Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.8 on date 24-08-2020 and time 21:40:08 (UTC) in region 5 km W Visso (MC)

A magnitude ML 1.8 earthquake occured in region: 5 km W Visso (MC), on

  • 24-08-2020 21:40:08 (UTC)
  • 24-08-2020 23:40:08 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.9520, 13.0350 at 7 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 5 1107 1107
Monte Cavallo MC 5 145 1252
Preci PG 8 724 1976
Ussita MC 9 444 2420
Pieve Torina MC 10 1458 3878
Fiordimonte MC 11 202 4080
Sellano PG 11 1079 5159
Castelsantangelo sul Nera MC 12 281 5440
Pievebovigliana MC 13 866 6306
Fiastra MC 14 559 6865
Acquacanina MC 14 121 6986
Muccia MC 15 915 7901
Serravalle di Chienti MC 15 1070 8971
Bolognola MC 16 142 9113
Cerreto di Spoleto PG 18 1075 10188
Norcia PG 18 4957 15145

Municipalities with at least 50000 inhabitants

An earthquake occurred to
27 Km E of Foligno (57155 inhabitants)
54 Km NE of Terni (111501 inhabitants)
55 Km E of Perugia (166134 inhabitants)
64 Km NW of Teramo (54892 inhabitants)
73 Km NW of L'Aquila (69753 inhabitants)
84 Km SW of Ancona (100861 inhabitants)
96 Km NE of Viterbo (67173 inhabitants)
99 Km S of Fano (60888 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 1.8 2020-08-24
21:40:08		 42.9522 13.0353 7 2020-11-19
12:37:06		 Bollettino Sismico Italiano INGV 84607491
Reviewed
Rev100 		ML 1.8 2020-08-24
21:40:09		 42.9583 13.0465 5 2020-08-24
21:49:36		 Sala Sismica INGV-Roma 82297111
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-08-24 21:40:08 ± 0.05
Latitude 42.9522 ± 0.0036
Longitude 13.0353 ± 0.0049
Depth (km) 7 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 84607491

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 349
Semi-minor axis of confidence ellipse (meter) 268
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 44
Circular confidence region, given by single value of horizontal uncertainty (meter) 350.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 41
Number of associated phases, regardless of their use for origin computation 45
Number of defining phases 45
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.28
Epicentral distance of station closest to the epicenter (degree) 0.01439
Epicentral distance of station farthest from the epicenter (degree) 0.70597
Number of stations at which the event was observed 29
Number of stations from which data was used for origin computation 29
Magnitudes information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.3
Num. used stations 46
Type of magnitude ML
Reference to an origin 82297111
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-08-24 21:49:36

