Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.6 on date 03-08-2020 and time 22:40:26 (Italy) in region 4 km W Cerreto di Spoleto (PG)

A magnitude ML 1.6 earthquake occured in region: 4 km W Cerreto di Spoleto (PG), on

  • 03-08-2020 20:40:26 (UTC)
  • 03-08-2020 22:40:26 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.8160, 12.8710 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
Cerreto di Spoleto PG 4 1075 1075
Vallo di Nera PG 5 364 1439
Campello sul Clitunno PG 8 2442 3881
Sellano PG 9 1079 4960
Sant'Anatolia di Narco PG 10 564 5524
Scheggino PG 12 461 5985
Trevi PG 12 8469 14454
Poggiodomo PG 13 117 14571
Spoleto PG 14 38218 52789
Preci PG 16 724 53513
Cascia PG 16 3217 56730
Castel Ritaldi PG 16 3278 60008
Norcia PG 18 4957 64965
Monteleone di Spoleto PG 19 599 65564
Montefalco PG 20 5679 71243

Municipalities with at least 50000 inhabitants

An earthquake occurred to
21 Km SE of Foligno (57155 inhabitants)
34 Km NE of Terni (111501 inhabitants)
51 Km SE of Perugia (166134 inhabitants)
67 Km NW of L'Aquila (69753 inhabitants)
70 Km W of Teramo (54892 inhabitants)
77 Km NE of Viterbo (67173 inhabitants)
91 Km N of Guidonia Montecelio (88673 inhabitants)
95 Km N of Tivoli (56533 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 2020-08-03
20:40:26		 42.8162 12.8707 10 2020-11-19
12:37:02		 Bollettino Sismico Italiano INGV 83030571
Reviewed
Rev100 		ML 1.6 2020-08-03
20:40:26		 42.8133 12.8712 10 2020-08-03
20:50:14		 Sala Sismica INGV-Roma 81622811
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-08-03 20:40:26 ± 0.04
Latitude 42.8162 ± 0.0018
Longitude 12.8707 ± 0.0025
Depth (km) 10 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 83030571

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 194
Semi-minor axis of confidence ellipse (meter) 188
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 162
Circular confidence region, given by single value of horizontal uncertainty (meter) 190.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 54
Number of associated phases, regardless of their use for origin computation 51
Number of defining phases 50
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.23
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.53959
Number of stations at which the event was observed 26
Number of stations from which data was used for origin computation 25
Magnitudes information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.3
Num. used stations 32
Type of magnitude ML
Reference to an origin 83030571
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-10-08 09:41:15

