.3 undecidable manual P 144 291.0864 31 -1.49 0
IV.CSP1.EHZ. 2017-08-21T18:58:32.26 0.3 undecidable manual P 348 267.2325 31 0.53 0
IV.CELI.HHZ. 2017-08-21T18:58:30.77 0.3 undecidable manual P 123 266.6331 31 -0.88 0
IV.NOCI.HHN. 2017-08-21T18:58:30.50 0.3 undecidable manual P 88 266.1336 31 -1.09 0
IV.CAR1.HHN. 2017-08-21T18:58:29.30 0.6 undecidable manual P 129 256.5543 31 -1.12 0
IV.TDS.HHZ. 2017-08-21T18:58:28.50 0.3 undecidable manual P 119 238.8831 31 0.24 0
IV.CRAC.EHN. 2017-08-21T18:58:27.45 0.6 undecidable manual P 100 217.5156 31 1.8 0
GE.MATE.HHN. 2017-08-21T18:58:27.23 0.3 undecidable manual P 91 236.2857 31 -0.72 0
IV.SALB.HHZ. 2017-08-21T18:58:26.83 0.3 undecidable manual P 114 228.105 31 -0.12 0
IV.AMUR.HHZ. 2017-08-21T18:58:26.16 0.3 undecidable manual P 84 228.0051 31 -0.77 0
IV.CET2.HHZ. 2017-08-21T18:58:24.79 0.3 undecidable manual P 127 220.113 31 -1.18 0
IV.TOLF.HHN. 2017-08-21T18:58:23.53 0.3 undecidable manual P 314 215.7174 31 -1.91 0
IV.RM33.HNE. 2017-08-21T18:58:23.32 0.3 undecidable manual P 344 204.4398 31 -0.73 0
IV.CAMP.HHE. 2017-08-21T18:58:23.23 0.3 undecidable manual P 349 203.4408 31 -0.71 0
IV.MMN.HHZ. 2017-08-21T18:58:23.59 0.3 positive manual P 117 200.4438 31 0.03 0
IV.GIGS.HHN. 2017-08-21T18:58:22.85 0.6 undecidable manual P 352 192.1632 31 0.3 0
IV.MRVN.HHZ. 2017-08-21T18:58:21.72 0.3 undecidable manual P 79 195.9594 31 -1.3 0
IV.VCEL.EHN. 2017-08-21T18:58:21.11 0.6 undecidable manual P 359 183.7827 31 -0.42 0
IV.FIAM.HNN. 2017-08-21T18:58:20.32 0.3 undecidable manual P 339 181.6848 31 -0.95 0
IV.SGRT.HHZ. 2017-08-21T18:58:20.87 0.3 undecidable manual P 53 190.8645 31 -1.53 0
IV.PALZ.HHZ. 2017-08-21T18:58:19.81 0.3 undecidable manual P 82 174.5919 35 -0.55 0
MN.CUC.HHE. 2017-08-21T18:58:19.68 0.3 undecidable manual P 116 181.8846 31 -1.63 0
IV.SIRI.HNE. 2017-08-21T18:58:19.51 0.3 undecidable manual P 110 177.3891 35 -1.22 0
IV.ACER.HHZ. 2017-08-21T18:58:19.23 0.3 undecidable manual P 88 171.8946 35 -0.77 0
IV.APRC.HHN. 2017-08-21T18:58:19.94 0.3 undecidable manual P 50 177.7887 35 -0.85 0
IV.MCEL.HHZ. 2017-08-21T18:58:18.09 0.6 undecidable manual P 105 167.0106 35 -1.24 0
IV.MTSN.HHZ. 2017-08-21T18:58:18.06 0.3 undecidable manual P 108 164.9127 35 -0.99 0
BA.PZUN.HNZ. 2017-08-21T18:58:18.87 0.3 undecidable manual P 93 160.9167 35 0.35 0
IV.MTCE.HHZ. 2017-08-21T18:58:17.57 0.6 undecidable manual P 326 171.8946 35 -2.43 0
IV.T0110.HHZ. 2017-08-21T18:58:17.90 0.3 undecidable manual P 357 165.7119 35 -1.26 0
IV.MGR.HHZ. 2017-08-21T18:58:16.24 0.3 undecidable manual P 115 154.9227 35 -1.47 0
IV.SLCN.HNZ. 2017-08-21T18:58:16.99 0.3 undecidable manual P 104 151.2375 35 -0.23 0
IV.BULG.HHN. 2017-08-21T18:58:15.69 0.6 undecidable manual P 120 144.8439 35 -0.68 0
IV.RDP.HHZ. 2017-08-21T18:58:15.00 0.3 undecidable manual P 319 150.5382 35 -2.12 0
