Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.8 on date 20-08-2020 and time 08:07:10 (Italy) in region 6 km SW Arquata del Tronto (AP)

A magnitude ML 1.8 earthquake occured in region: 6 km SW Arquata del Tronto (AP), on

  • 20-08-2020 06:07:10 (UTC)
  • 20-08-2020 08:07:10 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.7480, 13.2390 at 8 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
Arquata del Tronto AP 6 1178 1178
Accumoli RI 6 667 1845
Norcia PG 13 4957 6802
Montegallo AP 13 523 7325
Amatrice RI 14 2657 9982
Acquasanta Terme AP 14 2916 12898
Cittareale RI 16 482 13380
Castelsantangelo sul Nera MC 18 281 13661
Montemonaco AP 19 604 14265
Cascia PG 19 3217 17482

Municipalities with at least 50000 inhabitants

An earthquake occurred to
39 Km W of Teramo (54892 inhabitants)
46 Km N of L'Aquila (69753 inhabitants)
49 Km E of Foligno (57155 inhabitants)
53 Km E of Terni (111501 inhabitants)
79 Km W of Montesilvano (53738 inhabitants)
80 Km SE of Perugia (166134 inhabitants)
86 Km W of Pescara (121014 inhabitants)
88 Km NW of Chieti (51815 inhabitants)
93 Km NE of Guidonia Montecelio (88673 inhabitants)
94 Km NE of Tivoli (56533 inhabitants)
99 Km S of Ancona (100861 inhabitants)
100 Km E 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 1.8 2020-08-20
06:07:10		 42.7475 13.2387 8 2020-11-19
12:37:05		 Bollettino Sismico Italiano INGV 83930031
Reviewed
Rev100 		ML 1.8 2020-08-20
06:07:10		 42.743 13.239 7 2020-08-20
06:35:34		 Sala Sismica INGV-Roma 82167371
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-08-20 06:07:10 ± 0.05
Latitude 42.7475 ± 0.0027
Longitude 13.2387 ± 0.0037
Depth (km) 8 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 83930031

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 260
Semi-minor axis of confidence ellipse (meter) 257
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 239
Circular confidence region, given by single value of horizontal uncertainty (meter) 260.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 34
Number of associated phases, regardless of their use for origin computation 61
Number of defining phases 58
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) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.61873
Number of stations at which the event was observed 34
Number of stations from which data was used for origin computation 31
Magnitudes information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.3
Num. used stations 42
Type of magnitude ML
Reference to an origin 83930031
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-10-20 01:09:53

