Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.5 on date 31-03-2021 and time 22:38:38 (Italy) in region 7 km N Gubbio (PG)

A magnitude ML 0.5 earthquake occured in region: 7 km N Gubbio (PG), on

  • 31-03-2021 20:38:38 (UTC)
  • 31-03-2021 22:38:38 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.4190, 12.5680 at 11 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
Gubbio PG 7 32216 32216
Cantiano PU 8 2245 34461
Scheggia e Pascelupo PG 8 1393 35854
Pietralunga PG 11 2111 37965
Costacciaro PG 13 1216 39181
Cagli PU 16 8731 47912
Sigillo PG 17 2404 50316
Frontone PU 18 1300 51616
Serra Sant'Abbondio PU 18 1027 52643
Piobbico PU 20 2029 54672
Apecchio PU 20 1882 56554

Municipalities with at least 50000 inhabitants

An earthquake occurred to
38 Km NE of Perugia (166134 inhabitants)
53 Km N of Foligno (57155 inhabitants)
56 Km E of Arezzo (99543 inhabitants)
60 Km SW of Fano (60888 inhabitants)
61 Km SW of Pesaro (94582 inhabitants)
72 Km S of Rimini (147750 inhabitants)
80 Km W of Ancona (100861 inhabitants)
84 Km SE of Cesena (96758 inhabitants)
96 Km N of Terni (111501 inhabitants)
99 Km SE of Forlì (117913 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 0.5 2021-03-31
20:38:38		 43.4188 12.5685 11 2021-03-31
21:03:56		 Sala Sismica INGV-Roma 88653421
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-03-31 20:38:38 ± 0.04
Latitude 43.4188 ± 0.0027
Longitude 12.5685 ± 0.0037
Depth (km) 11 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 88653421

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 285
Semi-minor axis of confidence ellipse (meter) 205
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 312
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) 80
Number of associated phases, regardless of their use for origin computation 33
Number of defining phases 33
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.16
Epicentral distance of station closest to the epicenter (degree) 0.05216
Epicentral distance of station farthest from the epicenter (degree) 0.28149
Number of stations at which the event was observed 17
Number of stations from which data was used for origin computation 17
Magnitude information

