Earthquake with magnitude of ML 0.9 on date 15-08-2021 and time 20:00:15 (Italy) in region 3 km N Sora (FR)

A magnitude ML 0.9 earthquake occured in region: 3 km N Sora (FR), on

  • 15-08-2021 18:00:15 (UTC)
  • 15-08-2021 20:00:15 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 41.749, 13.619 at 16 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

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
Pescosolido FR 3 1555 1555
Sora FR 3 26144 27699
Campoli Appennino FR 5 1725 29424
Broccostella FR 5 2741 32165
Balsorano AQ 8 3569 35734
Isola del Liri FR 9 11715 47449
Posta Fibreno FR 9 1139 48588
Castelliri FR 10 3454 52042
Fontechiari FR 10 1303 53345
Vicalvi FR 11 783 54128
Arpino FR 11 7262 61390
Alvito FR 12 2713 64103
San Vincenzo Valle Roveto AQ 12 2347 66450
Villavallelonga AQ 13 919 67369
Monte San Giovanni Campano FR 15 12929 80298
Casalvieri FR 15 2698 82996
Collelongo AQ 16 1233 84229
Pescasseroli AQ 16 2203 86432
Santopadre FR 16 1357 87789
Fontana Liri FR 16 2953 90742
Casalattico FR 17 574 91316
San Donato Val di Comino FR 17 2107 93423
Boville Ernica FR 17 8737 102160
Veroli FR 18 20560 122720
Opi AQ 18 420 123140
Gallinaro FR 18 1269 124409
Rocca d'Arce FR 18 959 125368
Arce FR 18 5756 131124
Morino AQ 19 1448 132572
Strangolagalli FR 19 2491 135063
Civita d'Antino AQ 20 979 136042

Municipalities with at least 50000 inhabitants

An earthquake occurred to
67 Km E of Latina (125985 inhabitants)
70 Km S of L'Aquila (69753 inhabitants)
70 Km E of Velletri (53303 inhabitants)
72 Km E of Tivoli (56533 inhabitants)
79 Km E of Guidonia Montecelio (88673 inhabitants)
81 Km SW of Chieti (51815 inhabitants)
82 Km E of Aprilia (73446 inhabitants)
89 Km E of Anzio (54211 inhabitants)
93 Km E of Pomezia (62966 inhabitants)
94 Km SW of Pescara (121014 inhabitants)
95 Km E of Roma (2864731 inhabitants)
96 Km NW of Caserta (76326 inhabitants)
96 Km SW of Montesilvano (53738 inhabitants)
99 Km NW of Aversa (53047 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
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
Reviewed
Rev100
ML 0.9 2021-08-15
18:00:15
41.7487 13.6193 16 2021-08-15
18:08:23
Sala Sismica INGV-Roma 94214351
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-08-15 18:00:15 ± 0.17
Latitude 41.7487 ± 0.0054
Longitude 13.6193 ± 0.0072
Depth (km) 16 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 94214351

