Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.9 on date 20-10-2021 and time 21:06:49 (UTC) in region 3 km E Visso (MC)

A magnitude ML 1.9 earthquake occured in region: 3 km E Visso (MC), on

  • 20-10-2021 21:06:49 (UTC)
  • 20-10-2021 23:06:49 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.9230, 13.1190 at 9 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
Visso MC 3 1107 1107
Ussita MC 3 444 1551
Castelsantangelo sul Nera MC 4 281 1832
Preci PG 8 724 2556
Bolognola MC 12 142 2698
Monte Cavallo MC 12 145 2843
Acquacanina MC 13 121 2964
Fiordimonte MC 13 202 3166
Fiastra MC 13 559 3725
Pieve Torina MC 15 1458 5183
Norcia PG 15 4957 10140
Pievebovigliana MC 16 866 11006
Sellano PG 16 1079 12085
Montemonaco AP 17 604 12689
Montefortino FM 18 1178 13867
Muccia MC 19 915 14782
Sarnano MC 20 3264 18046
Montegallo AP 20 523 18569

Municipalities with at least 50000 inhabitants

An earthquake occurred to
34 Km E of Foligno (57155 inhabitants)
56 Km NE of Terni (111501 inhabitants)
56 Km NW of Teramo (54892 inhabitants)
63 Km E of Perugia (166134 inhabitants)
68 Km NW of L'Aquila (69753 inhabitants)
84 Km SW of Ancona (100861 inhabitants)
96 Km W of Montesilvano (53738 inhabitants)
100 Km NE of Viterbo (67173 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 1.9 2021-10-20
21:06:49		 42.9233 13.119 9 2022-03-30
13:04:26		 Bollettino Sismico Italiano INGV 99325871
Reviewed
Rev100 		ML 2.0 2021-10-20
21:06:49		 42.9282 13.116 9 2021-10-20
21:12:11		 Sala Sismica INGV-Roma 96811341
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-20 21:06:49 ± 0.04
Latitude 42.9233 ± 0.0018
Longitude 13.1190 ± 0.0037
Depth (km) 9 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 99325871

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 254
Semi-minor axis of confidence ellipse (meter) 157
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 59
Circular confidence region, given by single value of horizontal uncertainty (meter) 250.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 37
Number of associated phases, regardless of their use for origin computation 67
Number of defining phases 64
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.25
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.79050
Number of stations at which the event was observed 39
Number of stations from which data was used for origin computation 36
Magnitudes information

ML:1.9

Field Value
Value 1.9
Uncertainty 0.3
Num. used stations 66
Type of magnitude ML
Reference to an origin 99325871
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-01-04 15:31:46

