Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.0 on date 03-08-2021 and time 02:51:19 (Italy) in region 6 km W Sora (FR)

A magnitude ML 1.0 earthquake occured in region: 6 km W Sora (FR), on

  • 03-08-2021 00:51:19 (UTC)
  • 03-08-2021 02:51:19 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 41.7390, 13.5520 at 8 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.

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Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Sora FR 6 26144 26144
Castelliri FR 7 3454 29598
Isola del Liri FR 7 11715 41313
Balsorano AQ 7 3569 44882
Broccostella FR 8 2741 47623
Pescosolido FR 9 1555 49178
Campoli Appennino FR 11 1725 50903
San Vincenzo Valle Roveto AQ 11 2347 53250
Arpino FR 11 7262 60512
Monte San Giovanni Campano FR 11 12929 73441
Veroli FR 12 20560 94001
Boville Ernica FR 13 8737 102738
Fontechiari FR 13 1303 104041
Posta Fibreno FR 13 1139 105180
Fontana Liri FR 14 2953 108133
Vicalvi FR 15 783 108916
Collepardo FR 16 968 109884
Villavallelonga AQ 16 919 110803
Strangolagalli FR 16 2491 113294
Morino AQ 16 1448 114742
Santopadre FR 17 1357 116099
Collelongo AQ 17 1233 117332
Arce FR 17 5756 123088
Alvito FR 17 2713 125801
Rocca d'Arce FR 17 959 126760
Alatri FR 17 28952 155712
Ripi FR 17 5270 160982
Torrice FR 18 4816 165798
Civita d'Antino AQ 18 979 166777
Vico nel Lazio FR 18 2234 169011
Casalvieri FR 18 2698 171709
Casalattico FR 19 574 172283
Frosinone FR 20 46323 218606

Municipalities with at least 50000 inhabitants

An earthquake occurred to
62 Km NE of Latina (125985 inhabitants)
65 Km E of Velletri (53303 inhabitants)
67 Km E of Tivoli (56533 inhabitants)
69 Km S of L'Aquila (69753 inhabitants)
74 Km E of Guidonia Montecelio (88673 inhabitants)
77 Km E of Aprilia (73446 inhabitants)
83 Km E of Anzio (54211 inhabitants)
85 Km SW of Chieti (51815 inhabitants)
88 Km E of Pomezia (62966 inhabitants)
90 Km E of Roma (2864731 inhabitants)
98 Km SW of Pescara (121014 inhabitants)
98 Km NW of Caserta (76326 inhabitants)
99 Km SW of Montesilvano (53738 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100 		ML 1.0 2021-08-03
00:51:19		 41.7392 13.5523 8 2021-08-03
00:59:42		 Sala Sismica INGV-Roma 93583921
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-08-03 00:51:19 ± 0.05
Latitude 41.7392 ± 0.0027
Longitude 13.5523 ± 0.0036
Depth (km) 8 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 93583921

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 328
Semi-minor axis of confidence ellipse (meter) 83
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 32
Circular confidence region, given by single value of horizontal uncertainty (meter) 330.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 53
Number of associated phases, regardless of their use for origin computation 26
Number of defining phases 26
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) 0.09533
Epicentral distance of station farthest from the epicenter (degree) 0.47394
Number of stations at which the event was observed 13
Number of stations from which data was used for origin computation 13
Magnitude information

