Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.6 on date 28-02-2023 and time 04:07:59 (UTC) in region 7 km N Valfabbrica (PG)

A magnitude ML 1.6 earthquake occured in region: 7 km N Valfabbrica (PG), on

  • 28-02-2023 04:07:59 (UTC)
  • 28-02-2023 05:07:59 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.2200, 12.5820 at 10 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 7 3389 3389
Gubbio PG 15 32216 35605
Gualdo Tadino PG 17 15208 50813
Assisi PG 17 28299 79112
Fossato di Vico PG 17 2840 81952
Bastia Umbra PG 17 21874 103826
Sigillo PG 18 2404 106230
Costacciaro PG 19 1216 107446

Municipalities with at least 50000 inhabitants

An earthquake occurred to
20 Km NE of Perugia (166134 inhabitants)
31 Km NW of Foligno (57155 inhabitants)
63 Km E of Arezzo (99543 inhabitants)
73 Km N of Terni (111501 inhabitants)
78 Km SW of Fano (60888 inhabitants)
81 Km SW of Pesaro (94582 inhabitants)
88 Km SW of Ancona (100861 inhabitants)
94 Km S of Rimini (147750 inhabitants)
97 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 1.6 2023-02-28
04:07:59		 43.2197 12.5823 10 2024-03-01
17:17:57		 Bollettino Sismico Italiano INGV 114961821
Reviewed
Rev100 		ML 1.6 2023-02-28
04:07:59		 43.2197 12.5772 10 2023-02-28
04:13:50		 Sala Sismica INGV-Roma 114871121
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-02-28 04:07:59 ± 0.04
Latitude 43.2197 ± 0.0018
Longitude 12.5823 ± 0.0037
Depth (km) 10 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 114961821

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 303
Semi-minor axis of confidence ellipse (meter) 148
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 233
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) 65
Number of associated phases, regardless of their use for origin computation 48
Number of defining phases 48
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) 0.05396
Epicentral distance of station farthest from the epicenter (degree) 0.68079
Number of stations at which the event was observed 28
Number of stations from which data was used for origin computation 28
Magnitudes information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.3
Num. used stations 24
Type of magnitude ML
Reference to an origin 114961821
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2023-03-03 11:37:32