ML:1.8

Field Value
Value 1.8
Uncertainty 0.3
Num. used stations 46
Type of magnitude ML
Reference to an origin 84607491
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-11-10 14:33:25
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ATCC.EHZ. 2020-08-24T21:40:23.30 0.6 undecidable manual S 309 41.1255 50 0.29 45
IV.SMA1.EHZ. 2020-08-24T21:40:23.51 0.6 undecidable manual S 146 43.2234 50 -0.06 47
IV.MPAG.EHZ. 2020-08-24T21:40:22.76 0.3 undecidable manual P 344 78.366 50 0.06 66
IV.PIEI.HHZ. 2020-08-24T21:40:22.34 0.3 undecidable manual P 328 76.2681 50 -0.05 66
IV.ATVO.HHZ. 2020-08-24T21:40:21.30 0.3 undecidable manual P 313 69.6747 50 -0.08 67
IV.MF5.EHZ. 2020-08-24T21:40:21.80 0.6 undecidable manual S 83 34.6431 102 0.78 39
IV.FRON.EHZ. 2020-08-24T21:40:20.94 0.3 undecidable manual P 338 67.5768 50 -0.1 67
IV.GAVE.EHZ. 2020-08-24T21:40:20.28 0.6 undecidable manual S 202 31.0467 103 0.5 44
IV.ASSB.HHZ. 2020-08-24T21:40:20.35 0.6 undecidable manual S 288 32.1456 103 0.19 46
IV.ARVD.HHZ. 2020-08-24T21:40:19.76 0.3 undecidable manual P 353 60.9945 50 -0.28 65
IV.GUMA.HHZ. 2020-08-24T21:40:19.00 0.3 undecidable manual S 63 27.2505 105 0.5 66
IV.ATFO.HHZ. 2020-08-24T21:40:19.68 0.3 undecidable manual P 321 59.3961 50 -0.09 68
IV.SSFR.HHZ. 2020-08-24T21:40:19.36 0.3 undecidable manual P 339 57.498 50 -0.12 68
IV.MURB.HHZ. 2020-08-24T21:40:18.97 0.3 undecidable manual P 310 53.8017 50 0.04 69
IV.MNTT.EHZ. 2020-08-24T21:40:18.51 0.3 undecidable manual P 75 47.0196 50 0.63 61
IV.CESX.HHZ. 2020-08-24T21:40:18.57 0.3 undecidable manual P 224 52.8027 50 -0.19 67
IV.RM33.EHZ. 2020-08-24T21:40:18.07 0.3 undecidable manual P 163 51.3153 50 -0.46 64
IV.MMO1.EHZ. 2020-08-24T21:40:17.33 0.6 undecidable manual S 104 24.3534 107 -0.22 47
IV.ARRO.EHZ. 2020-08-24T21:40:17.98 0.3 undecidable manual P 208 46.8198 50 0.13 69
IV.SEF1.HNE. 2020-08-24T21:40:17.24 0.6 undecidable manual S 342 22.755 108 0.24 47
IV.MOMA.HHZ. 2020-08-24T21:40:16.81 0.3 undecidable manual P 247 41.2254 50 -0.17 69
IV.CSP1.EHZ. 2020-08-24T21:40:16.12 0.6 undecidable manual S 42 20.7681 109 -0.22 47
IV.ATCC.EHZ. 2020-08-24T21:40:16.72 0.1 undecidable manual P 309 41.1255 50 -0.25 90
IV.SMA1.EHZ. 2020-08-24T21:40:16.73 0.1 undecidable manual P 146 43.2234 50 -0.56 83
IV.ASSB.HHZ. 2020-08-24T21:40:15.24 0.1 undecidable manual P 288 32.1456 103 -0.08 95
IV.MML1.EHN. 2020-08-24T21:40:15.80 0.6 undecidable manual S 344 18.6702 111 0.14 48
IV.MF5.EHZ. 2020-08-24T21:40:15.92 0.1 undecidable manual P 83 34.6431 102 0.1 94
IV.GAVE.EHZ. 2020-08-24T21:40:15.27 0.3 undecidable manual P 202 31.0467 103 0.17 70
IV.SEF1.HNE. 2020-08-24T21:40:14.24 0.3 undecidable manual P 342 22.755 108 0.74 60
IV.MC2.EHZ. 2020-08-24T21:40:14.11 0.3 undecidable manual S 110 13.2756 119 0.14 73
IV.GUMA.HHZ. 2020-08-24T21:40:14.51 0.1 positive manual P 63 27.2505 105 0.14 95
IV.CESI.HHZ. 2020-08-24T21:40:14.09 0.3 undecidable manual S 299 12.0768 121 0.48 68
IV.NRCA.HHZ. 2020-08-24T21:40:14.73 0.6 undecidable manual S 154 14.6742 116 0.34 46
IV.MMO1.EHZ. 2020-08-24T21:40:13.67 0.1 undecidable manual P 104 24.3534 107 -0.15 95
IV.CSP1.EHZ. 2020-08-24T21:40:13.05 0.1 undecidable manual P 42 20.7681 109 -0.07 97
IV.FDMO.HHZ. 2020-08-24T21:40:12.75 0.3 undecidable manual S 24 10.2786 125 -0.33 70
IV.NRCA.HHZ. 2020-08-24T21:40:12.20 0.1 negative manual P 154 14.6742 116 0.21 95
IV.MML1.EHN. 2020-08-24T21:40:12.72 0.3 undecidable manual P 344 18.6702 111 0 74
IV.CESI.HHZ. 2020-08-24T21:40:11.96 0.1 positive manual P 299 12.0768 121 0.41 92
IV.FDMO.HHZ. 2020-08-24T21:40:11.13 0.1 undecidable manual P 24 10.2786 125 -0.1 98
IV.MC2.EHZ. 2020-08-24T21:40:11.92 0.1 undecidable manual P 110 13.2756 119 0.17 96
IT.MTCL.HGZ. 2020-08-24T21:40:11.44 0.6 undecidable manual S 328 5.4945 143 -0.43 46