ML:2.0

Field Value
Value 2.0
Uncertainty 0.3
Num. used stations 53
Type of magnitude ML
Reference to an origin 96811341
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-20 21:12:11
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ATMI.HHZ. 2021-10-20T21:07:15.64 3.0 undecidable manual S -0.03 0
IV.FRON.EHZ. 2021-10-20T21:07:12.64 0.6 undecidable manual S 334 73.1712 50 0.81 36
IV.ARVD.HHZ. 2021-10-20T21:07:10.45 0.6 undecidable manual S 347 65.3901 50 0.72 38
IV.MURB.HHZ. 2021-10-20T21:07:09.70 0.3 undecidable manual S 308 61.0944 50 1.09 48
IV.TERO.HHZ. 2021-10-20T21:07:06.05 0.3 undecidable manual S 130 51.7038 50 -0.04 69
IV.SRES.HHZ. 2021-10-20T21:07:06.32 3.0 undecidable manual P 0.63 0
IV.MOMA.HHZ. 2021-10-20T21:07:05.24 0.3 undecidable manual S 254 46.5201 50 0.52 63
IV.FOSV.EHZ. 2021-10-20T21:07:05.92 0.3 undecidable manual S 325 50.4162 50 0.19 68
IV.ATCC.EHZ. 2021-10-20T21:07:05.56 0.3 undecidable manual S 307 48.5181 50 0.33 66
IV.CAMP.HHE. 2021-10-20T21:07:05.21 0.3 undecidable manual S 151 49.0176 50 -0.18 68
IV.CING.HHZ. 2021-10-20T21:07:05.76 0.3 undecidable manual S 7 50.5161 50 -0.02 70
IV.NARO.HHZ. 2021-10-20T21:07:04.55 0.6 undecidable manual P 330 87.7455 50 0 44
IV.PIEI.HHZ. 2021-10-20T21:07:04.02 0.6 undecidable manual P 325 82.7505 50 0.26 42
IV.RM33.EHZ. 2021-10-20T21:07:04.91 0.3 undecidable manual S 170 46.62 50 0.17 68
IV.EL6.EHZ. 2021-10-20T21:07:04.22 0.3 undecidable manual S 358 45.0216 50 -0.1 69
IV.ASSB.HHZ. 2021-10-20T21:07:02.65 0.3 undecidable manual S 290 39.627 50 -0.22 68
IV.FRON.EHZ. 2021-10-20T21:07:02.16 0.3 undecidable manual P 334 73.1712 50 -0.14 65
IV.SNTG.HHZ. 2021-10-20T21:07:02.77 0.3 undecidable manual S 339 39.5271 50 -0.07 71
IV.SMA1.EHZ. 2021-10-20T21:07:01.88 0.3 undecidable manual S 151 36.9297 50 -0.27 68
IV.ARVD.HHZ. 2021-10-20T21:07:01.11 0.6 undecidable manual P 347 65.3901 50 0.02 45
IV.LNSS.HHZ. 2021-10-20T21:07:01.70 0.3 undecidable manual S 190 36.1416 50 -0.23 69
IV.GAVE.EHZ. 2021-10-20T21:07:00.51 0.3 undecidable manual S 216 31.5462 105 -0.09 71
IV.MF5.EHZ. 2021-10-20T21:07:00.20 0.3 undecidable manual S 75 28.5492 107 0.58 64
IV.MURB.HHZ. 2021-10-20T21:07:00.42 0.1 undecidable manual P 308 61.0944 50 -0.02 91
IV.RM33.EHZ. 2021-10-20T21:06:58.02 0.3 undecidable manual P 170 46.62 50 -0.18 68
IV.CAMP.HHE. 2021-10-20T21:06:58.22 0.3 undecidable manual P 151 49.0176 50 -0.36 65
IV.MML1.EHZ. 2021-10-20T21:06:58.15 0.3 undecidable manual S 331 24.2535 109 -0.04 73
IV.CING.HHZ. 2021-10-20T21:06:58.41 0.3 undecidable manual P 7 50.5161 50 -0.4 65
IV.ARRO.EHZ. 2021-10-20T21:06:58.25 0.3 undecidable manual P 217 47.8188 50 -0.14 69
IV.GUMA.HHZ. 2021-10-20T21:06:58.20 0.3 undecidable manual S 49 23.3544 110 0.29 69
