Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.0 on date 21-08-2020 and time 08:48:45 (Italy) in region 2 km NW Sigillo (PG)

A magnitude ML 1.0 earthquake occured in region: 2 km NW Sigillo (PG), on

  • 21-08-2020 06:48:45 (UTC)
  • 21-08-2020 08:48:45 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.3440, 12.7320 at 12 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

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
Sigillo PG 2 2404 2404
Costacciaro PG 2 1216 3620
Fossato di Vico PG 6 2840 6460
Scheggia e Pascelupo PG 9 1393 7853
Gubbio PG 12 32216 40069
Gualdo Tadino PG 13 15208 55277
Fabriano AN 14 31480 86757
Sassoferrato AN 15 7285 94042
Serra Sant'Abbondio PU 17 1027 95069
Cantiano PU 17 2245 97314
Frontone PU 19 1300 98614
Genga AN 19 1797 100411

Municipalities with at least 50000 inhabitants

An earthquake occurred to
38 Km NE of Perugia (166134 inhabitants)
43 Km N of Foligno (57155 inhabitants)
60 Km SW of Fano (60888 inhabitants)
65 Km S of Pesaro (94582 inhabitants)
70 Km E of Arezzo (99543 inhabitants)
71 Km W of Ancona (100861 inhabitants)
81 Km S of Rimini (147750 inhabitants)
87 Km N of Terni (111501 inhabitants)
97 Km SE of Cesena (96758 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
Reviewed
Rev100 		ML 1.0 2020-08-21
06:48:45		 43.3437 12.7317 13 2020-08-21
06:57:04		 Sala Sismica INGV-Roma 82194781
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-08-21 06:48:45 ± 0.03
Latitude 43.3437 ± 0.0018
Longitude 12.7317 ± 0.0025
Depth (km) 13 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 82194781

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 180
Semi-minor axis of confidence ellipse (meter) 14
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 282
Circular confidence region, given by single value of horizontal uncertainty (meter) 180.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 75
Number of associated phases, regardless of their use for origin computation 32
Number of defining phases 32
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.12
Epicentral distance of station closest to the epicenter (degree) 0.05306
Epicentral distance of station farthest from the epicenter (degree) 0.40200
Number of stations at which the event was observed 18
Number of stations from which data was used for origin computation 18
Magnitude information

