Earthquake with magnitude of ML 1.9 on date 13-08-2020 and time 20:21:44 (UTC) in region 5 km E Balsorano (AQ)

A magnitude ML 1.9 earthquake occured in region: 5 km E Balsorano (AQ), on

  • 13-08-2020 20:21:44 (UTC)
  • 13-08-2020 22:21:44 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 41.82, 13.621 at 17 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
Balsorano AQ 5 3569 3569
Villavallelonga AQ 5 919 4488
Collelongo AQ 8 1233 5721
San Vincenzo Valle Roveto AQ 8 2347 8068
Pescosolido FR 8 1555 9623
Campoli Appennino FR 10 1725 11348
Sora FR 11 26144 37492
Broccostella FR 13 2741 40233
Lecce nei Marsi AQ 14 1702 41935
Pescasseroli AQ 14 2203 44138
Morino AQ 14 1448 45586
Civita d'Antino AQ 14 979 46565
Ortucchio AQ 15 1860 48425
Posta Fibreno FR 15 1139 49564
Bisegna AQ 16 223 49787
Isola del Liri FR 16 11715 61502
Gioia dei Marsi AQ 16 1989 63491
Castelliri FR 17 3454 66945
Trasacco AQ 17 6246 73191
Fontechiari FR 17 1303 74494
Vicalvi FR 17 783 75277
Alvito FR 18 2713 77990
Opi AQ 18 420 78410
Arpino FR 19 7262 85672
Civitella Roveto AQ 19 3268 88940

Municipalities with at least 50000 inhabitants

An earthquake occurred to
62 Km SE of L'Aquila (69753 inhabitants)
70 Km E of Tivoli (56533 inhabitants)
71 Km NE of Latina (125985 inhabitants)
72 Km E of Velletri (53303 inhabitants)
74 Km SW of Chieti (51815 inhabitants)
77 Km E of Guidonia Montecelio (88673 inhabitants)
85 Km E of Aprilia (73446 inhabitants)
87 Km SW of Pescara (121014 inhabitants)
89 Km SW of Montesilvano (53738 inhabitants)
92 Km E of Anzio (54211 inhabitants)
94 Km S of Teramo (54892 inhabitants)
94 Km E of Pomezia (62966 inhabitants)
95 Km E of Roma (2864731 inhabitants)
Recent and historical seismicity

These maps show the seismicity for different time windows. The earthquake locations reported in these maps are determined in quasi real-time by the personnel on duty in the seismic surveillance center of INGV in Rome. Note that the earthquake source parameters (hypocentral location and magnitude) are the best estimates obstained with the available data and they are adjourned as additional data become available. The source parameters obtained by the personnel on duty are then revised by the group in charge of the INGV Seismic Bulletin (Bollettino Sismico Italiano dell’INGV).

Earthquakes of the 3 days preceding this event

Earthquakes of the 3 days preceding this event *

This map reports the earthquake epicenters located in the 72 hours (3 days) preceding the time of the current earthquake occurrence, using the data acquired by the Italian National Seismic Network and by other collaborating networks in Italy and in the neighbouring countries. The radius of the circle representing the earthquake on the map scales with magnitude. The color depends on the time of occurrence of the earthquakes with respect to the time of generation of the map (red = 1 hour; orange = 24 hours; yellow = 72 hours). The open star shows the epicenter of the current earthquake.
Earthquakes of the 90 days preceding this event