IV.MOMA.HHZ. 2021-10-20T21:06:58.07 0.1 positive manual P 254 46.5201 50 -0.12 92
IV.TERO.HHZ. 2021-10-20T21:06:58.89 0.3 undecidable manual P 130 51.7038 50 -0.09 69
IV.FOSV.EHZ. 2021-10-20T21:06:58.48 0.3 undecidable manual P 325 50.4162 50 -0.3 66
IV.ATCC.EHZ. 2021-10-20T21:06:58.31 0.3 undecidable manual P 307 48.5181 50 -0.18 68
IV.OFFI.HHZ. 2021-10-20T21:06:58.63 0.3 undecidable manual P 88 46.0206 50 0.52 63
IV.EL6.EHZ. 2021-10-20T21:06:57.52 0.1 undecidable manual P 358 45.0216 50 -0.44 86
IV.MNTT.EHZ. 2021-10-20T21:06:57.88 0.1 positive manual P 68 41.625 50 0.45 86
IV.PF6.EHZ. 2021-10-20T21:06:57.74 0.3 undecidable manual S 14 24.5532 109 -0.56 65
IV.LNSS.HHZ. 2021-10-20T21:06:56.40 0.3 undecidable manual P 190 36.1416 50 -0.19 69
IT.FOPC.HGN. 2021-10-20T21:06:56.17 0.3 undecidable manual P 279 34.1436 50 -0.11 71
IV.SMA1.EHZ. 2021-10-20T21:06:56.53 0.3 undecidable manual P 151 36.9297 50 -0.18 69
IV.MNTP.HNZ. 2021-10-20T21:06:56.90 0.3 undecidable manual P 50 37.0296 50 0.18 69
IV.ASSB.HHZ. 2021-10-20T21:06:56.80 0.1 positive manual P 290 39.627 50 -0.33 89
IV.CESI.HHZ. 2021-10-20T21:06:56.85 0.3 undecidable manual S 298 19.5693 114 0.15 72
IV.CSP1.EHE. 2021-10-20T21:06:56.58 0.3 undecidable manual S 20 19.9689 113 -0.22 71
IV.SNTG.HHZ. 2021-10-20T21:06:56.88 0.3 undecidable manual P 339 39.5271 50 -0.22 68
IV.T1299.EHZ. 2021-10-20T21:06:56.47 3.0 undecidable manual P 0
IV.MF5.EHZ. 2021-10-20T21:06:55.36 0.1 positive manual P 75 28.5492 107 0.11 95
IV.SAP2.EHZ. 2021-10-20T21:06:55.53 0.3 undecidable manual P 50 29.748 106 0.05 72
IV.MMO1.EHZ. 2021-10-20T21:06:55.76 0.3 undecidable manual S 99 17.0718 117 -0.15 72
IV.GAVE.EHZ. 2021-10-20T21:06:55.75 0.1 positive manual P 216 31.5462 105 -0.06 96
IT.MTCL.HGZ. 2021-10-20T21:06:54.44 0.3 undecidable manual S 309 12.4764 124 -0.08 74
IV.PF6.EHZ. 2021-10-20T21:06:54.13 0.1 positive manual P 14 24.5532 109 -0.35 91
IV.MML1.EHZ. 2021-10-20T21:06:54.31 0.1 undecidable manual P 331 24.2535 109 -0.11 96
IV.NRCA.HNZ. 2021-10-20T21:06:54.04 0.3 undecidable manual S 182 9.9789 131 0.21 72
IV.GUMA.HHZ. 2021-10-20T21:06:54.35 0.1 positive manual P 49 23.3544 110 0.09 96
IV.CESI.HHZ. 2021-10-20T21:06:53.70 0.1 positive manual P 298 19.5693 114 0.14 96
IV.CSP1.EHE. 2021-10-20T21:06:53.49 0.1 positive manual P 20 19.9689 113 -0.13 96
IV.FEMA.HNZ. 2021-10-20T21:06:53.24 0.3 undecidable manual S 307 7.0929 140 0.12 74
IV.MMO1.EHZ. 2021-10-20T21:06:53.09 0.1 positive manual P 99 17.0718 117 -0.01 99
IV.FDMO.HHZ. 2021-10-20T21:06:53.99 0.3 undecidable manual S 348 12.7761 124 -0.63 64
IV.NRCA.HNZ. 2021-10-20T21:06:52.16 0.1 positive manual P 182 9.9789 131 0.25 95
IV.MC2.EHZ. 2021-10-20T21:06:52.92 0.1 undecidable manual S 103 5.7942 146 0.05 100
