Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.2 on date 11-02-2023 and time 02:56:23 (UTC) in region 4 km E Valfabbrica (PG)

A magnitude ML 1.2 earthquake occured in region: 4 km E Valfabbrica (PG), on

  • 11-02-2023 02:56:23 (UTC)
  • 11-02-2023 03:56:23 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.1460, 12.6510 at 11 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

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
Valfabbrica PG 4 3389 3389
Assisi PG 9 28299 31688
Bastia Umbra PG 12 21874 53562
Nocera Umbra PG 12 5839 59401
Valtopina PG 13 1398 60799
Gualdo Tadino PG 15 15208 76007
Spello PG 17 8645 84652
Cannara PG 18 4305 88957
Fossato di Vico PG 19 2840 91797
Bettona PG 20 4367 96164

Municipalities with at least 50000 inhabitants

An earthquake occurred to
22 Km N of Foligno (57155 inhabitants)
22 Km E of Perugia (166134 inhabitants)
65 Km N of Terni (111501 inhabitants)
72 Km SE of Arezzo (99543 inhabitants)
83 Km SW of Fano (60888 inhabitants)
88 Km SW of Ancona (100861 inhabitants)
88 Km S of Pesaro (94582 inhabitants)
92 Km NE of Viterbo (67173 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 1.2 2023-02-11
02:56:23		 43.1458 12.6513 11 2024-03-01
17:18:08		 Bollettino Sismico Italiano INGV 117289271
Reviewed
Rev100 		ML 1.2 2023-02-11
02:56:23		 43.1423 12.659 11 2023-02-11
03:06:17		 Sala Sismica INGV-Roma 114332221
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-02-11 02:56:23 ± 0.04
Latitude 43.1458 ± 0.0027
Longitude 12.6513 ± 0.0025
Depth (km) 11 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 117289271

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 299
Semi-minor axis of confidence ellipse (meter) 111
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 35
Circular confidence region, given by single value of horizontal uncertainty (meter) 300.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 124
Number of associated phases, regardless of their use for origin computation 43
Number of defining phases 43
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.14
Epicentral distance of station closest to the epicenter (degree) 0.04047
Epicentral distance of station farthest from the epicenter (degree) 0.45775
Number of stations at which the event was observed 22
Number of stations from which data was used for origin computation 22
Magnitudes information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 117289271
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2023-05-12 13:19:01