IV.MELA.HHZ. 2017-08-21T18:58:15.57 0.6 undecidable manual P 43 148.4403 35 -1.27 0
IV.VULT.HHN. 2017-08-21T18:58:15.73 0.3 undecidable manual P 80 146.2425 35 -0.81 0
IV.RMP.HHN. 2017-08-21T18:58:15.69 0.6 undecidable manual P 320 155.2224 35 -2.07 0
IV.CERT.HHZ. 2017-08-21T18:58:15.37 0.1 negative manual P 331 154.4343 35 -2.28 0
IV.VIVA.HHN. 2017-08-21T18:58:14.69 0.6 undecidable manual P 320 146.4423 35 -1.88 0
IV.RCAV.EHZ. 2017-08-21T18:58:14.58 0.6 undecidable manual P 327 146.4423 35 -1.99 0
IV.INTR.HHZ. 2017-08-21T18:58:14.09 0.1 negative manual P 0 141.2475 35 -1.78 0
IV.SGTA.HHZ. 2017-08-21T18:58:13.97 0.1 negative manual P 70 130.5693 35 -0.47 0
IV.TRIV.HHZ. 2017-08-21T18:58:13.44 0.1 negative manual P 25 126.3735 35 -0.44 0
IV.MOCO.HNE. 2017-08-21T18:58:13.58 0.3 undecidable manual P 56 126.5733 35 -0.32 0
IV.CIGN.HHN. 2017-08-21T18:58:13.85 1.0 undecidable manual P 39 131.868 35 -0.76 0
IV.GUAR.HHN. 2017-08-21T18:58:12.10 0.1 negative manual P 338 126.873 35 -1.85 0
IV.BIOG.HHZ. 2017-08-21T18:58:12.75 0.3 undecidable manual P 63 115.3956 35 0.35 0
IV.CMPR.HHZ. 2017-08-21T18:58:12.14 0.3 undecidable manual P 111 127.3725 35 -1.86 0
IV.GATE.HNN. 2017-08-21T18:58:12.90 0.1 negative manual P 44 120.5904 35 -0.2 0
IV.VVLD.HHZ. 2017-08-21T18:58:12.39 0.1 negative manual P 350 127.5723 35 -1.64 0
IX.RSF3.HHZ.02 2017-08-21T18:58:11.43 0.3 positive manual P 76 110.112 43 -0.26 0
IV.CAFE.HHZ. 2017-08-21T18:58:11.71 0.1 negative manual P 74 116.7942 35 -0.88 0
IV.CDRU.HHE. 2017-08-21T18:58:11.55 0.3 undecidable manual P 103 121.6893 35 -1.69 0
IV.POFI.HHZ. 2017-08-21T18:58:10.33 0.1 negative manual P 352 109.7124 43 -1.29 0
IV.BSSO.HHZ. 2017-08-21T18:58:10.52 0.1 negative manual P 33 106.8153 43 -0.63 0
IV.SNAL.HHZ. 2017-08-21T18:58:10.82 0.1 negative manual P 79 111.999 35 -1.12 0
IV.RNI2.HHZ. 2017-08-21T18:58:10.38 0.1 negative manual P 11 109.113 43 -1.14 0
IV.LATB.EHZ. 2017-08-21T18:58:09.52 0.3 undecidable manual P 317 114.5964 35 -2.77 0
IV.SACR.HHZ. 2017-08-21T18:58:09.36 0.1 negative manual P 42 99.5226 43 -0.62 0
IV.MCRV.HHN. 2017-08-21T18:58:09.76 0.3 undecidable manual P 87 106.9152 43 -1.41 0
IV.MRB1.HHZ. 2017-08-21T18:58:09.32 0.3 undecidable manual P 64 99.3228 43 -0.62 0
IV.MIDA.HHZ. 2017-08-21T18:58:09.79 0.1 negative manual P 16 104.5176 43 -1 0
IV.CERA.HHZ. 2017-08-21T18:58:08.40 0.1 negative manual P 6 95.8263 43 -0.99 0
IV.PSB1.HHZ. 2017-08-21T18:58:08.21 0.1 negative manual P 55 93.5397 43 -0.79 0
IV.LRP.EHZ. 2017-08-21T18:58:08.48 0.3 undecidable manual P 346 104.118 43 -2.24 0
IV.MTMR.EHZ. 2017-08-21T18:58:07.94 0.1 undecidable manual P 77 94.8384 43 -1.29 0
IV.MCI.EHZ. 2017-08-21T18:58:06.29 0.3 undecidable manual P 355 83.7495 43 -1.14 0
IV.LIK.EHZ.01 2017-08-21T18:58:06.70 0.3 undecidable manual P 342 89.0442 43 -1.58 0
IV.SGG.HHZ. 2017-08-21T18:58:06.41 0.1 negative manual P 29 82.4508 43 -0.81 0