IV.FDMO.HHZ. 2021-10-20T21:06:52.34 0.1 negative manual P 348 12.7761 124 -0.01 100
IT.MTCL.HGZ. 2021-10-20T21:06:52.37 0.1 positive manual P 309 12.4764 124 0.06 99
IV.MC2.EHZ. 2021-10-20T21:06:51.52 0.1 negative manual P 103 5.7942 146 0.17 98
IV.FEMA.HNZ. 2021-10-20T21:06:51.76 0.1 positive manual P 307 7.0929 140 0.26 96
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FEMA.HNE. ML:2.6 0.007390000000000001 0.22 AML other m 2021-10-20T21:06:53.49
IV.FEMA.HNN. ML:2.4 0.004735 0.28 AML other m 2021-10-20T21:06:53.76
IV.FDMO.HHN. ML:2.0 0.001089 0.4 AML other m 2021-10-20T21:06:54.62
IV.FDMO.HHE. ML:1.9 0.0008919999999999999 0.14 AML other m 2021-10-20T21:06:56.38
IV.CESI.HNE. ML:2.1 0.000925 0.48 AML other m 2021-10-20T21:06:57.31
IV.CESI.HNN. ML:2.5 0.002385 0.22 AML other m 2021-10-20T21:06:57.19
IV.CESI.HHE. ML:2.2 0.00115 0.24 AML other m 2021-10-20T21:06:57.31
IV.CESI.HHN. ML:2.5 0.002445 0.22 AML other m 2021-10-20T21:06:57.19
IV.GUMA.HNN. ML:2.6 0.00252 0.56 AML other m 2021-10-20T21:06:58.39
IV.GUMA.HHN. ML:2.6 0.0023799999999999997 0.54 AML other m 2021-10-20T21:06:58.67
IV.MML1.EHE. ML:1.7 0.0002965 0.36 AML other m 2021-10-20T21:07:00.24
IV.MML1.HNE. ML:1.7 0.000308 0.36 AML other m 2021-10-20T21:07:00.42
IV.GAVE.EHN. ML:2.4 0.001195 1.08 AML other m 2021-10-20T21:07:00.85
IV.GUMA.HHE. ML:2.6 0.0026950000000000003 0.48 AML other m 2021-10-20T21:07:01.32
IV.GUMA.HNE. ML:2.6 0.002355 0.46 AML other m 2021-10-20T21:07:01.32
IV.MML1.HNN. ML:1.8 0.000407 0.54 AML other m 2021-10-20T21:07:01.22
IV.MML1.EHN. ML:1.8 0.000373 0.88 AML other m 2021-10-20T21:07:01.49
IV.GAVE.EHE. ML:2.3 0.001029 1.1 AML other m 2021-10-20T21:07:01.13
IV.LNSS.HHE. ML:2.0 0.000379 0.72 AML other m 2021-10-20T21:07:02.36
IV.LNSS.HHN. ML:2.2 0.0006535 0.24 AML other m 2021-10-20T21:07:02.38
IV.SNTG.HHE. ML:1.5 0.00011119999999999999 1.06 AML other m 2021-10-20T21:07:03.05
IV.ASSB.HHN. ML:2.1 0.00041349999999999997 0.38 AML other m 2021-10-20T21:07:03.12
IV.SAP2.EHE. ML:2.0 0.000517 0.44 AML other m 2021-10-20T21:07:03.12
IV.SNTG.HHN. ML:1.7 0.0001685 0.7 AML other m 2021-10-20T21:07:03.64
IV.ASSB.HHE. ML:2.0 0.000373 0.92 AML other m 2021-10-20T21:07:03.67
IV.SAP2.EHN. ML:2.7 0.00234 0.5 AML other m 2021-10-20T21:07:03.58
IV.EL6.EHE. ML:2.0 0.0003325 0.58 AML other m 2021-10-20T21:07:04.25
IV.MF5.EHE. ML:2.1 0.0006245000000000001 1.4 AML other m 2021-10-20T21:07:04.74
IV.MF5.EHN. ML:2.0 0.00046300000000000003 0.56 AML other m 2021-10-20T21:07:04.74
IV.EL6.EHN. ML:2.2 0.00048550000000000004 0.26 AML other m 2021-10-20T21:07:05.32
IV.RM33.EHE. ML:1.6 0.00011415 0.96 AML other m 2021-10-20T21:07:05.62
IV.ATCC.EHE. ML:1.9 0.0002405 0.34 AML other m 2021-10-20T21:07:05.97
