Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.6 on date 10-05-2020 and time 18:45:29 (Italy) in region 2 km N Grotte di Castro (VT)

A magnitude ML 1.6 earthquake occured in region: 2 km N Grotte di Castro (VT), on

  • 10-05-2020 16:45:29 (UTC)
  • 10-05-2020 18:45:29 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.6940, 11.8650 at 10 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.

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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
Grotte di Castro VT 2 2683 2683
San Lorenzo Nuovo VT 4 2091 4774
Onano VT 4 995 5769
Gradoli VT 6 1353 7122
Acquapendente VT 6 5506 12628
Proceno VT 8 557 13185
Latera VT 8 836 14021
Castel Giorgio TR 10 2131 16152
Bolsena VT 12 3991 20143
Sorano GR 12 3428 23571
Castel Viscardo TR 13 2938 26509
Valentano VT 14 2868 29377
Allerona TR 16 1794 31171
Castell'Azzara GR 16 1476 32647
Capodimonte VT 16 1731 34378
Pitigliano GR 17 3818 38196
Marta VT 18 3499 41695
Ischia di Castro VT 19 2326 44021
Porano TR 20 1966 45987
Farnese VT 20 1527 47514
Piansano VT 20 2079 49593
San Casciano dei Bagni SI 20 1632 51225

Municipalities with at least 50000 inhabitants

An earthquake occurred to
37 Km NW of Viterbo (67173 inhabitants)
62 Km E of Grosseto (82087 inhabitants)
63 Km SW of Perugia (166134 inhabitants)
66 Km W of Terni (111501 inhabitants)
67 Km N of Civitavecchia (52991 inhabitants)
74 Km W of Foligno (57155 inhabitants)
82 Km SE of Siena (53903 inhabitants)
86 Km S of Arezzo (99543 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
Bulletin
Rev1000 		ML 1.6 2020-05-10
16:45:29		 42.6942 11.8647 10 2020-11-19
12:36:45		 Bollettino Sismico Italiano INGV 79415351
Reviewed
Rev100 		ML 1.6 2020-05-10
16:45:29		 42.7078 11.8773 10 2020-05-10
17:00:39		 Sala Sismica INGV-Roma 79017601
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-05-10 16:45:29 ± 0.08
Latitude 42.6942 ± 0.0045
Longitude 11.8647 ± 0.0061
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 79415351

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 459
Semi-minor axis of confidence ellipse (meter) 457
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 358
Circular confidence region, given by single value of horizontal uncertainty (meter) 460.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 79
Number of associated phases, regardless of their use for origin computation 47
Number of defining phases 36
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.3
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.75003
Number of stations at which the event was observed 30
Number of stations from which data was used for origin computation 19
Magnitudes information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.1
Num. used stations 18
Type of magnitude ML
Reference to an origin 79017601
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-05-10 17:00:39