Earthquakes of the 90 days preceding this event *

This map reports the Magnitudo ≥ 1.0 earthquake epicenters located in the 90 days preceding the time of the current earthquake occurrence, using the data acquired by the Italian National Seismic Network and by other collaborating networks in Italy and in the neighbouring countries. The radii of the circles representing the epicenters on the map scale with magnitude. The color of each circle depends on the time of occurrence of the earthquakes with respect to the time of generation of the map (red = 1 hour; orange = 24 hours; yellow = 72 hours; blue = all other earthquakes). The open star shows 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 reports the Magnitudo ≥ 2.5 earthquake epicenters located using the data acquired by the Italian National Seismic Network and by other collaborating networks in Italy and in the neighbouring countries. The radii of the circles representing the epicenters on the map scale with magnitude. The color of each circle depends on the time of occurrence of the earthquakes with respect to the time of generation of the map (red = 1 hour; orange = 24 hours; yellow = 72 hours; blue = all other earthquakes). The open star shows 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 https://emidius.mi.ingv.it/CPTI15-DBMI15/) with estimated magnitude ≥ 5.0 since 1000 AD until 2014. The epicenters are represented by squares which sides scale with the estimated earthquake magnitude. For earthquakes with magnitude ≥ 6.0, it is also shown the year of occurrence and the magnitude value. The open star shows the epicenter of the current earthquake.
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 the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire (http://www.haisentitoilterremoto.it/) that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Bulletin
Rev1000
ML 1.9 2020-08-13
20:21:44
41.8203 13.6212 17 2020-11-19
12:37:05
Bollettino Sismico Italiano INGV 84062511
Reviewed
Rev100
ML 2.0 2020-08-13
20:21:44
41.8202 13.6218 17 2020-08-13
20:33:14
Sala Sismica INGV-Roma 81952091
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-08-13 20:21:44 ± 0.06
Latitude 41.8203 ± 0.0027
Longitude 13.6212 ± 0.0036
Depth (km) 17 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 84062511

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 340
Semi-minor axis of confidence ellipse (meter) 148
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 47
Circular confidence region, given by single value of horizontal uncertainty (meter) 340
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 56
Number of associated phases, regardless of their use for origin computation 34
Number of defining phases 32
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.19
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.75093
Number of stations at which the event was observed 24
Number of stations from which data was used for origin computation 22
Magnitudes information

ML:2

Field Value
Value 2
Uncertainty 0.3
Num. used stations 34
Type of magnitude ML
Reference to an origin 81952091
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-08-13 20:33:14

