Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.0 on date 31-01-2023 and time 20:50:17 (Italy) in region 2 km E Fossato di Vico (PG)

A magnitude ML 1.0 earthquake occured in region: 2 km E Fossato di Vico (PG), on

  • 31-01-2023 19:50:17 (UTC)
  • 31-01-2023 20:50:17 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.3030, 12.7820 at 11 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
Fossato di Vico PG 2 2840 2840
Sigillo PG 5 2404 5244
Gualdo Tadino PG 8 15208 20452
Costacciaro PG 8 1216 21668
Fabriano AN 11 31480 53148
Scheggia e Pascelupo PG 15 1393 54541
Esanatoglia MC 15 2034 56575
Sassoferrato AN 16 7285 63860
Cerreto d'Esi AN 17 3817 67677
Gubbio PG 17 32216 99893
Fiuminata MC 18 1402 101295
Genga AN 19 1797 103092
Matelica MC 19 9981 113073

Municipalities with at least 50000 inhabitants

An earthquake occurred to
39 Km NE of Perugia (166134 inhabitants)
39 Km N of Foligno (57155 inhabitants)
63 Km SW of Fano (60888 inhabitants)
69 Km S of Pesaro (94582 inhabitants)
69 Km SW of Ancona (100861 inhabitants)
75 Km E of Arezzo (99543 inhabitants)
83 Km N of Terni (111501 inhabitants)
86 Km S of Rimini (147750 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 2023-01-31
19:50:17		 43.3028 12.7818 11 2023-01-31
20:21:56		 Sala Sismica INGV-Roma 113943411
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-01-31 19:50:17 ± 0.08
Latitude 43.3028 ± 0.0036
Longitude 12.7818 ± 0.0074
Depth (km) 11 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 113943411

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 560
Semi-minor axis of confidence ellipse (meter) 360
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 259
Circular confidence region, given by single value of horizontal uncertainty (meter) 560.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 112
Number of associated phases, regardless of their use for origin computation 19
Number of defining phases 19
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.24
Epicentral distance of station closest to the epicenter (degree) 0.01709
Epicentral distance of station farthest from the epicenter (degree) 0.34714
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 10
Magnitude information

ML:1.0

Field Value
Value 1.0
Uncertainty 0.2
Num. used stations 4
Type of magnitude ML
Reference to an origin 113943411
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-01-31 20:21:56
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.NARO.HHZ. 2023-01-31T19:50:31.43 0.6 undecidable manual S 335 0.3408 90 0.96 34
IV.FDMO.HHZ. 2023-01-31T19:50:30.72 0.6 undecidable manual S 140 0.3471 90 0.06 47
IV.PIEI.HHZ. 2023-01-31T19:50:29.04 0.6 undecidable manual S 322 0.2932 90 -0.04 48
IV.FRON.EHZ. 2023-01-31T19:50:26.49 0.3 undecidable manual S 349 0.2185 90 -0.36 69
IV.ATFO.HHZ. 2023-01-31T19:50:25.22 0.6 undecidable manual S 293 0.1655 90 -0.07 48
IV.NARO.HHZ. 2023-01-31T19:50:25.85 0.3 undecidable manual P 335 0.3408 90 0.69 59
IV.ATCC.EHZ. 2023-01-31T19:50:25.03 0.6 undecidable manual S 221 0.1565 90 0.01 48
IV.FDMO.HHZ. 2023-01-31T19:50:25.01 1.0 negative manual P 140 0.3471 90 -0.27 23
IV.PIEI.HHZ. 2023-01-31T19:50:24.05 0.1 undecidable manual P 322 0.2932 90 -0.32 91
IV.CESI.HHZ. 2023-01-31T19:50:24.33 0.6 negative manual P 163 0.3112 90 -0.33 44
IV.SSFR.HHZ. 2023-01-31T19:50:24.47 0.6 undecidable manual S 0 0.1331 90 0.14 47
IV.SNTG.HHZ. 2023-01-31T19:50:23.89 0.6 undecidable manual S 112 0.1250 91 -0.19 48
IV.ATFO.HHZ. 2023-01-31T19:50:22.14 1.0 negative manual P 293 0.1655 90 -0.03 24
IV.FRON.EHZ. 2023-01-31T19:50:22.85 1.0 undecidable manual P 349 0.2185 90 -0.23 24
IV.SSFR.HHZ. 2023-01-31T19:50:21.56 0.1 undecidable manual P 0 0.1331 90 -0.06 99
IV.FOSV.EHZ. 2023-01-31T19:50:21.88 0.6 undecidable manual S 242 0.0171 167 0.06 50
IV.ATCC.EHZ. 2023-01-31T19:50:21.97 0.1 undecidable manual P 221 0.1565 90 -0.05 96
IV.SNTG.HHZ. 2023-01-31T19:50:21.40 0.3 positive manual P 112 0.1250 91 -0.08 74
IV.FOSV.EHZ. 2023-01-31T19:50:20.24 0.1 negative manual P 242 0.0171 167 0.07 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FOSV.EHE. ML:0.8 0.0001009 0.26 AML other m 2023-01-31T19:50:21.97
IV.FOSV.EHN. ML:1.0 0.000171 1.78 AML other m 2023-01-31T19:50:21.95
IV.SSFR.HHN. ML:1.2 0.00014150000000000002 0.16 AML other m 2023-01-31T19:50:24.68
IV.SSFR.HHE. ML:1.1 0.0001175 0.4 AML other m 2023-01-31T19:50:24.63
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