ML:1.6

Field Value
Value 1.6
Uncertainty 0.2
Num. used stations 22
Type of magnitude ML
Reference to an origin 79415351
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-08-19 13:58:12
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IT.VRB.HGZ. 2020-05-10T16:47:19.19 3.0 undecidable manual Sn -3.03 0
OX.VARN.HHZ. 2020-05-10T16:47:03.78 3.0 undecidable manual Sn -0.35 0
IV.CADC.HNZ. 2020-05-10T16:47:02.04 3.0 undecidable manual Sg 4.05 0
IV.ECTS.HHZ. 2020-05-10T16:46:51.45 3.0 positive manual Pn -1.07 0
CR.ZAG.BHZ. 2020-05-10T16:46:40.70 3.0 positive manual Pn 3.97 0
IV.SARZ.HHZ. 2020-05-10T16:46:29.69 3.0 positive manual Pg 9.56 0
IV.BRSN.EHZ. 2020-05-10T16:46:21.56 3.0 undecidable manual S -0.9 0
IV.LRP.EHZ. 2020-05-10T16:46:19.83 3.0 undecidable manual Sn -4.31 0
IV.PTRJ.HHZ. 2020-05-10T16:46:15.74 3.0 undecidable manual Pg 5.04 0
IV.NDIM.HHZ. 2020-05-10T16:46:09.25 3.0 positive manual Pn -0.36 0
IV.LPEL.HHZ. 2020-05-10T16:46:06.37 3.0 undecidable manual Pg 3.38 0
IV.MURB.HHE. 2020-05-10T16:45:55.26 0.3 undecidable manual S 40 82.7505 50 0.7 56
IV.ATCC.EHE. 2020-05-10T16:45:54.66 0.3 undecidable manual S 49 83.25 50 -0.03 66
IV.ATMI.HHZ. 2020-05-10T16:45:54.09 0.3 undecidable manual S 25 78.1662 50 0.75 55
IV.ATLO.EHE. 2020-05-10T16:45:54.19 0.3 undecidable manual S 32 81.7515 50 -0.1 66
IV.ATTE.HHZ. 2020-05-10T16:45:50.90 0.3 undecidable manual S 35 68.5758 50 0.13 67
IV.MOMA.HHZ. 2020-05-10T16:45:48.24 0.3 undecidable manual S 78 58.6968 50 0.09 69
IV.BARO.EHZ. 2020-05-10T16:45:45.90 0.3 undecidable manual S 163 51.8037 50 -0.39 65
IV.ATLO.EHE. 2020-05-10T16:45:44.08 0.3 positive manual P 32 81.7515 50 0.19 65
IV.MURB.HHE. 2020-05-10T16:45:44.54 0.3 undecidable manual P 40 82.7505 50 0.49 60
IV.ATCC.EHE. 2020-05-10T16:45:44.80 0.3 undecidable manual P 49 83.25 50 0.68 56
IV.ATMI.HHZ. 2020-05-10T16:45:43.27 0.3 undecidable manual P 25 78.1662 50 -0.07 67
IV.ATTE.HHZ. 2020-05-10T16:45:41.98 0.3 undecidable manual P 35 68.5758 50 0.12 67
IV.MGAB.HHZ. 2020-05-10T16:45:40.25 0.1 undecidable manual S 40 31.5462 50 -0.63 84
IV.MOMA.HHZ. 2020-05-10T16:45:40.33 0.3 undecidable manual P 78 58.6968 50 -0.02 70
TV.SF01.EHZ. 2020-05-10T16:45:39.60 0.1 undecidable manual S 298 27.8499 50 -0.29 93
IV.CESX.HHE. 2020-05-10T16:45:39.92 0.3 undecidable manual P 99 59.6958 50 -0.57 61
IV.BARO.EHZ. 2020-05-10T16:45:38.96 0.3 undecidable manual P 163 51.8037 50 -0.31 66
TV.SF04.EHZ. 2020-05-10T16:45:38.13 0.1 undecidable manual S 313 22.8549 113 -0.16 96
TV.SF11.HHZ. 2020-05-10T16:45:38.47 0.1 undecidable manual S 322 24.5532 111 -0.37 92
TV.SF13.HHZ. 2020-05-10T16:45:38.63 0.1 undecidable manual S 305 24.2535 112 -0.11 97
TV.SF03.EHZ. 2020-05-10T16:45:37.06 0.1 undecidable manual S 310 18.9699 117 0.01 100
IV.ARCI.HHZ. 2020-05-10T16:45:37.00 0.3 undecidable manual P 299 36.2415 50 0.13 71
TV.SF14.HHZ. 2020-05-10T16:45:37.70 0.1 undecidable manual S 288 21.4674 114 -0.15 97
