Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.2 on date 21-08-2020 and time 01:54:39 (UTC) in region 6 km SW Monte Cavallo (MC)

A magnitude ML 1.2 earthquake occured in region: 6 km SW Monte Cavallo (MC), on

  • 21-08-2020 01:54:39 (UTC)
  • 21-08-2020 03:54:39 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.9600, 12.9540 at 11 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
Monte Cavallo MC 6 145 145
Sellano PG 8 1079 1224
Preci PG 11 724 1948
Visso MC 12 1107 3055
Pieve Torina MC 12 1458 4513
Serravalle di Chienti MC 13 1070 5583
Fiordimonte MC 14 202 5785
Ussita MC 15 444 6229
Muccia MC 16 915 7144
Pievebovigliana MC 16 866 8010
Cerreto di Spoleto PG 16 1075 9085
Castelsantangelo sul Nera MC 18 281 9366
Fiastra MC 19 559 9925
Trevi PG 19 8469 18394
Valtopina PG 20 1398 19792
Acquacanina MC 20 121 19913

Municipalities with at least 50000 inhabitants

An earthquake occurred to
20 Km E of Foligno (57155 inhabitants)
49 Km E of Perugia (166134 inhabitants)
51 Km NE of Terni (111501 inhabitants)
70 Km W of Teramo (54892 inhabitants)
77 Km NW of L'Aquila (69753 inhabitants)
86 Km SW of Ancona (100861 inhabitants)
92 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 1.2 2020-08-21
01:54:39		 42.9598 12.9538 11 2020-11-19
12:37:06		 Bollettino Sismico Italiano INGV 84603151
Reviewed
Rev100 		ML 1.2 2020-08-21
01:54:39		 42.9633 12.9558 11 2020-08-21
02:00:06		 Sala Sismica INGV-Roma 82186911
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-08-21 01:54:39 ± 0.04
Latitude 42.9598 ± 0.0018
Longitude 12.9538 ± 0.0037
Depth (km) 11 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 84603151

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 284
Semi-minor axis of confidence ellipse (meter) 230
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 63
Circular confidence region, given by single value of horizontal uncertainty (meter) 280.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 50
Number of associated phases, regardless of their use for origin computation 46
Number of defining phases 46
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) 0.04766
Epicentral distance of station farthest from the epicenter (degree) 0.70507
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:1.2

Field Value
Value 1.2
Uncertainty 0.3
Num. used stations 28
Type of magnitude ML
Reference to an origin 84603151
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-11-10 11:29:19