IV.VITU.HHZ. 2017-08-21T18:58:05.61 0.3 undecidable manual P 51 78.7656 43 -1.01 0
IV.VAGA.HHZ. 2017-08-21T18:58:05.97 0.1 negative manual P 20 80.1642 43 -0.88 0
IV.PAOL.HHZ. 2017-08-21T18:58:03.37 0.1 negative manual P 60 64.8906 49 -0.99 0
IV.PIGN.HHZ. 2017-08-21T18:58:01.74 0.1 negative manual P 25 56.3991 49 -1.1 0
IV.VCRE.HHZ. 2017-08-21T18:58:00.35 0.3 undecidable manual P 79 45.7209 49 -0.58 0
IV.OVO.HHZ. 2017-08-21T18:58:00.07 0.1 negative manual P 77 43.0236 49 -0.38 0
IV.VBKN.HHN. 2017-08-21T18:58:00.39 0.3 undecidable manual P 77 45.8208 49 -0.56 0
IV.CRTO.HHE. 2017-08-21T18:58:00.28 0.6 undecidable manual P 78 45.0216 49 -0.52 0
IV.MODR.HHZ. 2017-08-21T18:58:00.08 0.1 negative manual P 358 45.2214 49 -0.76 0
IV.VTIR.HHZ. 2017-08-21T18:58:00.45 0.3 undecidable manual P 80 44.8218 49 -0.32 0
IV.VVDG.HHE. 2017-08-21T18:58:00.26 0.3 undecidable manual P 76 45.5211 49 -0.63 0
IV.VENT.EHZ. 2017-08-21T18:57:59.04 0.1 negative manual P 279 40.5261 49 -0.95 0
IV.CSOB.HHZ. 2017-08-21T18:57:57.04 0.1 negative manual P 64 22.9548 49 0.18 41
IV.CPIS.HHZ. 2017-08-21T18:57:57.19 0.3 undecidable manual P 64 23.2545 49 0.28 28
IV.CSFT.HHZ. 2017-08-21T18:57:57.04 0.1 negative manual P 64 22.6551 49 0.23 43
IV.CMSN.HHZ. 2017-08-21T18:57:57.75 0.1 negative manual P 65 26.3514 49 0.29 11
IV.COLB.HHZ. 2017-08-21T18:57:56.92 0.1 negative manual P 67 22.755 49 0.09 44
IV.CPOZ.HHZ. 2017-08-21T18:57:56.59 0.1 negative manual P 64 20.6682 49 0.14 65
IV.CFMN.HHZ. 2017-08-21T18:57:56.32 0.1 negative manual P 57 19.4694 49 0.08 77
IV.CAFL.HHZ. 2017-08-21T18:57:56.42 0.1 negative manual P 55 20.1687 49 0.06 70
IV.IFOR.HHZ. 2017-08-21T18:57:53.19 0.1 positive manual P 230 4.6953 97 -0.1 100
IV.ICAI.EHZ. 2017-08-21T18:57:53.35 0.1 positive manual P 98 5.7942 96 -0.19 95
IV.IOCA.HHZ. 2017-08-21T18:57:52.28 0.1 undecidable manual P 18 0.8991 136 -0.17 96
IV.IOCA.HHZ. 2017-08-21T18:57:52.80 0.3 undecidable manual S 18 0.8991 136 -0.17 72
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MODR.HHN. ML:3.5 0.010012681499999999 0.3328 AML other m 2017-08-21T18:58:08.86
IV.VENT.EHE. ML:3.3 0.0078845545 0.9344 AML other m 2017-08-21T18:58:09.77
IV.MODR.HHE. ML:3.4 0.008057562499999999 1.1136 AML other m 2017-08-21T18:58:10.46
IV.VENT.EHN. ML:3.2 0.005777483 0.5248 AML other m 2017-08-21T18:58:14.60
IV.VTIR.HHN. ML:3.1 0.0036029555000000003 0.6016 AML other m 2017-08-21T18:58:16.42
IV.PIGN.HNN. ML:3.3 0.0050948325 0.6272 AML other m 2017-08-21T18:58:19.66
IV.PIGN.HHN. ML:3.3 0.0052683915 0.6528 AML other m 2017-08-21T18:58:19.66
IV.VTIR.HHE. ML:3.1 0.004096462499999999 0.8704 AML other m 2017-08-21T18:58:19.83
IV.PAOL.HHN. ML:3.5 0.0065385404999999995 1.0112 AML other m 2017-08-21T18:58:20.48
IV.PAOL.HNN. ML:3.5 0.0061919445 0.9984 AML other m 2017-08-21T18:58:20.49
IV.PIGN.HNE. ML:3.4 0.006386010499999999 0.6912 AML other m 2017-08-21T18:58:20.63
