Earthquake (quarry blast) with magnitude of ML 1.0 on date 20-02-2023 and time 09:36:28 (UTC) in region 4 km N Gubbio (PG)

A magnitude ML 1.0 (quarry blast) earthquake occured in region: 4 km N Gubbio (PG), on

  • 20-02-2023 09:36:28 (UTC)
  • 20-02-2023 10:36:28 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.3920, 12.5660 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.

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 12 1216 39181
Sigillo PG 16 2404 41585
Cagli PU 19 8731 50316
Fossato di Vico PG 19 2840 53156
Montone PG 19 1680 54836
Frontone PU 20 1300 56136

Municipalities with at least 50000 inhabitants

An earthquake occurred to
35 Km NE of Perugia (166134 inhabitants)
50 Km N of Foligno (57155 inhabitants)
56 Km E of Arezzo (99543 inhabitants)
62 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)
93 Km N of Terni (111501 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 1.0 2023-02-20
09:36:28
43.3918 12.5655 1 2024-03-01
17:18:17
Bollettino Sismico Italiano INGV 122757291
Reviewed
Rev100
ML 1.1 2023-02-20
09:36:28
43.3883 12.5828 0 2023-02-20
09:45:06
Sala Sismica INGV-Roma 114620061
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-02-20 09:36:28 ± 0.06
Latitude 43.3918 ± 0.0036
Longitude 12.5655 ± 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 122757291

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 490
Semi-minor axis of confidence ellipse (meter) 400
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 277
Circular confidence region, given by single value of horizontal uncertainty (meter) 490.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 96
Number of associated phases, regardless of their use for origin computation 9
Number of defining phases 9
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) 0.02518
Epicentral distance of station farthest from the epicenter (degree) 0.27609
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 9
Magnitudes information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 14
Type of magnitude ML
Reference to an origin 114620061
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-02-20 09:45:06

ML:1.0

Field Value
Value 1.0
Uncertainty 0.2
Num. used stations 14
Type of magnitude ML
Reference to an origin 122757291
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2023-11-04 09:17:09
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MPAG.EHZ. 2023-02-20T09:36:34.18 0.3 undecidable manual P 31 30.6471 91 -0.13 71
IV.BADI.EHZ. 2023-02-20T09:36:33.77 0.3 undecidable manual P 297 28.9488 91 -0.22 70
IV.NARO.HHZ. 2023-02-20T09:36:33.03 0.3 undecidable manual P 3 24.3534 91 -0.02 74
IV.SSFR.HHZ. 2023-02-20T09:36:31.87 0.3 undecidable manual P 74 18.1707 92 0.05 74
IV.ATPI.EHZ. 2023-02-20T09:36:31.12 0.3 undecidable manual P 296 14.6742 92 0 75
IV.PIEI.HHZ. 2023-02-20T09:36:31.61 0.1 undecidable manual P 351 16.1727 92 0.19 96
IV.MURB.HHZ. 2023-02-20T09:36:31.34 0.1 undecidable manual P 193 14.6742 92 0.22 96
IV.ATVO.HHZ. 2023-02-20T09:36:30.78 0.1 undecidable manual P 265 12.876 92 0.02 100
IV.ATFO.HHZ. 2023-02-20T09:36:28.57 0.1 undecidable manual P 170 2.7972 100 -0.19 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MURB.HHN. ML:1.4 0.0003005 0.32 AML other m 2023-02-20T09:36:34.80
IV.MURB.HHE. ML:1.3 0.00026450000000000003 0.78 AML other m 2023-02-20T09:36:34.91
IV.PIEI.HHE. ML:1.1 0.00014800000000000002 1.72 AML other m 2023-02-20T09:36:35.04
IV.ATVO.HHE. ML:0.8 0.00008525098 1.7184 AML other m 2023-02-20T09:36:36.97
IV.SSFR.HHE. ML:1.1 0.00011169999999999999 0.2 AML other m 2023-02-20T09:36:36.24
IV.SSFR.HHN. ML:1.1 0.00011899999999999999 0.6 AML other m 2023-02-20T09:36:37.83
IV.ATVO.HHN. ML:0.8 0.000089290395 0.4608 AML other m 2023-02-20T09:36:37.64
IV.ATPI.EHN. ML:1.0 0.00010850000000000001 0.82 AML other m 2023-02-20T09:36:38.87
IV.PIEI.HHN. ML:0.9 0.00009665 0.98 AML other m 2023-02-20T09:36:39.01
IV.BADI.EHE. ML:1.2 0.00007985 0.32 AML other m 2023-02-20T09:36:39.55
IV.BADI.EHN. ML:1.3 0.00010155 0.38 AML other m 2023-02-20T09:36:39.59
IV.ATPI.EHE. ML:1.2 0.000168 1.06 AML other m 2023-02-20T09:36:40.42
IV.NARO.HHE. ML:0.7 0.00003705 0.96 AML other m 2023-02-20T09:36:41.26
IV.NARO.HHN. ML:0.7 0.00003665 0.86 AML other m 2023-02-20T09:36:43.18
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