Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.4 on date 25-11-2020 and time 22:25:31 (Italy) in region 6 km W Gubbio (PG)

A magnitude ML 0.4 earthquake occured in region: 6 km W Gubbio (PG), on

  • 25-11-2020 21:25:31 (UTC)
  • 25-11-2020 22:25:31 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.37, 12.51 at 10 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 6 32216 32216
Pietralunga PG 10 2111 34327
Scheggia e Pascelupo PG 13 1393 35720
Montone PG 15 1680 37400
Cantiano PU 15 2245 39645
Costacciaro PG 16 1216 40861
Umbertide PG 16 16681 57542
Sigillo PG 19 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)
52 Km E of Arezzo (99543 inhabitants)
67 Km SW of Fano (60888 inhabitants)
69 Km SW of Pesaro (94582 inhabitants)
77 Km S of Rimini (147750 inhabitants)
86 Km W of Ancona (100861 inhabitants)
88 Km S of Cesena (96758 inhabitants)
90 Km N of Terni (111501 inhabitants)
96 Km E of Siena (53903 inhabitants)
Recent and historical Seismicity
Seismic hazard
Shakemap
Felt maps
The earthquake effects in MCS scale as obtained from the compiled questionnaire

The earthquake effects in MCS scale as obtained from the compiled questionnaire

This map shows the distribution of the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire (http://www.haisentitoilterremoto.it/) that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100 		ML 0.4 2020-11-25
21:25:31		 43.37 12.51 10 2020-11-25
21:38:50		 Sala Sismica INGV-Roma 85017901
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-11-25 21:25:31 ± 0.06
Latitude 43.37 ± 0.00
Longitude 12.51 ± 0.00
Depth (km) 10 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 85017901

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 251
Semi-minor axis of confidence ellipse (meter) 99
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 342
Circular confidence region, given by single value of horizontal uncertainty (meter) 250
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 60
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) 0.2
Epicentral distance of station closest to the epicenter (degree) 0.07734
Epicentral distance of station farthest from the epicenter (degree) 0.24731
Number of stations at which the event was observed 16
Number of stations from which data was used for origin computation 16
Magnitude information