IV.PIGN.HHE. ML:3.4 0.005889999999999999 0.7 AML other m 2017-08-21T18:58:20.64
IV.VITU.HNN. ML:3.9 0.0106677125 0.8192 AML other m 2017-08-21T18:58:22.05
IV.VITU.HHN. ML:3.9 0.010991440000000002 0.8192 AML other m 2017-08-21T18:58:22.05
IV.PAOL.HHE. ML:3.3 0.003996766499999999 0.9472 AML other m 2017-08-21T18:58:22.12
IV.PAOL.HNE. ML:3.3 0.0038654685 0.9344 AML other m 2017-08-21T18:58:22.12
IV.VITU.HNE. ML:3.2 0.0021176625 1.0752 AML other m 2017-08-21T18:58:22.28
IV.MCI.EHE. ML:3.6 0.005858304000000001 0.64 AML other m 2017-08-21T18:58:23.43
IV.MCI.EHN. ML:3.7 0.0067800375 0.9216 AML other m 2017-08-21T18:58:23.51
IV.VAGA.HNN. ML:3.8 0.008110362999999999 0.96 AML other m 2017-08-21T18:58:24.51
IV.VAGA.HHN. ML:3.8 0.008462377499999998 0.96 AML other m 2017-08-21T18:58:24.51
IV.VITU.HHE. ML:3.6 0.0057527575 0.7168 AML other m 2017-08-21T18:58:26.68
IV.SGG.HHE. ML:3.6 0.005577051 0.7424 AML other m 2017-08-21T18:58:27.39
IV.VAGA.HHE. ML:3.6 0.0061557785 1.216 AML other m 2017-08-21T18:58:27.94
IV.VAGA.HNE. ML:3.6 0.0059518655 1.216 AML other m 2017-08-21T18:58:27.95
IV.LIK.EHE.01 ML:4.0 0.010941359999999999 0.9216 AML other m 2017-08-21T18:58:28.01
IV.PSB1.HHN. ML:3.6 0.00467625 1.8304 AML other m 2017-08-21T18:58:28.51
IV.PSB1.HNN. ML:3.6 0.0045687144999999995 1.8432 AML other m 2017-08-21T18:58:28.51
IV.LIK.EHN.01 ML:4.1 0.014181685000000001 0.9216 AML other m 2017-08-21T18:58:28.60
IV.MTMR.HNN. ML:3.5 0.0034742490000000004 1.0624 AML other m 2017-08-21T18:58:29.08
IV.MTMR.EHN. ML:3.8 0.0069911504999999995 1.0624 AML other m 2017-08-21T18:58:29.08
IV.SACR.HNN. ML:3.6 0.0038582444999999996 2.0608 AML other m 2017-08-21T18:58:30.88
IV.MRB1.HHN. ML:3.8 0.006990114500000001 0.7424 AML other m 2017-08-21T18:58:29.90
IV.MTMR.HNE. ML:3.6 0.0044077765 1.088 AML other m 2017-08-21T18:58:30.69
IV.MTMR.EHE. ML:3.9 0.008874795 1.1008 AML other m 2017-08-21T18:58:30.68
IV.SGG.HHN. ML:3.6 0.004852941 0.6144 AML other m 2017-08-21T18:58:31.28
IV.CERA.HHE. ML:3.9 0.008258531500000001 0.9472 AML other m 2017-08-21T18:58:31.16
IV.CERA.HNE. ML:3.8 0.0079570895 0.9472 AML other m 2017-08-21T18:58:31.16
IV.MRB1.HNN. ML:3.8 0.0066751895 0.9472 AML other m 2017-08-21T18:58:32.54
IV.LRP.EHE. ML:3.3 0.0020099065 0.8576 AML other m 2017-08-21T18:58:33.18
IV.LATB.EHN. ML:2.8 0.00047617625 1.7152 AML other m 2017-08-21T18:58:33.49
IV.SACR.HNE. ML:3.6 0.003923042 1.3952 AML other m 2017-08-21T18:58:35.06
IV.CAFE.HNN. ML:3.5 0.002468242 1.2928 AML other m 2017-08-21T18:58:34.98
IV.CAFE.HHN. ML:3.5 0.0025655605000000003 1.344 AML other m 2017-08-21T18:58:34.98
IV.SACR.HHN. ML:3.6 0.004092524 1.4976 AML other m 2017-08-21T18:58:35.08
IV.POFI.HNE. ML:3.5 0.0025410190000000003 1.7536 AML other m 2017-08-21T18:58:35.06
IV.PSB1.HHE. ML:3.7 0.0050971754999999995 1.8304 AML other m 2017-08-21T18:58:36.23
IV.PSB1.HNE. ML:3.6 0.004945161000000001 1.856 AML other m 2017-08-21T18:58:36.22