ML:1.2

Field Value
Value 1.2
Uncertainty 0.3
Num. used stations 28
Type of magnitude ML
Reference to an origin 82186911
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-08-21 02:00:06
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CING.HNE. 2020-08-21T01:54:55.82 0.6 undecidable manual S 23 50.1165 50 0.43 43
IV.ARRO.EHZ. 2020-08-21T01:54:54.22 0.6 undecidable manual S 200 44.9217 50 0.21 45
IV.EL6.EHZ. 2020-08-21T01:54:53.61 0.1 undecidable manual S 16 42.7239 50 0.19 91
IV.NARO.HHZ. 2020-08-21T01:54:53.01 0.3 undecidable manual P 337 78.2661 50 -0.03 66
IV.FOSV.EHZ. 2020-08-21T01:54:52.78 0.3 undecidable manual S 337 40.3263 50 0 71
IV.PIEI.HHZ. 2020-08-21T01:54:51.84 0.3 undecidable manual P 332 72.2721 50 -0.28 64
IV.MOMA.HHZ. 2020-08-21T01:54:51.78 0.6 undecidable manual S 241 35.6421 50 0.24 46
IV.ATCC.EHZ. 2020-08-21T01:54:51.95 0.6 undecidable manual S 315 35.6421 50 0.41 44
IV.GAVE.EHZ. 2020-08-21T01:54:50.08 0.6 undecidable manual S 189 30.0477 50 0.03 48
IV.MNTT.EHZ. 2020-08-21T01:54:50.22 0.3 undecidable manual P 77 53.3022 50 1.03 50
IV.MMO1.EHZ. 2020-08-21T01:54:50.13 0.6 undecidable manual S 102 31.0467 50 -0.17 47
IV.FRON.EHZ. 2020-08-21T01:54:50.87 0.3 undecidable manual P 343 64.5909 50 -0.06 68
IV.SNTG.HHZ. 2020-08-21T01:54:50.89 0.3 undecidable manual S 358 32.745 50 0.12 71
IV.ARVD.HHZ. 2020-08-21T01:54:50.11 0.1 undecidable manual P 359 59.6958 50 -0.07 91
IV.RM33.EHZ. 2020-08-21T01:54:49.36 0.3 undecidable manual P 157 54.3012 50 0.01 70
IV.ATFO.HHZ. 2020-08-21T01:54:49.44 0.3 undecidable manual P 326 54.7008 50 0.03 69
IV.SSFR.HHZ. 2020-08-21T01:54:49.28 0.3 undecidable manual P 345 54.6009 50 -0.12 68
IV.CING.HNE. 2020-08-21T01:54:48.61 0.1 undecidable manual P 23 50.1165 50 -0.09 92
IV.MURB.HHZ. 2020-08-21T01:54:48.47 0.1 undecidable manual P 314 48.3183 50 0.04 93
IV.CESX.HHZ. 2020-08-21T01:54:48.52 0.3 undecidable manual P 218 49.1175 50 -0.03 70
IV.SMA1.EHZ. 2020-08-21T01:54:48.32 0.3 undecidable manual P 140 47.9187 50 -0.05 70
IV.ASSB.HHZ. 2020-08-21T01:54:48.75 0.3 undecidable manual S 291 25.6521 50 -0.11 72
IV.EL6.EHZ. 2020-08-21T01:54:47.45 0.1 undecidable manual P 16 42.7239 50 -0.11 93
IV.MF5.EHZ. 2020-08-21T01:54:47.83 0.3 undecidable manual P 86 41.2254 50 0.51 64
IV.MC2.EHZ. 2020-08-21T01:54:47.34 0.3 undecidable manual S 106 19.869 50 0.02 74
IV.ARRO.EHZ. 2020-08-21T01:54:47.75 0.3 undecidable manual P 200 44.9217 50 -0.15 69
IV.MML1.EHZ. 2020-08-21T01:54:46.47 0.3 undecidable manual S 5 17.0718 50 -0.12 73
IV.ATCC.EHZ. 2020-08-21T01:54:46.44 0.1 undecidable manual P 315 35.6421 50 -0.03 95
IV.NRCA.HNZ. 2020-08-21T01:54:46.82 0.3 undecidable manual S 137 19.1697 50 -0.31 70
IV.MOMA.HHZ. 2020-08-21T01:54:46.74 0.3 undecidable manual P 241 35.6421 50 0.27 68
IV.FOSV.EHZ. 2020-08-21T01:54:46.96 0.1 undecidable manual P 337 40.3263 50 -0.23 91
IV.SNTG.HHZ. 2020-08-21T01:54:45.81 0.3 undecidable manual P 358 32.745 50 -0.22 69
IV.GAVE.EHZ. 2020-08-21T01:54:45.52 0.1 undecidable manual P 189 30.0477 50 -0.09 95
IV.MMO1.EHZ. 2020-08-21T01:54:45.58 0.1 undecidable manual P 102 31.0467 50 -0.18 93
IV.FDMO.HHZ. 2020-08-21T01:54:45.38 0.1 undecidable manual S 52 13.7751 129 -0.3 94