ML:1.0

Field Value
Value 1.0
Uncertainty 0.3
Num. used stations 18
Type of magnitude ML
Reference to an origin 82194781
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-08-21 06:57:04
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ASSB.HHZ. 2020-08-21T06:48:57.12 0.3 undecidable manual S 190 33.9438 94 -0.05 71
IV.NARO.HHZ. 2020-08-21T06:48:56.79 0.3 undecidable manual S 338 32.0457 94 0.12 70
IV.ATVO.HHZ. 2020-08-21T06:48:55.25 0.3 undecidable manual S 279 26.5512 96 0.04 72
IV.PIEI.HHZ. 2020-08-21T06:48:55.09 0.3 undecidable manual S 323 26.5512 96 -0.12 71
IV.ATPC.HNZ. 2020-08-21T06:48:55.56 0.3 undecidable manual S 305 26.8509 96 0.27 69
IV.ARVD.HHZ. 2020-08-21T06:48:54.73 0.3 undecidable manual S 45 24.0537 97 0.18 71
IV.FDMO.HHZ. 2020-08-21T06:48:54.16 0.1 undecidable manual P 140 44.622 93 0.22 90
IV.ATCC.EHZ. 2020-08-21T06:48:53.35 0.3 undecidable manual S 203 19.0698 103 0.11 72
IV.SNTG.HHZ. 2020-08-21T06:48:53.32 0.3 undecidable manual S 120 19.5693 102 -0.04 73
IV.MURB.HHZ. 2020-08-21T06:48:53.39 0.3 undecidable manual S 242 18.9699 103 0.18 71
IV.FRON.EHZ. 2020-08-21T06:48:53.15 0.3 undecidable manual S 359 19.3695 102 -0.16 71
IV.MPAG.EHZ. 2020-08-21T06:48:52.07 0.3 undecidable manual P 4 31.746 94 0.1 71
IV.ASSB.HHZ. 2020-08-21T06:48:52.08 0.1 undecidable manual P 190 33.9438 94 -0.22 91
IV.ATPC.HNZ. 2020-08-21T06:48:51.20 0.1 undecidable manual P 305 26.8509 96 -0.02 96
IV.ATFO.HHZ. 2020-08-21T06:48:51.72 0.3 undecidable manual S 281 13.1757 117 -0.03 74
IV.ATVO.HHZ. 2020-08-21T06:48:51.03 0.1 undecidable manual P 279 26.5512 96 -0.14 94
IV.ATPI.EHZ. 2020-08-21T06:48:51.54 0.3 undecidable manual P 294 29.0487 95 -0.02 72
IV.ATLO.HNZ. 2020-08-21T06:48:51.05 0.3 undecidable manual P 263 26.3514 96 -0.09 71
IV.NARO.HHZ. 2020-08-21T06:48:51.90 0.1 undecidable manual P 338 32.0457 94 -0.11 94
IV.SSFR.HHZ. 2020-08-21T06:48:51.29 0.3 undecidable manual S 22 11.0778 125 0.02 74
IV.FOSV.EHZ. 2020-08-21T06:48:50.21 0.3 undecidable manual S 156 5.8941 148 -0.11 75
IV.PIEI.HHZ. 2020-08-21T06:48:50.95 0.1 undecidable manual P 323 26.5512 96 -0.22 93
IV.ATCC.EHZ. 2020-08-21T06:48:50.00 0.1 undecidable manual P 203 19.0698 103 -0.03 98
IV.SNTG.HHZ. 2020-08-21T06:48:50.00 0.1 undecidable manual P 120 19.5693 102 -0.1 96
IV.MURB.HHZ. 2020-08-21T06:48:50.05 0.1 undecidable manual P 242 18.9699 103 0.04 98
IV.ARVD.HHZ. 2020-08-21T06:48:50.93 0.3 undecidable manual P 45 24.0537 97 0.14 71
IV.ATSC.EHZ. 2020-08-21T06:48:50.92 0.3 undecidable manual S 338 9.6792 131 -0.05 75
IV.FRON.EHZ. 2020-08-21T06:48:49.99 0.1 undecidable manual P 359 19.3695 102 -0.08 97
IV.ATFO.HHZ. 2020-08-21T06:48:49.31 0.1 undecidable manual P 281 13.1757 117 0.14 96
IV.SSFR.HHZ. 2020-08-21T06:48:48.95 0.1 undecidable manual P 22 11.0778 125 0.05 98
IV.ATSC.EHZ. 2020-08-21T06:48:48.69 0.1 undecidable manual P 338 9.6792 131 -0.03 100
IV.FOSV.EHZ. 2020-08-21T06:48:48.33 0.1 undecidable manual P 156 5.8941 148 -0.01 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FOSV.EHN. ML:1.0 0.0001275 0.24 AML other m 2020-08-21T06:48:50.39
IV.FOSV.EHE. ML:1.2 0.00018449999999999999 0.08 AML other m 2020-08-21T06:48:50.29
IV.ATFO.HHN. ML:0.7 0.000047799999999999996 0.2 AML other m 2020-08-21T06:48:52.13
IV.ATFO.HHE. ML:0.9 0.00007205 0.72 AML other m 2020-08-21T06:48:52.87
IV.SNTG.HHE. ML:0.7 0.00003535 0.48 AML other m 2020-08-21T06:48:53.64
IV.ATCC.EHN. ML:1.4 0.00020500000000000002 0.1 AML other m 2020-08-21T06:48:53.45
IV.ATCC.EHE. ML:1.4 0.000201 0.26 AML other m 2020-08-21T06:48:53.40
IV.FRON.EHN. ML:1.2 0.0001135 0.28 AML other m 2020-08-21T06:48:53.76
IV.FRON.EHE. ML:0.9 0.00005985 1.28 AML other m 2020-08-21T06:48:54.65
IV.MURB.HHE. ML:1.2 0.0001255 1.78 AML other m 2020-08-21T06:48:54.97
IV.MURB.HHN. ML:1.3 0.000155 0.72 AML other m 2020-08-21T06:48:54.56
IV.SNTG.HHN. ML:1.0 0.0000776 0.16 AML other m 2020-08-21T06:48:54.25
IV.ARVD.HHE. ML:1.3 0.00010765 0.1 AML other m 2020-08-21T06:48:54.86
IV.ARVD.HHN. ML:1.0 0.0000626 1.92 AML other m 2020-08-21T06:48:54.97
IV.ATVO.HHN. ML:0.6 0.00002095 0.54 AML other m 2020-08-21T06:48:55.26
IV.PIEI.HHN. ML:0.9 0.0000413 0.32 AML other m 2020-08-21T06:48:55.30
IV.ATVO.HHE. ML:0.7 0.000026450000000000003 0.32 AML other m 2020-08-21T06:48:55.64
IV.PIEI.HHE. ML:1.0 0.00004935 0.7 AML other m 2020-08-21T06:48:55.53
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