IV.MIDA.HHN. ML:3.5 0.0030017525 1.0112 AML other m 2017-08-21T18:58:37.83
IV.BSSO.HHN. ML:3.4 0.0022253825000000003 2.048 AML other m 2017-08-21T18:58:38.11
IV.BSSO.HNN. ML:3.8 0.0055797445 2.0736 AML other m 2017-08-21T18:58:38.12
IV.SGTA.HHE. ML:3.4 0.0016275395 0.8576 AML other m 2017-08-21T18:58:38.12
IV.SGTA.HNE. ML:3.4 0.001608689 0.8576 AML other m 2017-08-21T18:58:38.14
IV.CERA.HHN. ML:3.7 0.0059467535 0.9088 AML other m 2017-08-21T18:58:37.80
IV.CERA.HNN. ML:3.7 0.0056689445 0.896 AML other m 2017-08-21T18:58:37.82
IV.LRP.EHN. ML:3.5 0.003046427 1.2288 AML other m 2017-08-21T18:58:38.94
IV.MRB1.HNE. ML:3.9 0.008095535999999999 1.6896 AML other m 2017-08-21T18:58:39.10
IV.AMUR.HHE. ML:3.2 0.0003428711 1.3824 AML other m 2017-08-21T18:58:40.02
IV.VVLD.HHE. ML:3.5 0.0021010795 1.0112 AML other m 2017-08-21T18:58:41.00
IV.VVLD.HHN. ML:3.5 0.0023449369999999996 0.8704 AML other m 2017-08-21T18:58:42.12
IV.TRIV.HHN. ML:3.6 0.0026128040000000003 1.1776 AML other m 2017-08-21T18:58:41.73
IV.TRIV.HNN. ML:3.5 0.0024121175 1.1776 AML other m 2017-08-21T18:58:41.74
IV.SACR.HHE. ML:3.6 0.004040611 1.4848 AML other m 2017-08-21T18:58:42.95
IV.LATB.EHE. ML:3.0 0.00084367285 1.5232 AML other m 2017-08-21T18:58:43.11
IV.MELA.HHN. ML:3.6 0.0022365085 0.832 AML other m 2017-08-21T18:58:43.80
IV.MELA.HNN. ML:3.6 0.0021601819999999996 0.8448 AML other m 2017-08-21T18:58:43.81
IV.CERT.HHN. ML:3.2 0.0007404119 0.9984 AML other m 2017-08-21T18:58:44.77
IV.MRB1.HHE. ML:3.9 0.008522916500000002 1.0496 AML other m 2017-08-21T18:58:45.06
IV.POFI.HHE. ML:3.5 0.0030101079999999996 2.6496 AML other m 2017-08-21T18:58:46.81
IV.POFI.HHN. ML:3.5 0.0029386064999999996 2.1376 AML other m 2017-08-21T18:58:46.60
IV.POFI.HNN. ML:3.6 0.0030530315 2.1632 AML other m 2017-08-21T18:58:45.55
IV.MIDA.HHE. ML:3.7 0.004453579 1.1776 AML other m 2017-08-21T18:58:46.00
IV.MIDA.HNE. ML:3.6 0.004092722 1.1776 AML other m 2017-08-21T18:58:46.00
IV.MIDA.HNN. ML:3.5 0.0030728615000000003 1.5616 AML other m 2017-08-21T18:58:46.68
IV.RNI2.HNE. ML:3.6 0.0036748135 1.344 AML other m 2017-08-21T18:58:47.67
IV.RNI2.HHE. ML:3.6 0.0038100589999999998 1.344 AML other m 2017-08-21T18:58:47.67
IV.INTR.HHN. ML:3.8 0.0039984545 0.9344 AML other m 2017-08-21T18:58:46.60
IV.INTR.HNN. ML:0.9 0.0000026751819999999997 0.96 AML other m 2017-08-21T18:58:46.60
IV.SNAL.HHN. ML:4.2 0.01217915 1.6384 AML other m 2017-08-21T18:58:47.74
IV.SNAL.HNN. ML:4.1 0.011809675 1.6384 AML other m 2017-08-21T18:58:47.75
IV.SGTA.HNN. ML:3.5 0.0019802295 1.1392 AML other m 2017-08-21T18:58:48.36
IV.SGTA.HHN. ML:3.5 0.001958474 1.2032 AML other m 2017-08-21T18:58:48.36
IV.RNI2.HHN. ML:3.7 0.0043061125000000006 2.4448 AML other m 2017-08-21T18:58:49.75
IV.RNI2.HNN. ML:3.7 0.004182008 2.432 AML other m 2017-08-21T18:58:49.76
IV.MELA.HHE. ML:3.7 0.002508687 0.8448 AML other m 2017-08-21T18:58:48.67
