Istituto Nazionale di Geofisica e Vulcanologia

Earthquake (quarry blast) with magnitude of ML 0.8 on date 20-01-2023 and time 09:51:14 (Italy) in region 4 km NW Gubbio (PG)

A magnitude ML 0.8 (quarry blast) earthquake occured in region: 4 km NW Gubbio (PG), on

  • 20-01-2023 08:51:14 (UTC)
  • 20-01-2023 09:51:14 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.3900, 12.5630 at 0 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

Event type: quarry blast.

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
Scheggia e Pascelupo PG 9 1393 33609
Cantiano PU 11 2245 35854
Pietralunga PG 12 2111 37965
Costacciaro PG 13 1216 39181
Sigillo PG 16 2404 41585
Cagli PU 19 8731 50316
Montone PG 19 1680 51996
Fossato di Vico PG 19 2840 54836
Frontone PU 20 1300 56136

Municipalities with at least 50000 inhabitants

An earthquake occurred to
34 Km NE of Perugia (166134 inhabitants)
50 Km N of Foligno (57155 inhabitants)
56 Km E of Arezzo (99543 inhabitants)
63 Km SW of Fano (60888 inhabitants)
64 Km SW of Pesaro (94582 inhabitants)
75 Km S of Rimini (147750 inhabitants)
81 Km W of Ancona (100861 inhabitants)
87 Km SE of Cesena (96758 inhabitants)
92 Km N of Terni (111501 inhabitants)
100 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 0.8 2023-01-20
08:51:14		 43.3902 12.5633 1 2024-03-01
17:18:14		 Bollettino Sismico Italiano INGV 119926601
Reviewed
Rev100 		ML 0.8 2023-01-20
08:51:14		 43.3788 12.5702 4 2023-01-20
09:10:12		 Sala Sismica INGV-Roma 113696591
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-01-20 08:51:14 ± 0.08
Latitude 43.3902 ± 0.0054
Longitude 12.5633 ± 0.0062
Depth (km) 1 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type quarry blast
Origin ID 119926601

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 610
Semi-minor axis of confidence ellipse (meter) 500
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 336
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) 92
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) 0.27
Epicentral distance of station closest to the epicenter (degree) 0.02428
Epicentral distance of station farthest from the epicenter (degree) 0.17357
Number of stations at which the event was observed 15
Number of stations from which data was used for origin computation 15
Magnitudes information

ML:0.8

Field Value
Value 0.8
Uncertainty 0.1
Num. used stations 4
Type of magnitude ML
Reference to an origin 119926601
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2023-08-07 16:44:02

ML:0.8

Field Value
Value 0.8
Uncertainty 0.1
Num. used stations 4
Type of magnitude ML
Reference to an origin 113696591
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-01-20 09:10:12
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.SSFR.HHZ. 2023-01-20T08:51:18.18 0.1 undecidable manual P 74 18.3705 92 0.06 97
IV.MURB.HHZ. 2023-01-20T08:51:17.46 0.1 undecidable manual P 192 14.4744 92 0.12 97
IV.ATPI.EHZ. 2023-01-20T08:51:17.33 0.1 undecidable manual P 297 14.5743 92 -0.04 98
IV.ATLO.HNE. 2023-01-20T08:51:17.44 0.1 undecidable manual P 237 15.0738 92 -0.03 98
IV.ATPC.HNN. 2023-01-20T08:51:17.08 0.1 undecidable manual P 320 13.1757 92 0 99
IV.PIEI.HHZ. 2023-01-20T08:51:17.82 0.1 undecidable manual P 352 16.2726 92 0.12 96
IV.FRON.EHZ. 2023-01-20T08:51:17.44 0.1 undecidable manual P 43 19.2696 91 -0.86 76
IV.TB02.DHN.01 2023-01-20T08:51:16.97 0.1 undecidable manual P 260 12.5763 92 0 99
IV.TB03.DHZ.01 2023-01-20T08:51:16.87 0.3 undecidable manual P 276 12.3765 92 -0.05 74
IV.ATSC.EHE. 2023-01-20T08:51:16.89 0.1 undecidable manual P 69 10.5783 93 0.32 93
IV.ATBU.HNN. 2023-01-20T08:51:16.73 0.1 undecidable manual P 353 9.5793 93 0.37 92
IV.ATVO.HHZ. 2023-01-20T08:51:16.87 0.1 undecidable manual P 266 12.6762 92 -0.11 97
IV.TB01.DHZ.01 2023-01-20T08:51:16.62 0.3 undecidable manual P 265 10.3785 93 0.11 73
IV.TSM2.DHE.01 2023-01-20T08:51:15.55 0.1 undecidable manual P 277 5.994 95 -0.09 99
IV.ATFO.HHZ. 2023-01-20T08:51:14.94 0.1 undecidable manual P 166 2.6973 100 -0.05 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ATPI.EHE. ML:0.9 0.00010449999999999999 0.42 AML other m 2023-01-20T08:51:23.00
IV.PIEI.HHE. ML:0.8 0.0000616 1.08 AML other m 2023-01-20T08:51:24.20
IV.ATPI.EHN. ML:0.8 0.0000781 0.62 AML other m 2023-01-20T08:51:24.10
IV.PIEI.HHN. ML:0.7 0.0000494 0.52 AML other m 2023-01-20T08:51:25.50
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