ML:1.8

Field Value
Value 1.8
Uncertainty 0.3
Num. used stations 42
Type of magnitude ML
Reference to an origin 82167371
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-08-20 06:35:34
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CSNT.HHZ. 2020-08-20T06:08:03.62 3.0 undecidable manual Sg 2.53 0
IV.ROSPO.HHZ. 2020-08-20T06:07:54.34 3.0 undecidable manual S -0.71 0
IV.MCIV.CHZ. 2020-08-20T06:07:51.04 3.0 undecidable manual S 0.93 0
IV.ATCC.EHZ. 2020-08-20T06:07:32.90 0.6 undecidable manual S 315 68.6757 50 0.53 41
IV.EL6.EHZ. 2020-08-20T06:07:32.30 0.3 undecidable manual S 350 65.49 50 0.78 55
IV.ASSB.HHZ. 2020-08-20T06:07:29.70 0.3 undecidable manual S 305 57.3981 50 0.35 65
IV.MOMA.HHZ. 2020-08-20T06:07:29.30 0.6 undecidable manual S 277 54.8007 50 0.64 40
IV.FIAM.HHZ. 2020-08-20T06:07:28.20 0.6 undecidable manual S 191 54.1014 50 -0.28 44
IV.CESX.HHZ. 2020-08-20T06:07:28.60 0.3 undecidable manual S 254 55.3002 50 -0.21 67
IV.MDAR.HNN. 2020-08-20T06:07:27.69 0.3 undecidable manual S 351 50.0166 50 0.31 66
IV.MML1.HNE. 2020-08-20T06:07:26.40 0.6 undecidable manual S 332 46.0206 50 0.08 47
IV.GIGS.HHN. 2020-08-20T06:07:25.30 0.1 undecidable manual S 140 42.5241 50 -0.09 94
IV.SAP2.EHE. 2020-08-20T06:07:25.70 0.1 undecidable manual S 19 40.8258 50 0.75 78
IV.ARRO.EHZ. 2020-08-20T06:07:25.40 0.6 undecidable manual S 244 42.8238 50 -0.08 47
IV.PF6.EHN. 2020-08-20T06:07:25.20 0.1 undecidable manual S 355 43.4232 50 -0.44 87
IV.CESI.HHE. 2020-08-20T06:07:24.10 0.6 undecidable manual S 317 39.4272 50 -0.45 44
IV.GUMA.HHZ. 2020-08-20T06:07:23.90 0.6 undecidable manual S 13 35.8419 50 0.3 46
IV.MF5.EHZ. 2020-08-20T06:07:23.30 0.6 undecidable manual S 34 32.1456 104 0.9 37
IV.ATCC.EHZ. 2020-08-20T06:07:23.36 0.6 undecidable manual P 315 68.6757 50 0.06 45
IV.VCEL.EHZ. 2020-08-20T06:07:22.92 0.6 undecidable manual P 128 62.8926 50 0.52 41
IV.EL6.EHZ. 2020-08-20T06:07:22.59 0.3 undecidable manual P 350 65.49 50 -0.22 66
IV.FDMO.HHZ. 2020-08-20T06:07:22.50 0.6 undecidable manual S 339 34.3434 103 -0.64 41
IV.ASSB.HHZ. 2020-08-20T06:07:21.44 0.3 undecidable manual P 305 57.3981 50 -0.12 68
IV.GAVE.EHZ. 2020-08-20T06:07:21.50 0.6 undecidable manual S 258 28.749 106 0.25 47
IV.MOMA.HHZ. 2020-08-20T06:07:21.43 0.6 positive manual P 277 54.8007 50 0.27 44
IV.FEMA.HNE. 2020-08-20T06:07:21.00 0.1 undecidable manual S 327 28.3494 106 -0.12 96
IV.TERO.HHZ. 2020-08-20T06:07:21.80 0.6 undecidable manual S 115 32.8449 104 -0.83 38
IV.FIAM.HHZ. 2020-08-20T06:07:20.78 0.6 undecidable manual P 191 54.1014 50 -0.27 44
IV.MDAR.HNN. 2020-08-20T06:07:20.72 0.6 undecidable manual P 351 50.0166 50 0.3 44
IV.MNTT.EHZ. 2020-08-20T06:07:20.19 1.0 negative manual P 40 45.4212 50 0.49 22
IV.RM33.EHZ. 2020-08-20T06:07:20.50 0.6 undecidable manual S 184 26.5512 107 -0.02 49