IT.MTCL.HGZ. 2020-08-24T21:40:10.48 0.1 undecidable manual P 328 5.4945 143 -0.06 100
IV.FEMA.HNZ. 2020-08-24T21:40:10.20 0.3 undecidable manual S 47 1.5984 167 -1.1 53
IV.FEMA.HNZ. 2020-08-24T21:40:09.79 0.1 undecidable manual P 47 1.5984 167 -0.42 93
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FDMO.HHN. ML:2.2 0.002105 0.2 AML other m 2020-08-24T21:40:13.00
IV.FDMO.HHE. ML:2.0 0.0016099999999999999 0.24 AML other m 2020-08-24T21:40:13.05
IV.CESI.HHN. ML:2.2 0.0019299999999999999 0.44 AML other m 2020-08-24T21:40:14.73
IV.CESI.HHE. ML:1.9 0.0009584999999999999 0.7 AML other m 2020-08-24T21:40:15.71
IV.NRCA.HNN. ML:2.2 0.001635 0.22 AML other m 2020-08-24T21:40:15.44
IV.NRCA.HHN. ML:2.2 0.00171 0.22 AML other m 2020-08-24T21:40:15.44
IV.NRCA.HHE. ML:2.1 0.001425 0.14 AML other m 2020-08-24T21:40:15.86
IV.NRCA.HNE. ML:2.1 0.001395 0.12 AML other m 2020-08-24T21:40:15.87
IV.GUMA.HHN. ML:2.5 0.00183 0.22 AML other m 2020-08-24T21:40:19.37
IV.GUMA.HHE. ML:2.3 0.0011200000000000001 0.44 AML other m 2020-08-24T21:40:20.55
IV.GAVE.EHE. ML:2.2 0.000744 1.1 AML other m 2020-08-24T21:40:20.58
IV.ASSB.HHE. ML:2.0 0.000437 0.24 AML other m 2020-08-24T21:40:20.82
IV.GAVE.EHN. ML:2.1 0.000589 0.66 AML other m 2020-08-24T21:40:21.08
IV.ASSB.HHN. ML:2.0 0.000468 1.18 AML other m 2020-08-24T21:40:22.63
IV.MF5.EHN. ML:2.0 0.0003985 0.22 AML other m 2020-08-24T21:40:22.84
IV.MF5.EHE. ML:2.1 0.0005285 0.68 AML other m 2020-08-24T21:40:22.85
IV.MOMA.HHE. ML:1.7 0.000155 0.16 AML other m 2020-08-24T21:40:24.77
IV.MOMA.HHN. ML:1.6 0.0001205 0.32 AML other m 2020-08-24T21:40:24.72
IV.ARRO.EHN. ML:1.7 0.000142 0.2 AML other m 2020-08-24T21:40:25.73
IV.ARRO.EHE. ML:1.6 0.0001275 0.16 AML other m 2020-08-24T21:40:26.20
IV.SMA1.EHN. ML:1.6 0.00013450000000000002 1.02 AML other m 2020-08-24T21:40:26.51
IV.ATCC.EHN. ML:1.8 0.0001945 0.42 AML other m 2020-08-24T21:40:26.53
IV.ATCC.EHE. ML:1.8 0.0001915 1.2 AML other m 2020-08-24T21:40:27.28
IV.CESX.HHE. ML:1.7 0.000124 0.64 AML other m 2020-08-24T21:40:27.24
IV.RM33.EHN. ML:1.6 0.000091 0.26 AML other m 2020-08-24T21:40:27.65
IV.RM33.EHE. ML:1.7 0.000125 0.52 AML other m 2020-08-24T21:40:28.85
IV.CESX.HHN. ML:1.6 0.0001088 0.24 AML other m 2020-08-24T21:40:28.76
IV.MURB.HHE. ML:2.0 0.000245 0.3 AML other m 2020-08-24T21:40:29.22
IV.MURB.HHN. ML:2.0 0.00023099999999999998 0.18 AML other m 2020-08-24T21:40:29.75
IV.MNTT.EHE. ML:2.1 0.000388 0.88 AML other m 2020-08-24T21:40:29.43
IV.ATFO.HHE. ML:1.3 0.000044899999999999994 0.72 AML other m 2020-08-24T21:40:30.43
IV.SSFR.HHE. ML:2.0 0.00024349999999999998 0.18 AML other m 2020-08-24T21:40:30.44
IV.SSFR.HHN. ML:1.8 0.00015050000000000003 0.14 AML other m 2020-08-24T21:40:30.64
IV.ARVD.HHE. ML:1.5 0.00006595 1.34 AML other m 2020-08-24T21:40:30.68
IV.ARVD.HHN. ML:1.4 0.0000435 1.46 AML other m 2020-08-24T21:40:30.06
IV.SMA1.EHE. ML:1.7 0.00014800000000000002 0.74 AML other m 2020-08-24T21:40:31.91
IV.ATFO.HHN. ML:1.4 0.000047799999999999996 1.22 AML other m 2020-08-24T21:40:31.35
IV.FRON.EHN. ML:1.7 0.00007939999999999999 0.62 AML other m 2020-08-24T21:40:32.64
IV.ATVO.HHE. ML:1.3 0.00003645 0.68 AML other m 2020-08-24T21:40:33.78
IV.MNTT.EHN. ML:2.1 0.000391 0.62 AML other m 2020-08-24T21:40:34.26
IV.FRON.EHE. ML:1.4 0.000043700000000000005 0.74 AML other m 2020-08-24T21:40:35.11
IV.PIEI.HHE. ML:1.3 0.0000286 0.5 AML other m 2020-08-24T21:40:35.29
IV.ATVO.HHN. ML:1.3 0.00003430000000000001 0.92 AML other m 2020-08-24T21:40:36.62
IV.PIEI.HHN. ML:1.4 0.00003815 0.56 AML other m 2020-08-24T21:40:36.47
IV.MPAG.EHE. ML:1.3 0.000028700000000000003 0.48 AML other m 2020-08-24T21:40:37.94
IV.MPAG.EHN. ML:1.4 0.00003759999999999999 1.12 AML other m 2020-08-24T21:40:38.22
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