ML:0.4

Field Value
Value 0.4
Uncertainty 0.3
Num. used stations 8
Type of magnitude ML
Reference to an origin 85017901
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-11-25 21:38:50
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.ATCC.HNZ. 2020-11-25T21:25:40.14 0.3 undecidable manual S 153 0.2059 113 0.46 67
IV.NARO.HHZ. 2020-11-25T21:25:40.80 0.3 undecidable manual S 12 0.2473 50 -0.32 69
IV.ATMC.EHZ. 2020-11-25T21:25:40.99 0.3 undecidable manual S 289 0.2446 50 -0.05 73
IV.APEC.HHZ. 2020-11-25T21:25:39.78 0.3 undecidable manual S 341 0.2005 114 0.28 70
IV.SSFR.HNZ. 2020-11-25T21:25:39.59 0.3 undecidable manual S 71 0.2077 113 -0.15 72
IV.ATVA.EHZ. 2020-11-25T21:25:39.24 0.3 undecidable manual S 241 0.188 115 0.2 71
IV.FRON.EHZ. 2020-11-25T21:25:39.92 0.3 undecidable manual S 46 0.2149 112 -0.08 73
IV.FOSV.EHZ. 2020-11-25T21:25:39.17 0.6 undecidable manual S 112 0.1961 114 -0.15 48
IV.ATSC.EHZ. 2020-11-25T21:25:37.56 0.3 undecidable manual S 66 0.1385 122 0.2 72
IV.ATPC.HNZ. 2020-11-25T21:25:37.17 0.3 undecidable manual S 340 0.1187 127 0.43 69
IV.ATMC.EHZ. 2020-11-25T21:25:37.11 0.3 undecidable manual P 289 0.2446 50 0.29 69
IV.APEC.HHZ. 2020-11-25T21:25:36.09 0.3 undecidable manual P 341 0.2005 114 0.16 72
IV.ATCC.HNZ. 2020-11-25T21:25:36.11 0.3 undecidable manual P 153 0.2059 113 0.08 73
IV.MURB.HHZ. 2020-11-25T21:25:36.35 0.3 undecidable manual S 175 0.1061 130 -0.01 75
IV.NARO.HHZ. 2020-11-25T21:25:36.85 0.3 undecidable manual P 12 0.2473 50 -0.01 73
IV.ATPI.EHZ. 2020-11-25T21:25:36.52 0.3 undecidable manual S 316 0.1142 128 -0.08 74
IV.ATBU.EHZ. 2020-11-25T21:25:36.77 0.3 undecidable manual S 14 0.1097 129 0.29 71
IV.FRON.EHZ. 2020-11-25T21:25:36.00 0.3 undecidable manual P 46 0.2149 112 -0.22 70
IV.FOSV.EHZ. 2020-11-25T21:25:35.78 0.3 undecidable manual P 112 0.1961 114 -0.05 73
IV.ATVO.HHZ. 2020-11-25T21:25:35.15 0.3 undecidable manual S 280 0.0773 139 -0.42 69
IV.ATLO.EHZ. 2020-11-25T21:25:35.72 0.3 undecidable manual S 235 0.0926 133 -0.26 71
IV.SSFR.HNZ. 2020-11-25T21:25:35.85 0.1 undecidable manual P 71 0.2077 113 -0.22 94
IV.ATVA.EHZ. 2020-11-25T21:25:35.96 0.3 undecidable manual P 241 0.188 115 0.3 70
IV.TB03.DHZ.01 2020-11-25T21:25:35.32 0.3 undecidable manual S 294 0.0809 138 -0.33 71
IV.ATPI.EHZ. 2020-11-25T21:25:34.39 0.1 undecidable manual P 316 0.1142 128 0.13 98
IV.ATBU.EHZ. 2020-11-25T21:25:34.30 0.3 undecidable manual P 14 0.1097 129 0.11 74
IV.ATPC.HNZ. 2020-11-25T21:25:34.46 0.3 undecidable manual P 340 0.1187 127 0.12 73
IV.ATSC.EHZ. 2020-11-25T21:25:34.64 0.1 undecidable manual P 66 0.1385 122 -0.06 99
IV.MURB.HHZ. 2020-11-25T21:25:34.14 0.1 undecidable manual P 175 0.1061 130 0.02 100
IV.ATVO.HHZ. 2020-11-25T21:25:33.48 0.1 undecidable manual P 280 0.0773 139 -0.19 97
IV.ATLO.EHZ. 2020-11-25T21:25:33.84 0.1 undecidable manual P 235 0.0926 133 -0.06 100
IV.TB03.DHZ.01 2020-11-25T21:25:33.57 0.1 undecidable manual P 294 0.0809 138 -0.14 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ATVO.HHE. ML:0.2 2.3818332E-5 0.0768 AML other m 2020-11-25T21:25:36.35
IV.ATVO.HHN. ML:0.6 5.6044755E-5 0.1024 AML other m 2020-11-25T21:25:35.29
IV.MURB.HHE. ML:0.9 9.527414E-5 0.2816 AML other m 2020-11-25T21:25:36.85
IV.MURB.HHN. ML:0.7 5.8283635E-5 0.2688 AML other m 2020-11-25T21:25:38.28
IV.ATPI.EHE. ML:0 1.00479875E-5 0.1536 AML other m 2020-11-25T21:25:37.35
IV.ATPI.EHN. ML:0 1.15694905E-5 0.1024 AML other m 2020-11-25T21:25:36.67
IV.APEC.HHE. ML:0.4 1.5090215E-5 0.1664 AML other m 2020-11-25T21:25:40.28
IV.APEC.HHN. ML:0.2 8.4895835E-6 0.32 AML other m 2020-11-25T21:25:43.80
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download