Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.0 on date 25-12-2020 and time 11:29:46 (Italy) in region 8 km W Gubbio (PG)

A magnitude ML 1.0 earthquake occured in region: 8 km W Gubbio (PG), on

  • 25-12-2020 10:29:46 (UTC)
  • 25-12-2020 11:29:46 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.3740, 12.4870 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 8 32216 32216
Pietralunga PG 9 2111 34327
Montone PG 13 1680 36007
Umbertide PG 15 16681 52688
Scheggia e Pascelupo PG 15 1393 54081
Cantiano PU 16 2245 56326
Costacciaro PG 18 1216 57542

Municipalities with at least 50000 inhabitants

An earthquake occurred to
31 Km N of Perugia (166134 inhabitants)
50 Km NW of Foligno (57155 inhabitants)
50 Km E of Arezzo (99543 inhabitants)
68 Km SW of Fano (60888 inhabitants)
69 Km SW of Pesaro (94582 inhabitants)
77 Km S of Rimini (147750 inhabitants)
87 Km S of Cesena (96758 inhabitants)
88 Km W of Ancona (100861 inhabitants)
91 Km N of Terni (111501 inhabitants)
94 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
Reviewed
Rev100 		ML 1.0 2020-12-25
10:29:46		 43.3738 12.4867 10 2020-12-25
11:02:18		 Sala Sismica INGV-Roma 85704061
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-12-25 10:29:46 ± 0.09
Latitude 43.3738 ± 0.0045
Longitude 12.4867 ± 0.0074
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 85704061

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 609
Semi-minor axis of confidence ellipse (meter) 440
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 113
Circular confidence region, given by single value of horizontal uncertainty (meter) 610.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 95
Number of associated phases, regardless of their use for origin computation 15
Number of defining phases 15
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) 0.05846
Epicentral distance of station farthest from the epicenter (degree) 0.24641
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 9
Magnitude information

ML:1.0

Field Value
Value 1.0
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 85704061
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-12-25 11:02:18
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.BADI.EHZ. 2020-12-25T10:29:55.59 0.6 undecidable manual S 308 24.6531 112 0.23 47
IV.NARO.HHZ. 2020-12-25T10:29:55.57 0.6 undecidable manual S 16 27.3504 50 -0.52 45
IV.PIEI.HHZ. 2020-12-25T10:29:53.50 0.6 undecidable manual S 12 18.3705 119 0.12 49
IV.NARO.HHZ. 2020-12-25T10:29:51.56 1.0 positive manual P 16 27.3504 50 -0.32 23
IV.ATBU.EHE. 2020-12-25T10:29:51.72 0.6 undecidable manual S 24 12.3765 129 0.07 50
IV.BADI.EHZ. 2020-12-25T10:29:51.69 0.3 negative manual P 308 24.6531 112 0.24 70
IV.ATPC.HNE. 2020-12-25T10:29:51.63 0.6 undecidable manual S 349 12.0768 130 0.05 50
IV.ATVA.EHN. 2020-12-25T10:29:50.27 1.0 undecidable manual P 237 19.3695 117 -0.22 24
IV.ATSC.EHN. 2020-12-25T10:29:50.08 0.6 undecidable manual P 71 17.0718 121 0 50
IV.PIEI.HHZ. 2020-12-25T10:29:50.23 0.6 negative manual P 12 18.3705 119 -0.08 49
IV.MURB.HHZ. 2020-12-25T10:29:49.45 0.1 negative manual P 166 12.6762 129 0.09 99
IV.ATVO.HHZ. 2020-12-25T10:29:49.89 0.6 undecidable manual S 278 6.4935 147 -0.39 47
IV.ATBU.EHE. 2020-12-25T10:29:49.40 0.1 undecidable manual P 24 12.3765 129 0.09 99
IV.ATPC.HNE. 2020-12-25T10:29:49.36 0.1 undecidable manual P 349 12.0768 130 0.09 99
IV.ATVO.HHZ. 2020-12-25T10:29:48.43 0.1 undecidable manual P 278 6.4935 147 -0.09 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ATVO.HHE. ML:1.1 0.00017571805000000002 0.1408 AML other m 2020-12-25T10:29:50.00
IV.ATVO.HHN. ML:0.9 0.000120062585 0.1216 AML other m 2020-12-25T10:29:49.93
IV.MURB.HHE. ML:1.2 0.00016280017500000003 0.2176 AML other m 2020-12-25T10:29:52.87
IV.MURB.HHN. ML:0.9 0.00008833387500000001 0.1792 AML other m 2020-12-25T10:29:52.38
IV.MURB.HNE. ML:1.1 0.00014359428 0.2112 AML other m 2020-12-25T10:29:52.89
IV.MURB.HNN. ML:1.0 0.00011345854499999999 0.224 AML other m 2020-12-25T10:29:52.38
IV.PIEI.HHE. ML:0.8 0.000053105399999999995 0.2368 AML other m 2020-12-25T10:29:54.28
IV.PIEI.HHN. ML:0.6 0.00003456629 0.2048 AML other m 2020-12-25T10:29:54.06
IV.BADI.EHE. ML:1.1 0.00007826493500000001 2.6368 AML other m 2020-12-25T10:29:55.68
IV.BADI.EHN. ML:0.8 0.00003368826 0.1984 AML other m 2020-12-25T10:29:55.64
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