IV.MC2.EHZ. 2020-08-21T01:54:44.11 0.3 undecidable manual P 106 19.869 50 0.08 73
IV.ASSB.HHZ. 2020-08-21T01:54:44.76 0.1 undecidable manual P 291 25.6521 50 -0.17 94
IV.CESI.HHZ. 2020-08-21T01:54:44.03 0.1 undecidable manual S 321 6.3936 150 0.05 100
IV.FEMA.HNE. 2020-08-21T01:54:44.35 0.1 undecidable manual S 88 7.7811 145 0.11 99
IT.MTCL.HGZ. 2020-08-21T01:54:43.70 0.1 undecidable manual S 44 5.2947 154 -0.1 99
IV.FDMO.HHZ. 2020-08-21T01:54:43.07 0.1 undecidable manual P 52 13.7751 129 -0.02 99
IV.MML1.EHZ. 2020-08-21T01:54:43.56 0.1 undecidable manual P 5 17.0718 50 -0.05 98
IV.NRCA.HNZ. 2020-08-21T01:54:43.79 0.1 undecidable manual P 137 19.1697 50 -0.14 96
IV.FEMA.HNE. 2020-08-21T01:54:42.41 0.1 undecidable manual P 88 7.7811 145 0.15 98
IT.MTCL.HGZ. 2020-08-21T01:54:42.07 0.1 undecidable manual P 44 5.2947 154 0.07 100
IV.CESI.HHZ. 2020-08-21T01:54:42.28 0.1 undecidable manual P 321 6.3936 150 0.17 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CESI.HHN. ML:1.7 0.0007555000000000001 0.16 AML other m 2020-08-21T01:54:44.25
IV.CESI.HHE. ML:1.6 0.0006115 0.22 AML other m 2020-08-21T01:54:44.24
IV.FDMO.HHN. ML:1.6 0.00036199999999999996 0.22 AML other m 2020-08-21T01:54:45.66
IV.FDMO.HHE. ML:1.6 0.00035499999999999996 1.84 AML other m 2020-08-21T01:54:46.99
IV.NRCA.HHN. ML:1.8 0.000497 0.08 AML other m 2020-08-21T01:54:47.07
IV.NRCA.HHE. ML:1.8 0.00047050000000000005 0.36 AML other m 2020-08-21T01:54:47.87
IV.ASSB.HHN. ML:1.2 0.00009345000000000001 1.66 AML other m 2020-08-21T01:54:48.94
IV.ASSB.HHE. ML:1.2 0.00009315 0.54 AML other m 2020-08-21T01:54:49.85
IV.GAVE.EHE. ML:1.4 0.0001305 0.88 AML other m 2020-08-21T01:54:51.45
IV.GAVE.EHN. ML:1.2 0.00008375 0.86 AML other m 2020-08-21T01:54:51.13
IV.SNTG.HHE. ML:1.0 0.0000454 0.74 AML other m 2020-08-21T01:54:51.47
IV.SNTG.HHN. ML:1.1 0.0000579 1.1 AML other m 2020-08-21T01:54:52.57
IV.ATCC.EHE. ML:1.1 0.0000466 0.3 AML other m 2020-08-21T01:54:52.17
IV.ATCC.EHN. ML:1.0 0.000041700000000000004 1.5 AML other m 2020-08-21T01:54:52.19
IV.MOMA.HHE. ML:1.2 0.000055849999999999996 0.52 AML other m 2020-08-21T01:54:52.86
IV.MOMA.HHN. ML:1.1 0.000050900000000000004 1.8 AML other m 2020-08-21T01:54:53.99
IV.ARRO.EHE. ML:1.2 0.000048849999999999995 0.26 AML other m 2020-08-21T01:54:54.97
IV.ARRO.EHN. ML:0.9 0.000027099999999999998 0.18 AML other m 2020-08-21T01:54:55.44
IV.PIEI.HHN. ML:0.8 0.0000105 0.46 AML other m 2020-08-21T01:54:55.56
IV.MURB.HHE. ML:1.2 0.0000462 1.38 AML other m 2020-08-21T01:54:56.26
IV.CESX.HHE. ML:1.1 0.000033 0.76 AML other m 2020-08-21T01:54:56.87
IV.CESX.HHN. ML:1.0 0.000026450000000000003 0.6 AML other m 2020-08-21T01:54:57.30
IV.SMA1.EHN. ML:1.0 0.000024149999999999997 0.42 AML other m 2020-08-21T01:54:58.33
IV.MURB.HHN. ML:1.3 0.000049500000000000004 0.42 AML other m 2020-08-21T01:54:59.11
IV.SSFR.HHN. ML:1.2 0.000034450000000000004 0.26 AML other m 2020-08-21T01:54:59.28
IV.SMA1.EHE. ML:1.0 0.00002665 0.82 AML other m 2020-08-21T01:55:00.45
IV.SSFR.HHE. ML:1.2 0.00003705 0.14 AML other m 2020-08-21T01:55:01.03
IV.PIEI.HHE. ML:0.8 0.00000919 1.28 AML other m 2020-08-21T01:55:03.64
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