Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.4 on date 20-05-2020 and time 13:27:18 (Italy) in region 9 km NW Arquata del Tronto (AP)

A magnitude ML 1.4 earthquake occured in region: 9 km NW Arquata del Tronto (AP), on

  • 20-05-2020 11:27:18 (UTC)
  • 20-05-2020 13:27:18 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.8260, 13.2140 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
Arquata del Tronto AP 9 1178 1178
Castelsantangelo sul Nera MC 9 281 1459
Montegallo AP 10 523 1982
Norcia PG 10 4957 6939
Montemonaco AP 13 604 7543
Ussita MC 15 444 7987
Accumoli RI 15 667 8654
Preci PG 15 724 9378
Visso MC 16 1107 10485
Montefortino FM 17 1178 11663
Acquasanta Terme AP 17 2916 14579
Bolognola MC 19 142 14721

Municipalities with at least 50000 inhabitants

An earthquake occurred to
44 Km E of Foligno (57155 inhabitants)
44 Km W of Teramo (54892 inhabitants)
55 Km N of L'Aquila (69753 inhabitants)
55 Km NE of Terni (111501 inhabitants)
74 Km E of Perugia (166134 inhabitants)
84 Km W of Montesilvano (53738 inhabitants)
91 Km W of Pescara (121014 inhabitants)
92 Km S of Ancona (100861 inhabitants)
94 Km NW of Chieti (51815 inhabitants)
100 Km NE of Guidonia Montecelio (88673 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 1.4 2020-05-20
11:27:18		 42.8258 13.2137 9 2020-11-19
12:36:56		 Bollettino Sismico Italiano INGV 81673091
Reviewed
Rev100 		ML 1.5 2020-05-20
11:27:18		 42.8258 13.2132 9 2020-05-20
11:31:12		 Sala Sismica INGV-Roma 79362271
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-05-20 11:27:18 ± 0.06
Latitude 42.8258 ± 0.0036
Longitude 13.2137 ± 0.0049
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 81673091

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 390
Semi-minor axis of confidence ellipse (meter) 251
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 52
Circular confidence region, given by single value of horizontal uncertainty (meter) 390.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 69
Number of associated phases, regardless of their use for origin computation 30
Number of defining phases 30
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) 0.07285
Epicentral distance of station farthest from the epicenter (degree) 0.46045
Number of stations at which the event was observed 19
Number of stations from which data was used for origin computation 19
Magnitudes information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.3
Num. used stations 34
Type of magnitude ML
Reference to an origin 81673091
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-08-05 12:08:40

