Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.8 on date 31-05-2021 and time 10:05:13 (Italy) in region 3 km SW Genga (AN)

A magnitude ML 0.8 earthquake occured in region: 3 km SW Genga (AN), on

  • 31-05-2021 08:05:13 (UTC)
  • 31-05-2021 10:05:13 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.4070, 12.9120 at 21 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
Genga AN 3 1797 1797
Sassoferrato AN 5 7285 9082
Fabriano AN 8 31480 40562
Serra San Quirico AN 10 2850 43412
Arcevia AN 11 4612 48024
Cerreto d'Esi AN 11 3817 51841
Mergo AN 13 1037 52878
Poggio San Vicino MC 14 246 53124
Serra Sant'Abbondio PU 15 1027 54151
Rosora AN 15 1985 56136
Sigillo PG 16 2404 58540
Castelplanio AN 17 3540 62080
Costacciaro PG 17 1216 63296
Cupramontana AN 17 4756 68052
Fossato di Vico PG 17 2840 70892
Esanatoglia MC 18 2034 72926
Poggio San Marcello AN 18 693 73619
Apiro MC 18 2280 75899
Montecarotto AN 18 1987 77886
Serra de' Conti AN 18 3746 81632
Pergola PU 18 6333 87965
Frontone PU 18 1300 89265
Matelica MC 19 9981 99246
Maiolati Spontini AN 19 6248 105494
Scheggia e Pascelupo PG 20 1393 106887

Municipalities with at least 50000 inhabitants

An earthquake occurred to
49 Km S of Fano (60888 inhabitants)
53 Km NE of Foligno (57155 inhabitants)
54 Km NE of Perugia (166134 inhabitants)
54 Km W of Ancona (100861 inhabitants)
56 Km S of Pesaro (94582 inhabitants)
78 Km SE of Rimini (147750 inhabitants)
83 Km E of Arezzo (99543 inhabitants)
97 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
Bulletin
Rev1000 		ML 0.8 2021-05-31
08:05:13		 43.4073 12.9117 21 2021-12-29
11:12:05		 Bollettino Sismico Italiano INGV 91435541
Reviewed
Rev100 		ML 0.8 2021-05-31
08:05:13		 43.4023 12.9112 20 2021-05-31
08:12:16		 Sala Sismica INGV-Roma 90656721
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-05-31 08:05:13 ± 0.08
Latitude 43.4073 ± 0.0027
Longitude 12.9117 ± 0.0037
Depth (km) 21 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 91435541

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 344
Semi-minor axis of confidence ellipse (meter) 164
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 217
Circular confidence region, given by single value of horizontal uncertainty (meter) 340.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 62
Number of associated phases, regardless of their use for origin computation 28
Number of defining phases 28
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.14
Epicentral distance of station closest to the epicenter (degree) 0.07105
Epicentral distance of station farthest from the epicenter (degree) 0.40200
Number of stations at which the event was observed 14
Number of stations from which data was used for origin computation 14
Magnitudes information

ML:0.8

Field Value
Value 0.8
Uncertainty 0.1
Num. used stations 10
Type of magnitude ML
Reference to an origin 91435541
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-06-17 07:52:31