IV.CESX.HHZ. 2020-08-20T06:07:20.87 0.1 undecidable manual P 254 55.3002 50 -0.37 87
IV.MML1.HNE. 2020-08-20T06:07:19.51 0.1 negative manual P 332 46.0206 50 -0.29 90
IV.ARRO.EHZ. 2020-08-20T06:07:19.00 0.6 positive manual P 244 42.8238 50 -0.32 45
IV.SAP2.EHE. 2020-08-20T06:07:19.07 0.1 undecidable manual P 19 40.8258 50 0.06 95
IV.OFFI.HHZ. 2020-08-20T06:07:19.47 0.3 undecidable manual P 60 41.9247 50 0.3 68
IV.LNSS.HHZ. 2020-08-20T06:07:19.70 0.3 undecidable manual S 225 22.755 109 0.41 68
IV.PF6.EHN. 2020-08-20T06:07:18.94 0.1 undecidable manual P 355 43.4232 50 -0.47 87
IV.MC2.EHZ. 2020-08-20T06:07:18.00 0.3 undecidable manual S 347 18.6702 113 0.06 74
IV.GIGS.HHN. 2020-08-20T06:07:18.85 0.1 undecidable manual P 140 42.5241 50 -0.42 88
IV.GUMA.HHZ. 2020-08-20T06:07:18.19 0.1 positive manual P 13 35.8419 50 -0.05 96
IV.CESI.HHE. 2020-08-20T06:07:18.50 0.1 undecidable manual P 317 39.4272 50 -0.28 91
IV.MF5.EHZ. 2020-08-20T06:07:17.57 0.1 positive manual P 34 32.1456 104 0.03 97
IV.TERO.HHZ. 2020-08-20T06:07:17.22 0.3 undecidable manual P 115 32.8449 104 -0.46 66
IV.FDMO.HHZ. 2020-08-20T06:07:17.57 0.6 undecidable manual P 339 34.3434 103 -0.4 45
IV.MMO1.EHZ. 2020-08-20T06:07:17.70 0.3 undecidable manual S 23 18.2706 114 -0.14 73
IT.MTCL.HGZ. 2020-08-20T06:07:17.44 0.1 undecidable manual P 325 33.5442 103 -0.38 90
IV.SMA1.EHZ. 2020-08-20T06:07:16.90 0.6 undecidable manual S 149 15.1737 118 0.04 50
IV.MTRA.HNZ. 2020-08-20T06:07:16.00 0.6 undecidable manual S 85 12.876 122 -0.18 49
IV.FEMA.HNE. 2020-08-20T06:07:16.53 0.1 undecidable manual P 327 28.3494 106 -0.27 93
IV.NRCA.HHZ. 2020-08-20T06:07:16.50 0.6 undecidable manual S 313 13.875 120 0.02 50
IV.T1299.HNN. 2020-08-20T06:07:16.80 0.6 undecidable manual S 164 13.0758 122 0.58 44
IV.GAVE.EHZ. 2020-08-20T06:07:16.86 0.1 positive manual P 258 28.749 106 -0.02 98
IV.RM33.EHZ. 2020-08-20T06:07:16.46 0.1 positive manual P 184 26.5512 107 0 98
IV.LNSS.HHZ. 2020-08-20T06:07:15.97 0.1 positive manual P 225 22.755 109 0.23 95
IV.MC2.EHZ. 2020-08-20T06:07:15.09 0.1 positive manual P 347 18.6702 113 0.12 97
IV.T1299.HNN. 2020-08-20T06:07:14.42 0.1 negative manual P 164 13.0758 122 0.45 92
IV.MMO1.EHZ. 2020-08-20T06:07:14.85 0.1 positive manual P 23 18.2706 114 -0.06 99
IV.SMA1.EHZ. 2020-08-20T06:07:14.53 0.1 negative manual P 149 15.1737 118 0.19 97
IV.NRCA.HHZ. 2020-08-20T06:07:14.29 0.1 positive manual P 313 13.875 120 0.17 97
IV.MTRA.HNZ. 2020-08-20T06:07:13.99 0.1 undecidable manual P 85 12.876 122 0.04 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MTRA.EHE. ML:1.9 0.0009459999999999999 0.72 AML other m 2020-08-20T06:07:16.91
IV.NRCA.HNN. ML:2.1 0.00127 1.52 AML other m 2020-08-20T06:07:17.22
IV.NRCA.HHN. ML:2.0 0.00124 1.5 AML other m 2020-08-20T06:07:17.23
IV.NRCA.HNE. ML:1.9 0.0009545 0.42 AML other m 2020-08-20T06:07:17.26