ML:1.2

Field Value
Value 1.2
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 114332221
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-02-11 03:06:17
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CING.HHZ. 2023-02-11T02:56:39.91 0.6 undecidable manual S 60 50.8158 50 0.45 42
IV.CSP1.EHZ. 2023-02-11T02:56:38.63 0.6 undecidable manual S 97 45.2214 50 0.66 39
IV.ATPI.EHE. 2023-02-11T02:56:36.50 0.6 undecidable manual S 329 39.3273 50 0.09 46
IV.FDMO.HHZ. 2023-02-11T02:56:36.01 0.6 undecidable manual S 109 37.3293 50 0.14 46
IV.MOMA.HNZ. 2023-02-11T02:56:36.59 0.6 undecidable manual S 190 38.5281 50 0.41 43
IV.TSM3.DHE.01 2023-02-11T02:56:35.40 0.6 undecidable manual S 318 35.5422 50 0.01 47
IV.TB03.DHZ.01 2023-02-11T02:56:35.22 0.6 undecidable manual S 326 34.4433 50 0.14 46
IV.TB01.DHZ.01 2023-02-11T02:56:34.35 0.3 undecidable manual S 326 31.4463 50 0.06 71
IV.ATSC.EHE. 2023-02-11T02:56:34.50 0.6 undecidable manual S 5 30.9468 50 0.32 45
IV.TB02.DHZ.01 2023-02-11T02:56:34.31 0.3 undecidable manual S 322 31.6461 50 -0.05 71
IV.SSFR.HHZ. 2023-02-11T02:56:34.93 0.6 undecidable manual S 18 33.9438 50 -0.03 47
IV.ATVO.HHN. 2023-02-11T02:56:34.49 0.3 undecidable manual S 323 32.8449 50 -0.18 69
IV.TSM2.DHN.01 2023-02-11T02:56:33.99 0.6 undecidable manual S 335 30.747 50 -0.11 47
IV.MML1.EHZ. 2023-02-11T02:56:32.79 0.3 undecidable manual S 98 26.1516 50 -0.1 71
IV.ATLO.EHE. 2023-02-11T02:56:32.97 0.3 undecidable manual S 314 27.2505 50 -0.21 69
IV.ATFO.HHN. 2023-02-11T02:56:32.99 0.6 undecidable manual S 345 25.3524 50 0.32 45
IV.SNTG.HHZ. 2023-02-11T02:56:32.80 0.1 undecidable manual S 63 26.3514 50 -0.13 94
IV.CING.HHZ. 2023-02-11T02:56:32.77 0.6 undecidable manual P 60 50.8158 50 0.11 45
IV.CESI.HHZ. 2023-02-11T02:56:32.52 0.3 undecidable manual S 127 25.752 50 -0.27 69
IV.CSP1.EHZ. 2023-02-11T02:56:31.90 1.0 undecidable manual P 97 45.2214 50 0.1 23
IV.PIEI.HHZ. 2023-02-11T02:56:31.70 0.3 undecidable manual P 348 44.2224 50 0.05 69
IV.ATPI.EHE. 2023-02-11T02:56:31.01 0.3 undecidable manual P 329 39.3273 50 0.12 69
IV.TB03.DHZ.01 2023-02-11T02:56:30.04 0.3 undecidable manual P 326 34.4433 50 -0.09 70
IV.SSFR.HHZ. 2023-02-11T02:56:30.03 0.6 positive manual P 18 33.9438 50 -0.02 47
IV.MURB.HHZ. 2023-02-11T02:56:30.22 0.1 undecidable manual S 322 16.5723 123 0.02 98
IV.MOMA.HNZ. 2023-02-11T02:56:30.79 0.6 undecidable manual P 190 38.5281 50 0.03 47
IV.FOSV.EHZ. 2023-02-11T02:56:30.68 0.1 undecidable manual S 28 18.7701 120 -0.17 94
IV.TSM3.DHE.01 2023-02-11T02:56:30.25 0.3 undecidable manual P 318 35.5422 50 -0.06 70
IV.FDMO.HHZ. 2023-02-11T02:56:30.45 0.3 undecidable manual P 109 37.3293 50 -0.13 69
IV.ATSC.EHE. 2023-02-11T02:56:29.53 0.3 undecidable manual P 5 30.9468 50 -0.07 71
IV.TB02.DHZ.01 2023-02-11T02:56:29.67 0.3 undecidable manual P 322 31.6461 50 -0.04 71
IV.ATVO.HHN. 2023-02-11T02:56:29.82 0.3 undecidable manual P 323 32.8449 50 -0.07 71
IV.TB01.DHZ.01 2023-02-11T02:56:29.60 0.3 undecidable manual P 326 31.4463 50 -0.07 71
IV.TSM2.DHN.01 2023-02-11T02:56:29.51 0.3 undecidable manual P 335 30.747 50 -0.05 71
IV.CESI.HHZ. 2023-02-11T02:56:28.62 0.3 undecidable manual P 127 25.752 50 -0.18 70
IV.MML1.EHZ. 2023-02-11T02:56:28.72 0.1 undecidable manual P 98 26.1516 50 -0.14 94
IV.ATLO.EHE. 2023-02-11T02:56:28.95 0.3 undecidable manual P 314 27.2505 50 -0.08 71
IV.ATFO.HHN. 2023-02-11T02:56:28.91 0.6 undecidable manual P 345 25.3524 50 0.18 47
IV.SNTG.HHZ. 2023-02-11T02:56:28.82 0.1 undecidable manual P 63 26.3514 50 -0.07 95
IV.ATCC.EHZ. 2023-02-11T02:56:27.39 0.1 undecidable manual S 348 4.4955 157 0.01 100
IV.MURB.HHZ. 2023-02-11T02:56:27.37 0.1 undecidable manual P 322 16.5723 123 0.06 97
IV.FOSV.EHZ. 2023-02-11T02:56:27.74 0.1 undecidable manual P 28 18.7701 120 0.05 97
IV.ATCC.EHZ. 2023-02-11T02:56:25.84 0.1 undecidable manual P 348 4.4955 157 0.16 97
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ATCC.EHN. ML:1.2 0.0002595 0.14 AML other m 2023-02-11T02:56:27.59
IV.ATCC.EHE. ML:1.2 0.0002385 0.28 AML other m 2023-02-11T02:56:27.52
IV.FOSV.EHE. ML:0.9 0.0000621 0.38 AML other m 2023-02-11T02:56:31.12
IV.FOSV.EHN. ML:0.9 0.00006469999999999999 0.52 AML other m 2023-02-11T02:56:31.03
IV.MURB.HHE. ML:1.4 0.00023199999999999997 0.18 AML other m 2023-02-11T02:56:31.43
IV.MURB.HHN. ML:1.4 0.0002165 0.44 AML other m 2023-02-11T02:56:31.73
IV.MML1.EHN. ML:0.9 0.0000406 0.24 AML other m 2023-02-11T02:56:33.14
IV.MML1.EHE. ML:1.2 0.00007924999999999999 0.42 AML other m 2023-02-11T02:56:33.99
IV.SSFR.HHE. ML:1.5 0.00013550000000000001 0.22 AML other m 2023-02-11T02:56:35.31
IV.SSFR.HHN. ML:1.4 0.0001095 0.2 AML other m 2023-02-11T02:56:35.62
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