IV.RM33.EHN. ML:1.8 0.000188 1.66 AML other m 2021-10-20T21:07:06.03
IV.FOSV.EHE. ML:1.7 0.00014150000000000002 0.46 AML other m 2021-10-20T21:07:06.29
IV.FOSV.EHN. ML:1.7 0.00013949999999999998 0.24 AML other m 2021-10-20T21:07:06.15
IV.ATCC.EHN. ML:2.0 0.00028450000000000003 1.12 AML other m 2021-10-20T21:07:06.88
IV.TERO.HHN. ML:1.9 0.00021349999999999999 0.7 AML other m 2021-10-20T21:07:06.27
IV.SMA1.EHN. ML:1.8 0.00023449999999999998 0.56 AML other m 2021-10-20T21:07:06.38
IV.MOMA.HHN. ML:1.9 0.00021050000000000002 0.2 AML other m 2021-10-20T21:07:06.78
IV.CING.HHN. ML:1.8 0.0001455 0.3 AML other m 2021-10-20T21:07:06.71
IV.CING.HHE. ML:1.7 0.000131 0.22 AML other m 2021-10-20T21:07:06.88
IV.OFFI.HHN. ML:2.0 0.000289 0.56 AML other m 2021-10-20T21:07:07.32
IV.MOMA.HHE. ML:2.1 0.00033999999999999997 0.18 AML other m 2021-10-20T21:07:07.37
IV.MOMA.HNE. ML:2.1 0.0003345 0.8 AML other m 2021-10-20T21:07:07.69
IV.MOMA.HNN. ML:2.0 0.00027150000000000004 0.42 AML other m 2021-10-20T21:07:07.41
IV.MNTT.EHN. ML:2.2 0.000518 0.3 AML other m 2021-10-20T21:07:07.37
IV.MNTT.EHE. ML:2.4 0.000904 0.9 AML other m 2021-10-20T21:07:07.99
IV.ARRO.EHE. ML:1.8 0.00017649999999999998 0.2 AML other m 2021-10-20T21:07:07.64
IV.ARRO.EHN. ML:1.7 0.00013450000000000002 1.3 AML other m 2021-10-20T21:07:09.79
IV.MURB.HHE. ML:2.3 0.0003685 0.2 AML other m 2021-10-20T21:07:10.23
IV.MURB.HHN. ML:2.2 0.00029299999999999997 0.18 AML other m 2021-10-20T21:07:10.48
IV.TERO.HHE. ML:1.8 0.00014500000000000003 0.38 AML other m 2021-10-20T21:07:11.39
IV.SMA1.EHE. ML:1.8 0.00023649999999999998 0.42 AML other m 2021-10-20T21:07:13.34
IV.ARVD.HHN. ML:1.3 0.00004015000000000001 1.44 AML other m 2021-10-20T21:07:13.73
IV.ARVD.HHE. ML:1.6 0.00007065000000000001 0.68 AML other m 2021-10-20T21:07:14.54
IV.FRON.EHE. ML:1.6 0.00006645 1.28 AML other m 2021-10-20T21:07:15.99
IV.FRON.EHN. ML:1.7 0.0000746 0.68 AML other m 2021-10-20T21:07:16.93
IV.PIEI.HHE. ML:1.6 0.00004915 0.8 AML other m 2021-10-20T21:07:17.87
IV.OFFI.HHE. ML:1.9 0.0002505 0.84 AML other m 2021-10-20T21:07:18.82
IV.PIEI.HHN. ML:1.4 0.000029699999999999997 0.84 AML other m 2021-10-20T21:07:18.42
IV.ATMI.HHN. ML:1.9 0.00011444999999999999 0.56 AML other m 2021-10-20T21:07:20.46
IV.NARO.HHE. ML:1.4 0.000027950000000000002 0.4 AML other m 2021-10-20T21:07:20.85
IV.SRES.HHN. ML:1.7 0.00006195 1.52 AML other m 2021-10-20T21:07:22.02
IV.SRES.HHE. ML:1.7 0.00006110000000000001 0.72 AML other m 2021-10-20T21:07:22.50
IV.ATMI.HHE. ML:1.9 0.00009665 0.38 AML other m 2021-10-20T21:07:25.42
IV.NARO.HHN. ML:1.4 0.0000286 0.76 AML other m 2021-10-20T21:07:29.16
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
Waveforms Seismic signals in miniseed + resp format Download