ML:1.6

Field Value
Value 1.6
Uncertainty 0.3
Num. used stations 40
Type of magnitude ML
Reference to an origin 81622811
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-08-03 20:50:14
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CPGN.EHZ. 2020-08-03T20:41:03.01 3.0 undecidable manual S -0.09 0
IV.EL6.EHZ. 2020-08-03T20:40:45.62 0.1 undecidable manual S 18 59.8956 50 0.39 86
IV.FOSV.EHZ. 2020-08-03T20:40:43.95 0.3 undecidable manual S 351 53.8017 50 0.35 66
IV.MF5.EHZ. 2020-08-03T20:40:43.87 0.3 undecidable manual S 68 51.5151 50 0.89 55
IV.GUMA.HHZ. 2020-08-03T20:40:42.24 0.1 undecidable manual S 54 46.62 50 0.58 84
IV.ATCC.EHZ. 2020-08-03T20:40:41.50 0.1 undecidable manual S 336 45.0216 50 0.26 91
IV.SMA1.EHZ. 2020-08-03T20:40:41.22 0.1 undecidable manual S 118 43.1235 50 0.48 87
IV.RM33.EHZ. 2020-08-03T20:40:41.04 0.1 undecidable manual S 140 44.1225 50 0.03 95
IV.CSP1.EHZ. 2020-08-03T20:40:40.12 0.1 undecidable manual S 41 40.9257 50 -0.02 96
IV.MMO1.EHZ. 2020-08-03T20:40:39.11 0.1 undecidable manual S 76 38.2284 50 -0.32 91
IV.MML1.HNE. 2020-08-03T20:40:38.13 0.1 undecidable manual S 14 33.9438 50 -0.17 94
IV.SEF1.HNN. 2020-08-03T20:40:38.96 0.1 undecidable manual S 10 37.2294 50 -0.2 93
IV.CESX.HHZ. 2020-08-03T20:40:37.78 0.1 undecidable manual S 225 32.6451 50 -0.16 95
IV.EL6.EHZ. 2020-08-03T20:40:37.22 0.1 undecidable manual P 18 59.8956 50 -0.1 91
IV.ASSB.HHZ. 2020-08-03T20:40:37.13 0.1 undecidable manual S 326 30.4473 50 -0.22 94
IV.FDMO.HHZ. 2020-08-03T20:40:37.15 0.1 undecidable manual S 36 30.1476 50 -0.12 96
IV.MF5.EHZ. 2020-08-03T20:40:36.13 0.3 undecidable manual P 68 51.5151 50 0.11 69
IV.ARRO.EHZ. 2020-08-03T20:40:36.53 0.1 undecidable manual S 198 27.6501 50 -0.08 97
IV.MC2.EHZ. 2020-08-03T20:40:36.58 0.1 undecidable manual S 68 27.9498 50 -0.11 97
IV.LNSS.HHZ. 2020-08-03T20:40:36.16 0.1 undecidable manual S 150 27.4503 50 -0.39 91
IV.FOSV.EHZ. 2020-08-03T20:40:36.60 0.3 undecidable manual P 351 53.8017 50 0.22 68
IV.MOMA.HHZ. 2020-08-03T20:40:35.64 0.1 undecidable manual S 267 24.4533 112 -0.06 98
IT.GNU.HGZ. 2020-08-03T20:40:35.61 0.1 undecidable manual S 267 24.4533 112 -0.09 98
IT.FOPC.HGZ. 2020-08-03T20:40:35.02 0.1 undecidable manual S 321 21.7671 115 0.18 96
IV.GUMA.HHZ. 2020-08-03T20:40:35.50 0.1 undecidable manual P 54 46.62 50 0.23 91
IV.RM33.EHZ. 2020-08-03T20:40:34.70 0.1 undecidable manual P 140 44.1225 50 -0.18 92
IV.ATCC.EHZ. 2020-08-03T20:40:34.91 0.1 negative manual P 336 45.0216 50 -0.12 94
IV.FEMA.HNZ. 2020-08-03T20:40:34.70 0.1 undecidable manual S 42 21.7671 115 -0.13 97
IV.NRCA.HHZ. 2020-08-03T20:40:34.01 0.1 undecidable manual S 84 19.869 117 -0.24 95
IV.SMA1.EHZ. 2020-08-03T20:40:34.88 0.1 undecidable manual P 118 43.1235 50 0.15 93
IT.MTCL.HGZ. 2020-08-03T20:40:34.67 0.1 undecidable manual S 28 22.3554 114 -0.33 93
IV.CESI.HHZ. 2020-08-03T20:40:34.56 0.1 undecidable manual S 7 21.1677 115 -0.06 99
IV.CSP1.EHZ. 2020-08-03T20:40:34.21 0.1 undecidable manual P 41 40.9257 50 -0.17 93
IV.SEF1.HNN. 2020-08-03T20:40:33.98 0.1 undecidable manual P 10 37.2294 50 0.16 94
IV.MMO1.EHZ. 2020-08-03T20:40:33.76 0.1 undecidable manual P 76 38.2284 50 -0.22 93
IV.MML1.HNE. 2020-08-03T20:40:33.17 0.1 undecidable manual P 14 33.9438 50 -0.15 95
IV.ASSB.HHZ. 2020-08-03T20:40:32.59 0.1 negative manual P 326 30.4473 50 -0.19 95
IV.FDMO.HHZ. 2020-08-03T20:40:32.51 0.1 positive manual P 36 30.1476 50 -0.22 94
IV.CESX.HHZ. 2020-08-03T20:40:32.98 0.1 positive manual P 225 32.6451 50 -0.14 95
IV.ARRO.EHZ. 2020-08-03T20:40:32.35 0.1 undecidable manual P 198 27.6501 50 0 99