IV.MELA.HNE. ML:3.7 0.002434685 0.8576 AML other m 2017-08-21T18:58:48.68
IV.BSSO.HHE. ML:3.4 0.0020075665000000003 1.2032 AML other m 2017-08-21T18:58:48.11
IV.BSSO.HNE. ML:3.7 0.0047869395 1.216 AML other m 2017-08-21T18:58:48.13
IV.TRIV.HNE. ML:3.6 0.0025570274999999996 2.0992 AML other m 2017-08-21T18:58:48.97
IV.TRIV.HHE. ML:3.6 0.002605326 2.0992 AML other m 2017-08-21T18:58:48.97
IV.CERT.HHE. ML:3.5 0.00142134985 1.0368 AML other m 2017-08-21T18:58:49.79
IV.CAFE.HHE. ML:3.6 0.0029018959999999997 1.5744 AML other m 2017-08-21T18:58:50.18
IV.CAFE.HNE. ML:3.6 0.0028352455000000003 1.728 AML other m 2017-08-21T18:58:50.18
IV.SNAL.HHE. ML:4.0 0.008497078500000001 1.6896 AML other m 2017-08-21T18:58:50.34
IV.SNAL.HNE. ML:4.0 0.007942703 1.7024 AML other m 2017-08-21T18:58:50.36
IV.MTSN.HHN. ML:3.5 0.0013752945 1.088 AML other m 2017-08-21T18:58:51.41
IV.MCEL.HHN. ML:3.6 0.0016099999999999999 0.64 AML other m 2017-08-21T18:58:55.52
IV.MCEL.HNN. ML:3.6 0.0015550000000000002 0.66 AML other m 2017-08-21T18:58:55.53
IV.ACER.HNN. ML:3.5 0.0013965165000000002 1.1264 AML other m 2017-08-21T18:58:55.90
IV.ACER.HHN. ML:3.6 0.0015213065000000002 1.1008 AML other m 2017-08-21T18:58:55.90
IV.INTR.HHE. ML:3.5 0.001901249 1.5104 AML other m 2017-08-21T18:58:56.86
IV.MCEL.HHE. ML:3.4 0.0011809536 1.6 AML other m 2017-08-21T18:58:56.61
IV.MCEL.HNE. ML:3.4 0.0011716589 1.6 AML other m 2017-08-21T18:58:56.61
IV.SGRT.HHN. ML:3.4 0.0009409796500000001 1.1392 AML other m 2017-08-21T18:58:59.41
IV.T0110.HHN. ML:3.7 0.0019529830000000001 1.3568 AML other m 2017-08-21T18:58:59.50
IV.SGRT.HHE. ML:3.5 0.00099921975 1.28 AML other m 2017-08-21T18:59:00.20
IV.MMN.HHN. ML:3.4 0.0008473048 0.8576 AML other m 2017-08-21T18:59:00.90
IV.T0110.HHE. ML:3.6 0.0016930985 1.8048 AML other m 2017-08-21T18:59:02.04
IV.CET2.HHN. ML:4.1 0.002958364 0.9216 AML other m 2017-08-21T18:59:01.43
IV.CET2.HHE. ML:4.0 0.002471982 0.96 AML other m 2017-08-21T18:59:02.41
IV.ACER.HHE. ML:3.6 0.0014652055 2.1248 AML other m 2017-08-21T18:59:03.21
IV.ACER.HNE. ML:3.5 0.0013989685 2.0864 AML other m 2017-08-21T18:59:03.21
IV.MTSN.HHE. ML:3.5 0.0014692025000000001 1.4336 AML other m 2017-08-21T18:59:04.51
IV.PALZ.HHE. ML:3.9 0.0032480440000000003 1.6768 AML other m 2017-08-21T18:59:06.31
IV.PALZ.HHN. ML:3.9 0.0033573265 2.24 AML other m 2017-08-21T18:59:11.70
IV.MMN.HHE. ML:3.1 0.00040962955000000003 0.96 AML other m 2017-08-21T18:59:12.69
IV.CELI.HHE. ML:4.0 0.0016889275000000002 1.2672 AML other m 2017-08-21T18:59:16.02
IV.CELI.HNE. ML:3.6 0.0006793131999999999 1.2672 AML other m 2017-08-21T18:59:15.39
IV.AMUR.HHN. ML:3.4 0.000558385 1.3952 AML other m 2017-08-21T18:59:22.05
IV.CELI.HNN. ML:3.5 0.00047908675 1.2288 AML other m 2017-08-21T18:59:25.00
IV.CELI.HHN. ML:3.8 0.00118100165 1.216 AML other m 2017-08-21T18:59:25.02
TDMT - Time Domain Moment Tensor