ML:1.0

Field Value
Value 1.0
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 93583921
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-08-03 00:59:42
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.RCAV.EHE. 2021-08-03T00:51:37.17 0.6 undecidable manual S 284 51.6039 50 0.6 41
IV.CERT.HHN. 2021-08-03T00:51:37.05 0.6 undecidable manual S 296 52.6029 50 0.22 45
IV.CERA.HHZ. 2021-08-03T00:51:33.86 0.6 undecidable manual S 112 41.625 50 -0.06 47
IV.INTR.HHZ. 2021-08-03T00:51:33.65 0.6 undecidable manual S 44 41.9247 50 -0.34 45
IV.MCI.EHN. 2021-08-03T00:51:32.19 0.6 undecidable manual S 142 35.0427 50 0.05 48
IV.PTQR.HHZ. 2021-08-03T00:51:31.82 0.6 undecidable manual S 338 33.744 104 0.07 48
IV.GIUL.HHZ. 2021-08-03T00:51:30.96 0.6 undecidable manual S 231 31.8459 104 -0.13 47
IV.CERT.HHN. 2021-08-03T00:51:29.18 0.3 undecidable manual P 296 52.6029 50 -0.41 65
IV.RCAV.EHE. 2021-08-03T00:51:29.66 0.3 undecidable manual P 284 51.6039 50 0.22 67
IV.LIK.EHN.01 2021-08-03T00:51:29.33 0.6 undecidable manual S 179 26.5512 107 -0.01 49
IV.GUAR.HNE. 2021-08-03T00:51:27.28 0.6 undecidable manual S 287 20.7681 111 -0.16 48
IV.INTR.HHZ. 2021-08-03T00:51:27.66 0.3 undecidable manual P 44 41.9247 50 -0.29 68
IV.CERA.HHZ. 2021-08-03T00:51:27.80 0.3 undecidable manual P 112 41.625 50 -0.11 70
IT.OPI.HGZ. 2021-08-03T00:51:27.87 0.6 undecidable manual S 80 23.3544 109 -0.41 45
IV.MCI.EHN. 2021-08-03T00:51:27.07 0.3 undecidable manual P 142 35.0427 50 0.19 70
IV.GIUL.HHZ. 2021-08-03T00:51:26.07 0.3 undecidable manual P 231 31.8459 104 -0.2 70
IV.PTQR.HHZ. 2021-08-03T00:51:26.44 0.3 undecidable manual P 338 33.744 104 -0.21 70
IV.POFI.HHZ. 2021-08-03T00:51:25.52 0.6 undecidable manual S 100 13.4754 121 0.37 47
IV.LIK.EHN.01 2021-08-03T00:51:25.37 0.6 undecidable manual P 179 26.5512 107 0.11 48
IV.VVLD.HHZ. 2021-08-03T00:51:25.87 0.6 undecidable manual S 22 15.5733 118 0.06 49
IT.OPI.HGZ. 2021-08-03T00:51:25.03 0.3 undecidable manual P 80 23.3544 109 0.38 69
IV.GUAR.HNE. 2021-08-03T00:51:24.22 0.6 undecidable manual P 287 20.7681 111 0.05 49
IV.LRP.EHZ. 2021-08-03T00:51:24.18 0.6 undecidable manual S 164 10.5783 128 -0.16 49
IV.VVLD.HHZ. 2021-08-03T00:51:23.39 0.1 negative manual P 22 15.5733 118 0.17 97
IV.LRP.EHZ. 2021-08-03T00:51:22.32 0.1 undecidable manual P 164 10.5783 128 -0.05 100
IV.POFI.HHZ. 2021-08-03T00:51:22.92 0.1 undecidable manual P 100 13.4754 121 0.08 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.LRP.EHN. ML:0.6 0.00006030000000000001 0.28 AML other m 2021-08-03T00:51:25.51
IV.LRP.EHE. ML:1.1 0.0001565 0.16 AML other m 2021-08-03T00:51:25.72
IV.VVLD.HHN. ML:1.2 0.0001545 0.5 AML other m 2021-08-03T00:51:26.48
IV.VVLD.HHE. ML:1.2 0.00014299999999999998 0.2 AML other m 2021-08-03T00:51:26.57
IV.POFI.HHE. ML:0.7 0.0000577 0.94 AML other m 2021-08-03T00:51:27.53
IV.POFI.HHN. ML:0.7 0.00006155 0.56 AML other m 2021-08-03T00:51:27.28
IV.INTR.HHE. ML:1.3 0.00005885 0.64 AML other m 2021-08-03T00:51:34.36
IV.INTR.HHN. ML:1.2 0.0000486 1.1 AML other m 2021-08-03T00:51:36.13
IV.FAGN.HHE. ML:1.3 0.0000407 0.52 AML other m 2021-08-03T00:51:40.87
IV.FAGN.HHN. ML:1.1 0.000026249999999999998 0.46 AML other m 2021-08-03T00:51:41.26
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