IV.LNSS.HHZ. 2020-08-03T20:40:32.14 0.1 undecidable manual P 150 27.4503 50 -0.17 96
IV.MC2.EHZ. 2020-08-03T20:40:32.32 0.1 undecidable manual P 68 27.9498 50 -0.07 97
IV.GAVE.EHZ. 2020-08-03T20:40:32.69 0.1 undecidable manual S 172 13.875 126 0.23 96
IT.MTCL.HGZ. 2020-08-03T20:40:31.37 0.1 undecidable manual P 28 22.3554 114 -0.05 99
IV.CESI.HHZ. 2020-08-03T20:40:31.27 0.1 positive manual P 7 21.1677 115 0.07 99
IV.MOMA.HHZ. 2020-08-03T20:40:31.97 0.1 undecidable manual P 267 24.4533 112 0.15 96
IT.GNU.HGZ. 2020-08-03T20:40:31.97 0.1 undecidable manual P 267 24.4533 112 0.15 96
IT.FOPC.HGZ. 2020-08-03T20:40:31.40 0.1 undecidable manual P 321 21.7671 115 0.07 98
IV.FEMA.HNZ. 2020-08-03T20:40:31.36 0.1 undecidable manual P 42 21.7671 115 0.04 99
IV.NRCA.HHZ. 2020-08-03T20:40:30.98 0.1 undecidable manual P 84 19.869 117 -0.01 100
IV.GAVE.EHZ. 2020-08-03T20:40:30.27 0.1 undecidable manual P 172 13.875 126 0.33 95
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.GAVE.HNE. ML:2.2 0.0015087865 0.2176 AML other m 2020-08-03T20:40:32.93
IV.GAVE.EHE. ML:2.2 0.001582025 0.2048 AML other m 2020-08-03T20:40:32.93
IV.GAVE.EHN. ML:2.1 0.001267365 1.8848 AML other m 2020-08-03T20:40:32.02
IV.NRCA.HNE. ML:1.8 0.0005276701000000001 0.1664 AML other m 2020-08-03T20:40:34.19
IV.NRCA.HHE. ML:1.9 0.00056617005 0.1536 AML other m 2020-08-03T20:40:34.20
IV.NRCA.HHN. ML:1.7 0.0003901145 0.0896 AML other m 2020-08-03T20:40:34.17
IV.NRCA.HNN. ML:1.7 0.00035297659999999995 0.0896 AML other m 2020-08-03T20:40:34.17
IV.CESI.HHN. ML:1.9 0.0005852201 0.2432 AML other m 2020-08-03T20:40:34.73
IV.CESI.HNN. ML:1.9 0.0005714356499999999 0.2432 AML other m 2020-08-03T20:40:34.73
IV.LNSS.HHE. ML:1.9 0.0004416768 0.0896 AML other m 2020-08-03T20:40:36.74
IV.LNSS.HNE. ML:1.9 0.00040235005 0.1024 AML other m 2020-08-03T20:40:36.74
IV.ARRO.EHE. ML:1.4 0.0001464666 0.192 AML other m 2020-08-03T20:40:36.77
IV.ASSB.HHN. ML:1.4 0.00012975475 0.1664 AML other m 2020-08-03T20:40:37.27
IV.LNSS.HHN. ML:1.8 0.0003498906 0.1536 AML other m 2020-08-03T20:40:37.20
IV.LNSS.HNN. ML:1.8 0.00031346399999999995 0.1664 AML other m 2020-08-03T20:40:37.21
IV.ASSB.HHE. ML:1.5 0.00014624755 0.1152 AML other m 2020-08-03T20:40:37.41
IV.FDMO.HHE. ML:1.2 0.000085311315 0.1408 AML other m 2020-08-03T20:40:37.82
IV.GUMA.HHE. ML:1.6 0.000106367765 0.2432 AML other m 2020-08-03T20:40:42.68
IV.GUMA.HHN. ML:1.6 0.000116554975 1.6544 AML other m 2020-08-03T20:40:43.92
IV.GAVE.HNN. ML:1.6 0.00040777010000000004 1.8848 AML other m 2020-08-03T20:40:32.96
IV.CESI.HHE. ML:1.8 0.00045875615000000005 1.6416 AML other m 2020-08-03T20:40:34.14
IV.MOMA.HHN. ML:1.5 0.0001992731 0.1408 AML other m 2020-08-03T20:40:36.07
IV.MOMA.HNE. ML:1.6 0.00021460705 0.5888 AML other m 2020-08-03T20:40:36.49
IV.MOMA.HHE. ML:1.6 0.00022952729999999998 0.1664 AML other m 2020-08-03T20:40:36.48
IV.ARRO.EHN. ML:1.3 0.00009902236 0.2304 AML other m 2020-08-03T20:40:36.89
IV.FDMO.HHN. ML:1.0 0.00005180496 0.2048 AML other m 2020-08-03T20:40:37.34
IV.RM33.EHE. ML:1.2 0.00004833217 0.3072 AML other m 2020-08-03T20:40:41.75
IV.RM33.EHN. ML:1.3 0.000056057905000000004 0.2688 AML other m 2020-08-03T20:40:41.20
IV.SMA1.EHE. ML:1.2 0.00005192736 1.3056 AML other m 2020-08-03T20:40:42.20
IV.SMA1.EHN. ML:1.2 0.000046184564999999996 0.1408 AML other m 2020-08-03T20:40:41.96
IV.ATCC.EHN. ML:1.2 0.00004571528 0.256 AML other m 2020-08-03T20:40:41.67
IV.ATCC.EHE. ML:1.4 0.000080772175 0.256 AML other m 2020-08-03T20:40:42.69
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