TDMT details

Field Value
Magnitude3.9
Scalar Moment7.32466E+21 dyne-cm
Computed depth3 km
QualityCa
Variance Reduction18.07%
Double Couple88%
CLVD12%
ISO0%
Model usedCIA
Modemanual
Statusreviewed

Moment Tensor Components

Component Value
Mrr-2.9378E+21
Mtt-2.7482E+21
Mpp5.686E+21
Mrt-3.7904E+21
Mrp-5.009E+20
Mtp3.8624E+21

Nodal Planes

Name Strike Dip Rake
PN15971-39
PN216354-156

Fault Plane solution

Focal Mechanism

psmeca (GMT documentation)

13.903 40.739 3 59 71 -39 163 54 -156 7.32466 21 14.403 41.239

TDMT references

More info and references

Station Distribution

Station Distribution

TDMT station details

Sta Dist Azi V R zcor
MODR 45.2 357.3 27.41% 106
MOCO 126.7 56 30.75% 126
PIGN 56.3 24.4 12.63% 97
VAGA 80.1 20.2 12.5% 100
RNI2 109.1 11 12.2% 114
LPEL 147.1 9.1 21.51% 120
CERA 95.9 5.8 14.57% 113
OVO 42.8 76.6 3.72% 99
PAOL 0 59.7 -5.06% 111
AQU 184.1 347.1 17.69% 111
POFI 109.8 351.7 9.56% 103
Fault Plane solutions in the area
Fault Plane solutions

Fault Plane solutions

The map reports the fault plane solutions for earthquakes in the region from 1977 to the date of this event. Red moment tensors are determined using the Regional Centroid Moment Tensor technique (RCMT, http://www.bo.ingv.it/RCMT) applied for earthquakes with magnitude larger than 4.5 in the Euro-Mediterranenan area. Occasionally, when a station azimuthal coverage exists RCMTs can be obtained also for earthquakes with magnitude down to 4.0. The gray moment tensors are obtained with the Time Domain Moment Tensor method (TDMT, /tdmt). This technique is applied to earthquakes with magnitude ML greater than 3.2, when it is possible. The size of symbols scales with the calculated moment magnitude Mw.
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download
Waveforms Seismic signals in miniseed + resp format Download