IV.SACS.HHZ. 2020-05-10T16:45:36.60 0.1 undecidable manual S 12 17.5713 119 -0.03 100
IV.MCIV.CHZ. 2020-05-10T16:45:36.72 0.3 undecidable manual S 302 17.9709 118 -0.04 75
TV.SF01.EHZ. 2020-05-10T16:45:36.15 0.1 undecidable manual P 298 27.8499 50 0.57 86
TV.SF13.HHZ. 2020-05-10T16:45:35.03 0.1 undecidable manual P 305 24.2535 112 0.12 97
IV.MGAB.HHZ. 2020-05-10T16:45:35.37 0.1 undecidable manual P 40 31.5462 50 -0.78 79
TV.SF11.HHZ. 2020-05-10T16:45:35.00 0.1 undecidable manual P 322 24.5532 111 0.03 99
TV.SF04.EHZ. 2020-05-10T16:45:34.79 0.1 undecidable manual P 313 22.8549 113 0.14 97
TV.SF03.EHZ. 2020-05-10T16:45:34.11 0.1 undecidable manual P 310 18.9699 117 0.17 97
IV.MCIV.CHZ. 2020-05-10T16:45:34.00 0.3 undecidable manual P 302 17.9709 118 0.23 72
TV.SF14.HHZ. 2020-05-10T16:45:34.44 0.1 negative manual P 288 21.4674 114 0.05 99
IV.LATE.HHZ. 2020-05-10T16:45:34.75 0.1 undecidable manual S 209 10.1787 133 0.2 98
IV.SACS.HHZ. 2020-05-10T16:45:33.38 0.1 positive manual P 12 17.5713 119 -0.32 94
IV.LATE.HHZ. 2020-05-10T16:45:32.65 0.1 positive manual P 209 10.1787 133 0.16 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SACS.HNE. ML:1.7 0.0004462596 0.2304 AML other m 2020-05-10T16:45:36.82
IV.SACS.HHE. ML:1.7 0.0004056336 0.2432 AML other m 2020-05-10T16:45:36.83
IV.SACS.HHN. ML:1.7 0.0003903487 0.2432 AML other m 2020-05-10T16:45:37.14
IV.SACS.HNN. ML:1.7 0.00040028425 0.2432 AML other m 2020-05-10T16:45:37.02
IV.LATE.HHN. ML:1.9 0.0011295589 0.32 AML other m 2020-05-10T16:45:35.16
IV.LATE.HHE. ML:1.9 0.0009821823000000002 0.3328 AML other m 2020-05-10T16:45:35.31
IV.MCIV.CHE. ML:1.3 0.00017841625 0.3968 AML other m 2020-05-10T16:45:37.57
TV.SF04.EHE. ML:1.5 0.0001959024 0.3712 AML other m 2020-05-10T16:45:38.94
TV.SF04.EHN. ML:1.5 0.00021945890000000002 0.64 AML other m 2020-05-10T16:45:38.94
IV.MGAB.HHE. ML:1.6 0.00018138389999999998 0.2432 AML other m 2020-05-10T16:45:40.25
IV.MGAB.HNE. ML:1.6 0.00017635265 0.4992 AML other m 2020-05-10T16:45:40.45
IV.MGAB.HNN. ML:1.6 0.000177417 0.1408 AML other m 2020-05-10T16:45:40.55
IV.MGAB.HHN. ML:1.6 0.00020695750000000003 0.1664 AML other m 2020-05-10T16:45:40.55
TV.SF01.EHE. ML:1.4 0.00012887864999999997 0.3456 AML other m 2020-05-10T16:45:40.74
TV.SF01.EHN. ML:1.4 0.00013026773 0.2432 AML other m 2020-05-10T16:45:40.49
IV.ARCI.HHN. ML:1.1 0.00005067857 1.6 AML other m 2020-05-10T16:45:43.88
IV.MOMA.HHE. ML:1.4 0.000052527275 0.1536 AML other m 2020-05-10T16:45:49.22
IV.MOMA.HHN. ML:1.2 0.00003381342499999999 0.4864 AML other m 2020-05-10T16:45:48.97
IV.ATTE.HHE. ML:1.5 0.000060484024999999994 0.8832 AML other m 2020-05-10T16:45:50.89
IV.ATTE.HHN. ML:1.6 0.00007500498999999999 0.2304 AML other m 2020-05-10T16:45:51.76
IV.ATMI.HHE. ML:1.7 0.000075364425 0.192 AML other m 2020-05-10T16:45:55.28
IV.ATMI.HHN. ML:1.6 0.000062040755 0.2432 AML other m 2020-05-10T16:45:55.25
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