ML:0.5

Field Value
Value 0.5
Uncertainty 0.3
Num. used stations 8
Type of magnitude ML
Reference to an origin 88653421
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-03-31 21:03:56
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MPAG.EHZ. 2021-03-31T20:38:48.44 0.6 undecidable manual S 33 27.9498 50 -0.11 48
IV.ATCC.EHZ. 2021-03-31T20:38:48.48 0.6 undecidable manual S 167 26.5512 50 0.29 46
IV.MURB.HHZ. 2021-03-31T20:38:46.11 0.6 undecidable manual S 192 17.6712 121 0.37 46
IV.NARO.HHZ. 2021-03-31T20:38:46.68 0.6 undecidable manual S 3 21.2676 50 -0.1 49
IV.SSFR.HHZ. 2021-03-31T20:38:45.51 0.6 undecidable manual S 84 17.3715 122 -0.13 48
IV.FRON.EHZ. 2021-03-31T20:38:45.39 0.6 undecidable manual S 49 16.7721 123 -0.08 49
IV.PE3.EHZ. 2021-03-31T20:38:45.30 1.0 positive manual P 349 31.2465 50 0.45 22
IV.ATLO.EHZ. 2021-03-31T20:38:45.34 0.6 undecidable manual S 229 17.3715 122 -0.31 47
IV.TB01.DHZ. 2021-03-31T20:38:44.00 0.6 undecidable manual S 249 11.4774 133 -0.02 50
IV.ATPI.EHZ. 2021-03-31T20:38:44.59 0.6 undecidable manual S 285 13.875 128 -0.05 49
IV.TB03.DHZ. 2021-03-31T20:38:44.39 0.6 undecidable manual S 261 12.876 130 0 50
IV.TB02.DHZ. 2021-03-31T20:38:44.57 0.6 undecidable manual S 247 13.875 128 -0.09 49
IV.MPAG.EHZ. 2021-03-31T20:38:44.29 0.6 positive manual P 33 27.9498 50 -0.04 49
IV.ATPC.HNZ. 2021-03-31T20:38:44.18 0.6 undecidable manual S 307 11.2776 134 0.2 49
IV.PIEI.HHZ. 2021-03-31T20:38:44.30 0.6 undecidable manual S 348 13.2756 129 -0.18 48
IV.ATCC.EHZ. 2021-03-31T20:38:44.14 0.1 undecidable manual P 167 26.5512 50 0.02 97
IV.ATSC.EHZ. 2021-03-31T20:38:43.53 0.6 undecidable manual S 87 9.4794 138 -0.01 50
IV.NARO.HHZ. 2021-03-31T20:38:43.09 0.1 undecidable manual P 3 21.2676 50 -0.21 96
IV.ATBU.HNZ. 2021-03-31T20:38:43.31 0.3 undecidable manual S 346 6.4935 149 0.39 71
IV.MURB.HHZ. 2021-03-31T20:38:42.82 0.3 negative manual P 192 17.6712 121 0.12 73
IV.ATLO.EHZ. 2021-03-31T20:38:42.45 0.1 undecidable manual P 229 17.3715 122 -0.2 96
IV.SSFR.HHZ. 2021-03-31T20:38:42.48 0.1 undecidable manual P 84 17.3715 122 -0.17 96
IV.ATPI.EHZ. 2021-03-31T20:38:42.19 0.6 negative manual P 285 13.875 128 0.11 49
IV.ATFO.HHZ. 2021-03-31T20:38:42.66 0.6 undecidable manual S 178 5.7942 152 -0.15 49
IV.TB02.DHZ. 2021-03-31T20:38:42.11 0.1 undecidable manual P 247 13.875 128 0.02 100
IV.FRON.EHZ. 2021-03-31T20:38:42.46 0.6 positive manual P 49 16.7721 123 -0.09 49
IV.ATFO.HHZ. 2021-03-31T20:38:41.13 0.1 negative manual P 178 5.7942 152 0.12 100
IV.ATPC.HNZ. 2021-03-31T20:38:41.77 0.1 undecidable manual P 307 11.2776 134 0.09 99
IV.PIEI.HHZ. 2021-03-31T20:38:41.95 0.3 positive manual P 348 13.2756 129 -0.03 75
IV.TB01.DHZ. 2021-03-31T20:38:41.57 0.1 undecidable manual P 249 11.4774 133 -0.14 98
IV.ATSC.EHZ. 2021-03-31T20:38:41.55 0.1 undecidable manual P 87 9.4794 138 0.11 99
IV.TB03.DHZ. 2021-03-31T20:38:41.77 0.1 undecidable manual P 261 12.876 130 -0.15 97
IV.ATBU.HNZ. 2021-03-31T20:38:41.47 0.1 undecidable manual P 346 6.4935 149 0.39 94
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ATFO.HHN. ML:0.5 0.00004645 0.16 AML other m 2021-03-31T20:38:42.83
IV.PIEI.HHE. ML:0.7 0.0000533 1.02 AML other m 2021-03-31T20:38:44.56
IV.PIEI.HHN. ML:0.3 0.0000193 0.68 AML other m 2021-03-31T20:38:45.42
IV.MURB.HHE. ML:1.0 0.0000917 0.22 AML other m 2021-03-31T20:38:46.50
IV.MURB.HHN. ML:1.0 0.00008499999999999999 0.2 AML other m 2021-03-31T20:38:46.64
IV.NARO.HHE. ML:0.3 0.00001295 0.38 AML other m 2021-03-31T20:38:46.68
IV.NARO.HHN. ML:0.2 0.0000115 1.18 AML other m 2021-03-31T20:38:47.25
IV.ATFO.HHE. ML:0.5 0.000047149999999999994 0.3 AML other m 2021-03-31T20:38:47.66
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