IV.NRCA.HHE. ML:2.0 0.001095 0.44 AML other m 2020-08-20T06:07:17.26
IV.MTRA.EHN. ML:2.0 0.0010635 0.66 AML other m 2020-08-20T06:07:17.50
IV.MTRA.HNN. ML:1.9 0.0010220000000000001 0.66 AML other m 2020-08-20T06:07:17.50
IV.MTRA.HNE. ML:1.9 0.0009465 0.9 AML other m 2020-08-20T06:07:17.83
IV.LNSS.HHE. ML:2.1 0.000905 1.7 AML other m 2020-08-20T06:07:20.00
IV.LNSS.HHN. ML:2.0 0.000776 0.2 AML other m 2020-08-20T06:07:20.28
IV.RM33.EHN. ML:1.7 0.0003115 0.34 AML other m 2020-08-20T06:07:21.76
IV.GAVE.EHE. ML:2.2 0.0008900000000000001 1.86 AML other m 2020-08-20T06:07:21.02
IV.TERO.HHN. ML:2.0 0.000484 1.7 AML other m 2020-08-20T06:07:21.14
IV.SMA1.EHN. ML:1.7 0.0005325 0.42 AML other m 2020-08-20T06:07:22.04
IV.TERO.HHE. ML:1.9 0.0003325 0.12 AML other m 2020-08-20T06:07:22.20
IV.RM33.EHE. ML:1.7 0.00028900000000000003 1.28 AML other m 2020-08-20T06:07:22.80
IV.GAVE.EHN. ML:2.0 0.0005465 0.3 AML other m 2020-08-20T06:07:22.32
IV.SMA1.EHE. ML:1.6 0.00045599999999999997 0.52 AML other m 2020-08-20T06:07:22.71
IV.FDMO.HHN. ML:1.6 0.000187 0.86 AML other m 2020-08-20T06:07:22.51
IV.MF5.EHE. ML:1.6 0.00017199999999999998 0.3 AML other m 2020-08-20T06:07:23.82
IV.GUMA.HHE. ML:2.6 0.001645 0.32 AML other m 2020-08-20T06:07:24.42
IV.FDMO.HHE. ML:1.6 0.00016499999999999997 0.18 AML other m 2020-08-20T06:07:24.86
IV.GUMA.HHN. ML:2.2 0.000735 0.68 AML other m 2020-08-20T06:07:24.87
IV.ARRO.EHE. ML:1.5 0.0000996 0.74 AML other m 2020-08-20T06:07:26.41
IV.MF5.EHN. ML:1.6 0.0001749 0.42 AML other m 2020-08-20T06:07:27.02
IV.FIAM.HHN. ML:1.3 0.000045950000000000006 0.26 AML other m 2020-08-20T06:07:28.46
IV.OFFI.HHN. ML:1.8 0.0001835 0.36 AML other m 2020-08-20T06:07:28.68
IV.FIAM.HHE. ML:1.5 0.00007635 0.92 AML other m 2020-08-20T06:07:29.00
IV.ARRO.EHN. ML:1.5 0.00010445 0.92 AML other m 2020-08-20T06:07:29.61
IV.MOMA.HHN. ML:1.6 0.00010250000000000001 0.14 AML other m 2020-08-20T06:07:29.87
IV.MOMA.HHE. ML:1.9 0.00020050000000000002 0.16 AML other m 2020-08-20T06:07:30.26
IV.MNTT.EHN. ML:1.9 0.00022700000000000002 0.9 AML other m 2020-08-20T06:07:30.59
IV.MNTT.EHE. ML:1.9 0.0002165 0.24 AML other m 2020-08-20T06:07:30.74
IV.ASSB.HHN. ML:1.5 0.00006425 0.28 AML other m 2020-08-20T06:07:31.47
IV.ASSB.HHE. ML:1.4 0.00005715 0.32 AML other m 2020-08-20T06:07:32.45
IV.OFFI.HHE. ML:1.7 0.00017649999999999998 0.44 AML other m 2020-08-20T06:07:33.46
IV.ATCC.EHN. ML:1.5 0.00005065 1.42 AML other m 2020-08-20T06:07:34.22
IV.ATCC.EHE. ML:1.5 0.000048100000000000004 1.18 AML other m 2020-08-20T06:07:34.35
IV.VCEL.EHN. ML:1.4 0.00005715 1.02 AML other m 2020-08-20T06:07:40.77
IV.VCEL.EHE. ML:1.4 0.0000445 0.62 AML other m 2020-08-20T06:07:43.45
IV.MCIV.CHE. ML:2.0 0.00005795 0.12 AML other m 2020-08-20T06:07:57.35
IV.MCIV.CHN. ML:1.8 0.0000424 0.24 AML other m 2020-08-20T06:07:57.30
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