ML:0.8

Field Value
Value 0.8
Uncertainty 0.1
Num. used stations 10
Type of magnitude ML
Reference to an origin 90656721
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-05-31 08:12:16
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.FDMO.HHZ. 2021-05-31T08:05:27.77 0.3 undecidable manual S 161 43.5231 108 0.18 69
IV.CESI.HHE. 2021-05-31T08:05:27.87 0.6 undecidable manual S 181 44.622 107 -0.01 47
IV.PIEI.HHZ. 2021-05-31T08:05:25.22 0.3 undecidable manual S 295 33.5442 114 0.13 71
IV.MML1.HNE. 2021-05-31T08:05:25.02 0.3 undecidable manual S 172 32.9448 115 0.06 72
IV.MURB.HHE. 2021-05-31T08:05:25.78 0.6 undecidable manual S 243 35.1426 113 0.3 45
IV.ATFO.HHZ. 2021-05-31T08:05:23.70 0.6 undecidable manual S 261 27.75 120 -0.03 48
IV.MPAG.EHZ. 2021-05-31T08:05:23.71 0.6 undecidable manual S 334 27.4503 120 0.05 48
IV.CING.HNZ. 2021-05-31T08:05:22.88 0.6 undecidable manual S 99 23.1546 125 0.2 47
IV.ATSC.EHZ. 2021-05-31T08:05:21.42 0.3 undecidable manual S 276 18.2706 133 -0.25 70
IV.CESI.HHE. 2021-05-31T08:05:21.44 0.1 undecidable manual P 181 44.622 107 -0.19 91
IV.FRON.EHZ. 2021-05-31T08:05:21.97 0.3 undecidable manual S 309 19.3695 131 0.09 73
IV.EL6.EHZ. 2021-05-31T08:05:21.48 0.3 undecidable manual S 119 17.5713 134 -0.06 74
IV.FDMO.HHZ. 2021-05-31T08:05:21.18 0.6 undecidable manual P 161 43.5231 108 -0.28 45
IV.MURB.HHE. 2021-05-31T08:05:20.65 0.3 undecidable manual P 243 35.1426 113 0.41 66
IV.SSFR.HHE. 2021-05-31T08:05:20.26 0.3 undecidable manual S 287 10.878 149 -0.17 73
IV.MMUR.HNZ. 2021-05-31T08:05:20.21 0.3 undecidable manual S 61 7.881 157 0.15 73
IV.ARVD.HHZ. 2021-05-31T08:05:20.08 0.6 undecidable manual S 13 10.3785 150 -0.27 48
IV.ATFO.HHZ. 2021-05-31T08:05:19.30 0.6 undecidable manual P 261 27.75 120 0.07 48
IV.MPAG.EHZ. 2021-05-31T08:05:19.20 0.1 undecidable manual P 334 27.4503 120 0.01 97
IV.PIEI.HHZ. 2021-05-31T08:05:19.93 0.1 undecidable manual P 295 33.5442 114 -0.09 94
IV.MML1.HNE. 2021-05-31T08:05:19.82 0.1 undecidable manual P 172 32.9448 115 -0.12 94
IV.CING.HNZ. 2021-05-31T08:05:18.57 0.6 undecidable manual P 99 23.1546 125 -0.05 49
IV.ATSC.EHZ. 2021-05-31T08:05:18.06 0.1 undecidable manual P 276 18.2706 133 0.02 99
IV.FRON.EHZ. 2021-05-31T08:05:18.09 0.1 undecidable manual P 309 19.3695 131 -0.08 97
IV.EL6.EHZ. 2021-05-31T08:05:17.93 0.6 undecidable manual P 119 17.5713 134 -0.04 49
IV.ARVD.HHZ. 2021-05-31T08:05:17.16 0.1 undecidable manual P 13 10.3785 150 -0.12 98
IV.SSFR.HHE. 2021-05-31T08:05:17.32 0.1 undecidable manual P 287 10.878 149 -0.01 100
IV.MMUR.HNZ. 2021-05-31T08:05:17.31 0.1 undecidable manual P 61 7.881 157 0.2 96
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ARVD.HHN. ML:0.9 0.000048 0.6 AML other m 2021-05-31T08:05:20.17
IV.ARVD.HHE. ML:0.9 0.00006214999999999999 1.1 AML other m 2021-05-31T08:05:20.43
IV.EL6.EHE. ML:0.9 0.00005196391 0.1408 AML other m 2021-05-31T08:05:22.34
IV.FRON.EHN. ML:0.7 0.000030801685 0.1408 AML other m 2021-05-31T08:05:22.46
IV.FRON.EHE. ML:0.7 0.000024608400000000003 0.1408 AML other m 2021-05-31T08:05:22.59
IV.EL6.EHN. ML:0.9 0.000043605115 0.2432 AML other m 2021-05-31T08:05:22.97
IV.PIEI.HHN. ML:0.7 0.000021871271499999997 0.1024 AML other m 2021-05-31T08:05:25.63
IV.PIEI.HHE. ML:1.0 0.0000351 0.8 AML other m 2021-05-31T08:05:25.88
IV.FDMO.HHE. ML:0.6 0.000011910891 0.16 AML other m 2021-05-31T08:05:29.49
IV.FDMO.HHN. ML:0.8 0.000020038839999999998 0.1568 AML other m 2021-05-31T08:05:31.73
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