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 581
Semi-minor axis of confidence ellipse (meter) 300
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 325
Circular confidence region, given by single value of horizontal uncertainty (meter) 580
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 126
Number of associated phases, regardless of their use for origin computation 37
Number of defining phases 10
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.21
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.40649
Number of stations at which the event was observed 30
Number of stations from which data was used for origin computation 6
Magnitude information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.6
Num. used stations 9
Type of magnitude ML
Reference to an origin 94214351
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-08-15 18:08:23
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.ALJA.HHZ. 2021-08-15T18:01:54.04 3.0 undecidable manual Sn -6.19 0
CH.FUORN.HHZ. 2021-08-15T18:01:47.64 3.0 undecidable manual Pg 16.52 0
IV.GIZZ.HHZ. 2021-08-15T18:01:46.77 3.0 undecidable manual Sg 6.83 0
ST.OZOL.EHZ. 2021-08-15T18:01:41.01 3.0 negative manual Pg 16.16 0
HL.VLS.HHZ. 2021-08-15T18:01:38.13 3.0 undecidable manual Pn -2.66 0
IV.MILN.HNZ. 2021-08-15T18:01:28.82 3.0 undecidable manual Pn 3.68 0
IV.ZONE.HHZ. 2021-08-15T18:01:28.93 3.0 undecidable manual Pn 6.66 0
GU.GSCL.HHZ. 2021-08-15T18:01:16.19 3.0 undecidable manual Pg 11.32 0
IV.SBPO.HNZ. 2021-08-15T18:01:16.23 3.0 undecidable manual Pg 6.45 0
AC.VLO.HHZ. 2021-08-15T18:01:15.98 3.0 undecidable manual Pn 1.26 0
IV.ZEN8.EHZ. 2021-08-15T18:01:11.77 3.0 undecidable manual Pn -5.6 0
IV.PTRP.HHZ. 2021-08-15T18:01:09.06 3.0 undecidable manual Sg 1.11 0
IV.SELL.HHZ. 2021-08-15T18:01:04.16 3.0 undecidable manual Pg 0.81 0
IX.SCL3.EHZ.02 2021-08-15T18:00:57.55 3.0 undecidable manual Sg -0.24 0
IV.PARC.HHZ. 2021-08-15T18:00:53.54 3.0 negative manual Pg 6.93 0
IV.CRE.HHZ. 2021-08-15T18:00:51.51 3.0 positive manual Pg 3.33 0
IV.RCAV.EHZ. 2021-08-15T18:00:41.37 3.0 undecidable manual Sn 0.65 0
IV.RM33.HNZ. 2021-08-15T18:00:41.55 3.0 undecidable manual Sn -0.22 0
IV.TERO.HHZ. 2021-08-15T18:00:37.40 3.0 undecidable manual Sn -2.27 0
IV.CERA.HHZ. 2021-08-15T18:00:34.75 3.0 undecidable manual S 0
IV.RM33.HNZ. 2021-08-15T18:00:31.53 3.0 undecidable manual Pg 3.1 0
IV.OVO.HHZ. 2021-08-15T18:00:31.68 3.0 undecidable manual Pg 1.23 0
IV.CERA.HHZ. 2021-08-15T18:00:29.11 3.0 undecidable manual P 0
IX.RSF3.HHZ.02 2021-08-15T18:00:29.21 3.0 undecidable manual Pg -3.15 0
IV.FIAM.HHZ. 2021-08-15T18:00:26.52 3.0 undecidable manual Pn -0.82 0
IT.OPI.HGN. 2021-08-15T18:00:23.48 0.1 undecidable manual S 80 0.1592 120 0.11 98
IV.GIUL.HHZ. 2021-08-15T18:00:23.02 0.3 undecidable manual P 235 0.3318 101 0.06 72
IT.SULP.HGN. 2021-08-15T18:00:23.74 0.3 undecidable manual P 34 0.4065 98 -0.48 65
IV.VVLD.HHZ. 2021-08-15T18:00:22.40 0.1 undecidable manual S 1 0.1214 130 -0.04 99
IV.T0110.HHZ. 2021-08-15T18:00:21.57 3.0 undecidable manual S 0
IV.POFI.HHZ. 2021-08-15T18:00:21.40 0.1 undecidable manual S 114 0.0755 146 -0.15 99
IV.LRP.EHZ. 2021-08-15T18:00:21.93 0.1 undecidable manual S 194 0.1043 136 -0.15 99
IV.T0110.HHZ. 2021-08-15T18:00:20.47 3.0 undecidable manual P 0
IT.OPI.HGN. 2021-08-15T18:00:20.25 0.1 undecidable manual P 80 0.1592 120 0.08 98
IV.VVLD.HHZ. 2021-08-15T18:00:19.80 0.1 undecidable manual P 1 0.1214 130 0.17 98
IV.POFI.HHZ. 2021-08-15T18:00:19.20 0.1 undecidable manual P 114 0.0755 146 0.09 100
IV.LRP.EHZ. 2021-08-15T18:00:19.60 0.1 undecidable manual P 194 0.1043 136 0.18 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.POFI.HHE. ML:0.2 1.525E-5 0.66 AML other m 2021-08-15T18:00:21.71
IV.T0110.HHE. ML:1.7 0.0001109 0.96 AML other m 2021-08-15T18:00:21.47
IV.LRP.EHE. ML:1.1 0.0001033 0.14 AML other m 2021-08-15T18:00:22.18
IV.POFI.HHN. ML:0.2 1.465E-5 1.48 AML other m 2021-08-15T18:00:22.90
IV.T0110.HHN. ML:1.8 0.000157 1 AML other m 2021-08-15T18:00:22.46
IV.LRP.EHN. ML:0.7 4.0E-5 0.88 AML other m 2021-08-15T18:00:22.12
IV.VVLD.HHN. ML:0.8 4.785E-5 0.38 AML other m 2021-08-15T18:00:22.65
IV.VVLD.HHE. ML:0.6 3.25E-5 0.44 AML other m 2021-08-15T18:00:22.50
IX.RSF3.HHE.02 ML:2.2 7.8372675E-5 0.0512 AML other m 2021-08-15T18:00:40.20
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download