ML:1.9

Field Value
Value 1.9
Uncertainty 0.2
Num. used stations 40
Type of magnitude ML
Reference to an origin 84062511
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-10-23 17:02:40
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.MCIV.CHZ. 2020-08-13T20:22:40.28 3.0 undecidable manual Sg 5.84 0
IV.PAOL.HHZ. 2020-08-13T20:22:20.52 3.0 undecidable manual S 2.44 0
IV.RM33.EHZ. 2020-08-13T20:21:59.60 0.6 undecidable manual P 336 0.7509 95 0.63 38
IT.SULA.HNN. 2020-08-13T20:21:57.52 0.3 undecidable manual S 41 0.3345 103 0.3 68
IT.SULP.HGN. 2020-08-13T20:21:57.72 0.3 undecidable manual S 41 0.3489 103 0.09 71
IT.SULC.HNZ. 2020-08-13T20:21:57.06 0.3 undecidable manual S 41 0.3274 104 0.06 72
IV.VAGA.HHZ. 2020-08-13T20:21:57.13 1.0 undecidable manual P 131 0.6115 96 0.55 21
IV.VCEL.EHZ. 2020-08-13T20:21:56.39 0.3 undecidable manual P 16 0.5963 96 0.06 68
IV.FIAM.HNN. 2020-08-13T20:21:56.51 1.0 undecidable manual P 320 0.5828 96 0.4 21
IV.INTR.HHZ. 2020-08-13T20:21:55.46 0.3 undecidable manual S 48 0.2842 107 -0.32 70
IV.LATB.EHZ. 2020-08-13T20:21:55.76 0.3 undecidable manual P 237 0.59 96 -0.47 62
IV.PTQR.HHZ. 2020-08-13T20:21:55.01 0.3 undecidable manual S 321 0.2599 109 -0.08 74
IV.GUAR.HHZ. 2020-08-13T20:21:54.11 0.3 undecidable manual S 264 0.2311 112 -0.19 72
IV.LPEL.HHZ. 2020-08-13T20:21:54.02 0.6 undecidable manual P 61 0.4748 98 -0.25 45
IV.MIDA.HNZ. 2020-08-13T20:21:54.70 0.3 undecidable manual P 110 0.5045 98 -0.07 69
IV.FAGN.HHZ. 2020-08-13T20:21:53.64 0.3 undecidable manual P 356 0.4461 99 -0.14 70
IV.RNI2.HHZ. 2020-08-13T20:21:53.57 0.3 undecidable manual P 106 0.4128 100 0.34 67
IT.OPI.HGZ. 2020-08-13T20:21:52.32 0.3 undecidable manual S 106 0.1619 124 -0.15 73
IV.LRP.EHZ. 2020-08-13T20:21:52.87 0.3 undecidable manual S 188 0.1754 121 0.06 75
IV.CERA.HHZ. 2020-08-13T20:21:52.49 0.3 undecidable manual P 127 0.3705 102 -0.02 72
IV.MCI.EHZ. 2020-08-13T20:21:52.11 0.3 undecidable manual P 156 0.3588 102 -0.21 69
IV.GIUL.HHZ. 2020-08-13T20:21:52.76 0.1 negative manual P 226 0.3786 101 0.11 95
IV.INTR.HHZ. 2020-08-13T20:21:51.03 0.1 positive manual P 48 0.2842 107 -0.05 98
IT.SULA.HNN. 2020-08-13T20:21:51.86 0.3 undecidable manual P 41 0.3345 103 -0.06 73
IT.SULP.HGN. 2020-08-13T20:21:51.94 0.3 undecidable manual P 41 0.3489 103 -0.21 70
IV.POFI.HHZ. 2020-08-13T20:21:51.64 0.3 undecidable manual S 147 0.1232 133 0.07 76
IT.SULC.HNZ. 2020-08-13T20:21:51.37 0.3 undecidable manual P 41 0.3274 104 -0.42 67
IV.PTQR.HHZ. 2020-08-13T20:21:50.77 0.3 undecidable manual P 321 0.2599 109 0.09 73
IV.VVLD.HHZ. 2020-08-13T20:21:50.18 0.3 undecidable manual S 2 0.0495 159 -0.15 75
IV.GUAR.HHZ. 2020-08-13T20:21:50.38 0.1 negative manual P 264 0.2311 112 0.16 97
IT.OPI.HGZ. 2020-08-13T20:21:49.23 0.1 positive manual P 106 0.1619 124 0.05 100
IV.LRP.EHZ. 2020-08-13T20:21:49.52 0.1 negative manual P 188 0.1754 121 0.16 98
IV.POFI.HHZ. 2020-08-13T20:21:48.82 0.1 positive manual P 147 0.1232 133 0.17 99
IV.VVLD.HHZ. 2020-08-13T20:21:48.08 0.1 positive manual P 2 0.0495 159 0.14 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.VVLD.HNE. ML:2.4 0.002614361 0.2688 AML other m 2020-08-13T20:21:50.48
IV.VVLD.HHE. ML:2.5 0.0028096375 0.2688 AML other m 2020-08-13T20:21:50.48
IV.VVLD.HHN. ML:2.3 0.0021927105 0.1152 AML other m 2020-08-13T20:21:50.43
IV.VVLD.HNN. ML:2.3 0.0020356205 0.1408 AML other m 2020-08-13T20:21:50.41
IV.POFI.HNN. ML:1.8 0.0005434166 0.1536 AML other m 2020-08-13T20:21:53.06
