Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.7 on date 21-05-2021 and time 17:26:27 (Italy) in region 4 km W Gubbio (PG)

A magnitude ML 0.7 earthquake occured in region: 4 km W Gubbio (PG), on

  • 21-05-2021 15:26:27 (UTC)
  • 21-05-2021 17:26:27 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.3640, 12.5280 at 7 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
Gubbio PG 4 32216 32216
Pietralunga PG 11 2111 34327
Scheggia e Pascelupo PG 12 1393 35720
Cantiano PU 15 2245 37965
Costacciaro PG 15 1216 39181
Montone PG 16 1680 40861
Umbertide PG 17 16681 57542
Sigillo PG 18 2404 59946

Municipalities with at least 50000 inhabitants

An earthquake occurred to
31 Km NE of Perugia (166134 inhabitants)
48 Km NW of Foligno (57155 inhabitants)
53 Km E of Arezzo (99543 inhabitants)
67 Km SW of Fano (60888 inhabitants)
68 Km SW of Pesaro (94582 inhabitants)
78 Km S of Rimini (147750 inhabitants)
85 Km W of Ancona (100861 inhabitants)
89 Km S of Cesena (96758 inhabitants)
90 Km N of Terni (111501 inhabitants)
97 Km E of Siena (53903 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 0.7 2021-05-21
15:26:27		 43.3642 12.5283 7 2021-12-29
11:12:12		 Bollettino Sismico Italiano INGV 92991181
Reviewed
Rev100 		ML 1.2 2021-05-21
15:26:27		 43.3652 12.5163 8 2021-05-21
15:30:38		 Sala Sismica INGV-Roma 90339621
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-05-21 15:26:27 ± 0.11
Latitude 43.3642 ± 0.0027
Longitude 12.5283 ± 0.0025
Depth (km) 7 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 92991181

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 288
Semi-minor axis of confidence ellipse (meter) 85
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 349
Circular confidence region, given by single value of horizontal uncertainty (meter) 290.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 97
Number of associated phases, regardless of their use for origin computation 29
Number of defining phases 24
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.17
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.25271
Number of stations at which the event was observed 17
Number of stations from which data was used for origin computation 12
Magnitudes information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.8
Num. used stations 8
Type of magnitude ML
Reference to an origin 90339621
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-05-21 15:30:38

ML:0.7

Field Value
Value 0.7
Uncertainty 0.3
Num. used stations 8
Type of magnitude ML
Reference to an origin 92991181
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-07-20 15:06:28
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CERT.HHZ. 2021-05-21T15:27:07.88 3.0 undecidable manual S 0 0
IV.ARRO.EHZ. 2021-05-21T15:26:53.98 3.0 undecidable manual S 0 0
IV.BADI.EHZ. 2021-05-21T15:26:37.28 0.3 undecidable manual S 305 28.0497 104 -0.06 72
IV.SSFR.HHZ. 2021-05-21T15:26:35.25 0.3 undecidable manual S 69 21.9669 108 -0.08 72
IV.PIEI.HHZ. 2021-05-21T15:26:34.40 0.3 undecidable manual S 2 19.0698 110 0.03 73
IV.ATLO.HNZ. 2021-05-21T15:26:32.02 0.3 undecidable manual S 241 11.1777 122 0.11 73
IV.MURB.HHZ. 2021-05-21T15:26:32.04 0.3 undecidable manual S 182 11.1777 122 0.12 73
IV.ATPI.EHZ. 2021-05-21T15:26:32.83 0.3 undecidable manual S 313 13.9749 117 0.07 73
IV.ATBU.EHZ. 2021-05-21T15:26:32.70 0.3 undecidable manual S 7 12.4764 120 0.4 69
IV.ATSC.EHZ. 2021-05-21T15:26:32.99 0.3 undecidable manual S 62 14.3745 116 0.11 73
IV.BADI.EHZ. 2021-05-21T15:26:32.49 0.3 undecidable manual P 305 28.0497 104 -0.61 62
IV.PIEI.HHZ. 2021-05-21T15:26:31.34 0.3 undecidable manual P 2 19.0698 110 -0.05 73
IV.SSFR.HHZ. 2021-05-21T15:26:31.76 0.6 undecidable manual P 69 21.9669 108 -0.18 47
IV.CPGN.EHZ. 2021-05-21T15:26:31.90 3.0 undecidable manual P 0
IV.TB03.DHZ.01 2021-05-21T15:26:31.64 0.3 undecidable manual S 294 10.3785 124 -0.04 74
IV.ATVO.HHZ. 2021-05-21T15:26:31.53 0.3 undecidable manual S 282 9.9789 125 -0.04 74
IV.TB01.DHZ.01 2021-05-21T15:26:30.93 0.3 undecidable manual S 285 7.6812 133 -0.02 75
IV.ATLO.HNZ. 2021-05-21T15:26:30.04 0.1 undecidable manual P 241 11.1777 122 0.07 98
IV.MURB.HHZ. 2021-05-21T15:26:30.15 0.3 undecidable manual P 182 11.1777 122 0.18 72
IV.ATPI.EHZ. 2021-05-21T15:26:30.50 0.3 undecidable manual P 313 13.9749 117 0.04 74
IV.ATBU.EHZ. 2021-05-21T15:26:30.36 0.1 undecidable manual P 7 12.4764 120 0.17 96
IV.ATSC.EHZ. 2021-05-21T15:26:30.50 0.1 undecidable manual P 62 14.3745 116 -0.02 99
IV.ATVO.HHZ. 2021-05-21T15:26:29.76 0.1 undecidable manual P 282 9.9789 125 -0.01 100
IV.TB01.DHZ.01 2021-05-21T15:26:29.42 0.1 undecidable manual P 285 7.6812 133 0.01 100
IV.TB03.DHZ.01 2021-05-21T15:26:29.83 0.1 undecidable manual P 294 10.3785 124 0 100
IV.ATFO.HHZ. 2021-05-21T15:26:29.68 0.3 undecidable manual S 85 3.4965 154 -0.38 70
IV.ATFO.HHZ. 2021-05-21T15:26:28.85 0.1 undecidable manual P 85 3.4965 154 -0.05 100
IV.MML1.EHZ. 2021-05-21T15:26:27.90 3.0 undecidable manual P 0
IV.MNTP.HNZ. 2021-05-21T15:26:26.28 3.0 undecidable manual P 0 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ATVO.HHN. ML:0.9 0.00010805000000000001 0.2 AML other m 2021-05-21T15:26:31.63
IV.ATVO.HHE. ML:0.7 0.0000709 0.12 AML other m 2021-05-21T15:26:31.70
IV.MURB.HHE. ML:0.8 0.00009725 0.52 AML other m 2021-05-21T15:26:32.39
IV.MURB.HHN. ML:0.7 0.00007525 0.2 AML other m 2021-05-21T15:26:32.84
IV.MURB.HNN. ML:0.7 0.00007676865849999999 0.1792 AML other m 2021-05-21T15:26:32.84
IV.MURB.HNE. ML:0.9 0.00010452141499999999 0.1536 AML other m 2021-05-21T15:26:33.57
IV.ATPI.EHN. ML:0.1 0.000013308450999999999 0.1664 AML other m 2021-05-21T15:26:33.05
IV.ATPI.EHE. ML:0.0 0.0000114502005 0.1024 AML other m 2021-05-21T15:26:34.28
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