ML:1.5

Field Value
Value 1.5
Uncertainty 0.3
Num. used stations 20
Type of magnitude ML
Reference to an origin 79362271
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-05-20 11:31:12
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ASSB.HHZ. 2020-05-20T11:27:35.69 0.3 undecidable manual S 298 51.1155 50 0.3 66
IV.TERO.HHZ. 2020-05-20T11:27:32.12 0.3 undecidable manual S 125 38.9277 50 -0.04 71
IV.CESI.HHZ. 2020-05-20T11:27:30.31 0.3 undecidable manual S 308 32.0457 50 0 72
IV.CSP1.EHZ. 2020-05-20T11:27:29.30 0.3 undecidable manual S 359 29.5482 107 -0.18 70
IV.GUMA.HHZ. 2020-05-20T11:27:29.51 0.3 undecidable manual S 21 28.0497 107 0.51 65
IV.LNSS.HHZ. 2020-05-20T11:27:29.76 0.6 undecidable manual S 210 28.4493 107 0.63 41
IV.ASSB.HHZ. 2020-05-20T11:27:28.54 0.3 positive manual P 298 51.1155 50 0.16 67
IV.FDMO.HHZ. 2020-05-20T11:27:28.43 0.3 undecidable manual S 336 25.5522 109 0.27 69
IV.SAP2.EHE. 2020-05-20T11:27:26.59 0.6 undecidable manual P 27 33.6441 50 0.9 37
IV.TERO.HHZ. 2020-05-20T11:27:26.23 0.3 positive manual P 125 38.9277 50 -0.28 67
IV.MML1.HNE. 2020-05-20T11:27:26.09 0.3 undecidable manual P 328 37.4292 50 -0.19 69
IV.RM33.EHZ. 2020-05-20T11:27:25.87 0.3 undecidable manual P 180 35.1426 50 -0.05 71
IV.MTRA.EHZ. 2020-05-20T11:27:25.60 0.3 undecidable manual S 117 16.7721 118 0.25 70
IV.CAMP.HHE. 2020-05-20T11:27:25.59 0.3 undecidable manual P 154 35.9418 50 -0.45 65
IV.CESI.HHZ. 2020-05-20T11:27:25.23 0.3 undecidable manual P 308 32.0457 50 -0.21 69
IV.PF6.EHN. 2020-05-20T11:27:25.55 0.6 undecidable manual P 357 34.6431 50 -0.29 45
IT.MTCL.HGZ. 2020-05-20T11:27:24.08 0.3 undecidable manual P 317 25.5522 109 -0.12 71
IV.LNSS.HHZ. 2020-05-20T11:27:24.59 0.1 undecidable manual P 210 28.4493 107 -0.17 93
IV.CSP1.EHZ. 2020-05-20T11:27:24.87 0.3 undecidable manual P 359 29.5482 107 -0.09 71
IV.GUMA.HHZ. 2020-05-20T11:27:24.88 0.3 undecidable manual P 21 28.0497 107 0.19 70
IV.MMO1.EHZ. 2020-05-20T11:27:23.69 0.3 undecidable manual S 48 12.2766 126 -0.35 69
IV.FEMA.HNE. 2020-05-20T11:27:23.87 0.6 undecidable manual P 319 20.1687 114 0.67 41
IV.T1299.HNN. 2020-05-20T11:27:23.89 0.6 undecidable manual P 165 21.9669 112 0.36 45
IV.MC2.EHZ. 2020-05-20T11:27:23.13 0.3 undecidable manual S 348 9.6792 132 -0.21 72
IV.FDMO.HHZ. 2020-05-20T11:27:23.89 0.3 undecidable manual P 336 25.5522 109 -0.31 68
IV.NRCA.HHZ. 2020-05-20T11:27:22.74 0.1 undecidable manual S 276 8.0808 137 -0.21 96
IV.MTRA.EHZ. 2020-05-20T11:27:22.73 0.1 undecidable manual P 117 16.7721 118 0.15 96
IV.MC2.EHZ. 2020-05-20T11:27:21.43 0.3 negative manual P 348 9.6792 132 0.01 75
IV.MMO1.EHZ. 2020-05-20T11:27:21.69 0.3 positive manual P 48 12.2766 126 -0.13 73
IV.NRCA.HHZ. 2020-05-20T11:27:21.20 0.1 positive manual P 276 8.0808 137 0.01 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HNE. ML:1.9 0.0012307295 0.1088 AML other m 2020-05-20T11:27:23.10
IV.NRCA.HNN. ML:2.0 0.0014437014999999999 0.0896 AML other m 2020-05-20T11:27:23.16
IV.NRCA.HHN. ML:2.0 0.0015235325 0.0832 AML other m 2020-05-20T11:27:23.16
IV.NRCA.HHE. ML:1.9 0.0013470084999999998 0.1216 AML other m 2020-05-20T11:27:23.10
IV.MTRA.EHE. ML:1.4 0.00022653955000000002 0.2752 AML other m 2020-05-20T11:27:27.46
IV.MTRA.EHN. ML:1.5 0.00025939524999999997 0.256 AML other m 2020-05-20T11:27:27.70
IV.MTRA.HNE. ML:1.3 0.00018385025 0.2624 AML other m 2020-05-20T11:27:28.47
IV.MTRA.HNN. ML:1.5 0.00030683035 0.256 AML other m 2020-05-20T11:27:27.83
IV.FDMO.HHE. ML:1.1 0.00007570378999999999 0.16 AML other m 2020-05-20T11:27:30.00
IV.FDMO.HHN. ML:1.2 0.00008254359 0.2432 AML other m 2020-05-20T11:27:29.58
IV.LNSS.HNE. ML:1.4 0.00012910685 0.128 AML other m 2020-05-20T11:27:30.57
IV.LNSS.HHE. ML:1.4 0.00012623395500000002 0.1216 AML other m 2020-05-20T11:27:30.32
IV.LNSS.HNN. ML:1.4 0.000140376915 0.7872 AML other m 2020-05-20T11:27:37.20
IV.LNSS.HHN. ML:1.3 0.00011089749499999998 0.1408 AML other m 2020-05-20T11:27:30.63
IV.CSP1.EHE. ML:1.2 0.00007972564999999999 0.2368 AML other m 2020-05-20T11:27:32.98
IV.CSP1.EHN. ML:1.2 0.00008744961 0.2176 AML other m 2020-05-20T11:27:31.45
IV.GUMA.HHE. ML:2.0 0.00046954859999999996 0.2816 AML other m 2020-05-20T11:27:29.77
IV.GUMA.HNN. ML:1.8 0.0003405273 0.3072 AML other m 2020-05-20T11:27:29.79
IV.GUMA.HHN. ML:1.6 0.00022419149999999998 0.256 AML other m 2020-05-20T11:27:30.18
IV.GUMA.HNE. ML:1.8 0.00030080385 0.288 AML other m 2020-05-20T11:27:29.76
IV.CESI.HNE. ML:1.3 0.00008816297 0.6848 AML other m 2020-05-20T11:27:34.11
IV.CESI.HNN. ML:1.6 0.00019981525 0.3776 AML other m 2020-05-20T11:27:30.80
IV.CESI.HHN. ML:1.5 0.00014678625000000002 0.16 AML other m 2020-05-20T11:27:31.90
IV.CESI.HHE. ML:1.2 0.00007552688 0.1984 AML other m 2020-05-20T11:27:32.29
IV.RM33.EHE. ML:1.1 0.000048727469999999995 0.1792 AML other m 2020-05-20T11:27:34.29
IV.RM33.HNN. ML:1.6 0.0001559591 0.704 AML other m 2020-05-20T11:27:40.29
IV.RM33.EHN. ML:1.1 0.000048811049999999994 0.1792 AML other m 2020-05-20T11:27:32.55
IV.RM33.HNE. ML:1.5 0.00012994905000000002 0.7616 AML other m 2020-05-20T11:27:40.99
IV.TERO.HNE. ML:1.4 0.00009910691499999999 0.7616 AML other m 2020-05-20T11:27:31.45
IV.TERO.HNN. ML:1.7 0.00018305215 0.7872 AML other m 2020-05-20T11:27:38.08
IV.TERO.HHE. ML:1.1 0.00004329929000000001 0.16 AML other m 2020-05-20T11:27:33.23
IV.TERO.HHN. ML:1.2 0.000055129685 0.1024 AML other m 2020-05-20T11:27:32.22
IV.ASSB.HHN. ML:1.1 0.000029973504999999997 0.2048 AML other m 2020-05-20T11:27:38.22
IV.ASSB.HHE. ML:1.2 0.000037556435 0.16 AML other m 2020-05-20T11:27:36.71
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