IV.POFI.HNE. ML:1.7 0.00037658305 0.256 AML other m 2020-08-13T20:21:53.51
IV.POFI.HHE. ML:1.7 0.00035058635 0.256 AML other m 2020-08-13T20:21:53.50
IV.POFI.HHN. ML:1.8 0.00047769625 0.1408 AML other m 2020-08-13T20:21:53.05
IV.LRP.EHE. ML:2.1 0.00080535855 0.1408 AML other m 2020-08-13T20:21:53.83
IV.LRP.EHN. ML:1.5 0.00020490525 0.1408 AML other m 2020-08-13T20:21:54.12
IV.GUAR.HHN. ML:2 0.00052180605 0.0896 AML other m 2020-08-13T20:21:54.62
IV.GUAR.HHE. ML:1.9 0.0003959352 0.0768 AML other m 2020-08-13T20:21:50.51
IV.PTQR.HHE. ML:1.6 0.0001945925 0.32 AML other m 2020-08-13T20:21:55.51
IV.PTQR.HHN. ML:1.5 0.00013501185 0.2176 AML other m 2020-08-13T20:21:56.69
IV.INTR.HHN. ML:2.2 0.00067391345 0.2432 AML other m 2020-08-13T20:21:56.28
IV.INTR.HHE. ML:2.1 0.00054171565 0.256 AML other m 2020-08-13T20:21:56.28
IV.INTR.HNN. ML:2.2 0.00060763675 0.256 AML other m 2020-08-13T20:21:56.15
IV.INTR.HNE. ML:2.1 0.00055229705 0.2688 AML other m 2020-08-13T20:21:56.28
IV.MCI.EHN. ML:1.9 0.0002539349 0.2688 AML other m 2020-08-13T20:22:05.62
IV.MCI.EHE. ML:2 0.00031434425 0.2688 AML other m 2020-08-13T20:21:59.29
IV.CERA.HNN. ML:1.8 0.00020405155 0.6272 AML other m 2020-08-13T20:22:04.41
IV.CERA.HHN. ML:1.8 0.0001754388 0.2816 AML other m 2020-08-13T20:22:03.02
IV.CERA.HHE. ML:1.8 0.0002049146 0.32 AML other m 2020-08-13T20:22:03.87
IV.CERA.HNE. ML:1.9 0.0002280632 0.512 AML other m 2020-08-13T20:22:03.62
IV.GIUL.HHE. ML:1.6 0.000123353275 0.2048 AML other m 2020-08-13T20:22:00.56
IV.GIUL.HHN. ML:1.6 0.00012372525 0.2304 AML other m 2020-08-13T20:22:02.37
IV.RNI2.HNN. ML:2 0.00025776195 0.4608 AML other m 2020-08-13T20:22:04.86
IV.RNI2.HNE. ML:1.8 0.0001838793 0.2944 AML other m 2020-08-13T20:22:06.29
IV.RNI2.HHN. ML:2 0.0002645161 0.4864 AML other m 2020-08-13T20:22:04.86
IV.RNI2.HHE. ML:1.9 0.00019785095 0.2944 AML other m 2020-08-13T20:22:06.14
IV.FAGN.HHN. ML:2.2 0.0003967827 0.3584 AML other m 2020-08-13T20:22:06.09
IV.FAGN.HHE. ML:2 0.0002561444 0.4864 AML other m 2020-08-13T20:22:08.20
IV.LPEL.HNN. ML:1.8 0.00015119495 0.192 AML other m 2020-08-13T20:22:07.04
IV.LPEL.HNE. ML:1.9 0.000195968635 0.2304 AML other m 2020-08-13T20:22:06.34
IV.LPEL.HHN. ML:1.8 0.0001567535 0.1408 AML other m 2020-08-13T20:22:04.90
IV.LPEL.HHE. ML:1.9 0.00020610025 0.1152 AML other m 2020-08-13T20:22:03.36
IV.LATB.EHE. ML:1.4 4.631176E-5 0.384 AML other m 2020-08-13T20:22:04.89
IV.LATB.EHN. ML:1.2 2.3498795E-5 0.6144 AML other m 2020-08-13T20:22:08.10
IV.VCEL.EHE. ML:2 0.0001813303 0.3584 AML other m 2020-08-13T20:22:12.08
IV.VCEL.EHN. ML:1.7 8.900933E-5 0.1792 AML other m 2020-08-13T20:22:11.05
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Fault Plane solutions

Fault Plane solutions *

This map reports the focal mechanisms since 1977 in the region. The white and red beach ball symbols are mechanisms determined using the Regional Centroid Moment Tensor (RCMT, http://www.bo.ingv.it/RCMT) and are determined for earthquakes with magnitude larger than 4.5 in the Euro-Mediterranenan area. Occasionally, when there is a good source-receiver geometry of the target earthquake, the RCMT can be obtained also for earthquakes with magnitude larger than 4.0. The blue and white beach ball symbols indicate the mechanisms obtained from application of the Time Domain Moment Tensor (TDMT, http://terremoti.ingv.it/tdmt.html). This technique is used for M ≥ 3.5. The size of the beach ball sysmbol 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