ML:1.6

Field Value
Value 1.6
Uncertainty 0.3
Num. used stations 24
Type of magnitude ML
Reference to an origin 114871121
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-02-28 04:13:50
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CSP1.EHZ. 2023-02-28T04:08:16.94 0.3 undecidable manual S 106 52.3032 50 0.35 65
IV.FDMO.HHZ. 2023-02-28T04:08:15.11 0.6 undecidable manual S 116 45.621 50 0.31 44
IV.EL6.EHZ. 2023-02-28T04:08:14.45 0.6 undecidable manual S 74 43.623 50 0.17 46
IV.ARVD.HHZ. 2023-02-28T04:08:14.11 0.6 undecidable manual S 43 42.3243 50 0.19 46
IV.MF5.EHZ. 2023-02-28T04:08:13.21 0.3 undecidable manual P 110 75.5688 50 0.13 65
IV.CESI.HHZ. 2023-02-28T04:08:12.22 0.6 undecidable manual S 132 35.3424 50 0.17 46
IV.MML1.EHZ. 2023-02-28T04:08:11.62 0.6 undecidable manual S 110 33.6441 50 0.03 48
IV.PIEI.HHZ. 2023-02-28T04:08:11.99 0.6 undecidable manual S 354 35.2425 50 -0.04 47
IV.ATBU.EHZ. 2023-02-28T04:08:10.42 0.1 undecidable manual S 354 28.5492 50 0.18 93
IV.NRCA.HHZ. 2023-02-28T04:08:10.67 0.3 undecidable manual P 135 60.7947 50 -0.13 67
IV.SSFR.HHZ. 2023-02-28T04:08:10.04 0.6 undecidable manual S 34 28.9488 50 -0.3 45
IV.SNTG.HHZ. 2023-02-28T04:08:10.05 0.6 undecidable manual S 82 29.2485 50 -0.37 45
IV.ATPI.EHZ. 2023-02-28T04:08:10.33 0.6 undecidable manual S 330 29.4483 50 -0.15 47
IV.MGAB.HHZ. 2023-02-28T04:08:09.27 0.3 undecidable manual P 228 51.1155 50 -0.04 69
IV.CSP1.EHZ. 2023-02-28T04:08:09.53 0.1 undecidable manual P 106 52.3032 50 0.03 92
IV.EL6.EHZ. 2023-02-28T04:08:08.14 0.1 undecidable manual P 74 43.623 50 -0.02 94
IV.ATSC.EHZ. 2023-02-28T04:08:08.68 0.3 undecidable manual S 20 24.1536 111 -0.15 71
IV.FDMO.HHZ. 2023-02-28T04:08:08.27 0.1 undecidable manual P 116 45.621 50 -0.2 90
IV.NARO.HHZ. 2023-02-28T04:08:08.16 0.3 undecidable manual P 360 43.4232 50 0.04 70
IV.PIEI.HHZ. 2023-02-28T04:08:07.07 0.3 undecidable manual P 354 35.2425 50 0.2 69
IV.TB01.DHZ.01 2023-02-28T04:08:07.88 0.3 undecidable manual S 327 21.5673 114 -0.09 72
IV.ATVO.HHZ. 2023-02-28T04:08:07.96 0.6 undecidable manual S 322 22.9548 113 -0.47 44
IV.ARVD.HHZ. 2023-02-28T04:08:07.78 0.3 undecidable manual P 43 42.3243 50 -0.18 68
IV.ASSB.HHZ. 2023-02-28T04:08:07.43 0.6 undecidable manual S 163 20.5683 115 -0.25 47
IV.ATLO.EHZ. 2023-02-28T04:08:06.68 0.1 undecidable manual S 307 17.6712 118 -0.1 97
IV.FOSV.EHZ. 2023-02-28T04:08:06.46 0.6 undecidable manual S 60 16.6722 120 -0.01 49
IV.MML1.EHZ. 2023-02-28T04:08:06.40 0.3 undecidable manual P 110 33.6441 50 -0.22 69
IV.ATMI.HHZ. 2023-02-28T04:08:06.56 0.3 undecidable manual P 297 28.3494 50 0.75 59
IV.ATFO.HHZ. 2023-02-28T04:08:06.48 0.3 undecidable manual S 357 16.3725 120 0.11 73
IV.CESI.HHZ. 2023-02-28T04:08:06.83 0.1 undecidable manual P 132 35.3424 50 -0.05 95
IV.SNTG.HHZ. 2023-02-28T04:08:05.74 0.1 undecidable manual P 82 29.2485 50 -0.19 93
IV.ATPI.EHZ. 2023-02-28T04:08:05.90 0.3 undecidable manual P 330 29.4483 50 -0.07 72
IV.ATBU.EHZ. 2023-02-28T04:08:05.75 0.1 undecidable manual P 354 28.5492 50 -0.08 95
IV.SSFR.HHZ. 2023-02-28T04:08:05.59 0.1 undecidable manual P 34 28.9488 50 -0.3 91
IV.TB03.DHZ.01 2023-02-28T04:08:05.00 0.3 undecidable manual P 325 24.4533 111 -0.07 72
IV.ATSC.EHZ. 2023-02-28T04:08:05.17 0.1 undecidable manual P 20 24.1536 111 0.15 95
IV.MURB.HHZ. 2023-02-28T04:08:04.02 0.6 undecidable manual S 316 6.6933 145 0.17 49
IV.TB02.DHZ.01 2023-02-28T04:08:04.57 0.1 undecidable manual P 320 21.7671 114 0 98
IV.ASSB.HHZ. 2023-02-28T04:08:04.31 0.3 positive manual P 163 20.5683 115 -0.05 73
IV.TB01.DHZ.01 2023-02-28T04:08:04.53 0.1 undecidable manual P 327 21.5673 114 0 98
IV.ATVO.HHZ. 2023-02-28T04:08:04.82 0.1 undecidable manual P 322 22.9548 113 0.03 97
IV.ATVA.EHZ. 2023-02-28T04:08:04.92 0.3 undecidable manual P 285 24.8529 111 -0.23 70
IV.ATFO.HHZ. 2023-02-28T04:08:03.83 0.3 undecidable manual P 357 16.3725 120 0.23 71
IV.ATLO.EHZ. 2023-02-28T04:08:03.82 0.1 undecidable manual P 307 17.6712 118 -0.01 99
IV.FOSV.EHZ. 2023-02-28T04:08:03.76 0.1 undecidable manual P 60 16.6722 120 0.1 97
IV.ATCC.EHZ. 2023-02-28T04:08:03.68 0.1 undecidable manual S 129 5.994 148 -0.04 100
IV.ATCC.EHZ. 2023-02-28T04:08:02.21 0.1 undecidable manual P 129 5.994 148 0.14 98
IV.MURB.HHZ. 2023-02-28T04:08:02.38 0.1 undecidable manual P 316 6.6933 145 0.24 96
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ATCC.HNN. ML:2.1 0.001935 1.66 AML other m 2023-02-28T04:08:04.89
IV.ATCC.EHN. ML:2.0 0.001815 1.66 AML other m 2023-02-28T04:08:04.90
IV.ATCC.EHE. ML:2.0 0.00163 1.72 AML other m 2023-02-28T04:08:04.12
IV.ATCC.HNE. ML:2.0 0.0018050000000000002 1.66 AML other m 2023-02-28T04:08:04.12
IV.MURB.HHN. ML:2.1 0.0021100000000000003 0.3 AML other m 2023-02-28T04:08:04.17
IV.MURB.HNN. ML:2.1 0.0019249999999999998 0.24 AML other m 2023-02-28T04:08:04.17
IV.MURB.HHE. ML:2.3 0.0033 0.32 AML other m 2023-02-28T04:08:04.37
IV.MURB.HNE. ML:2.3 0.00316 0.36 AML other m 2023-02-28T04:08:04.20
IV.FOSV.EHN. ML:1.1 0.00011599999999999999 0.98 AML other m 2023-02-28T04:08:06.20
IV.FOSV.EHE. ML:1.3 0.000174 1.28 AML other m 2023-02-28T04:08:06.08
IV.ATFO.HHE. ML:1.3 0.000166 0.8 AML other m 2023-02-28T04:08:06.54
IV.ASSB.HHN. ML:1.6 0.000258 0.16 AML other m 2023-02-28T04:08:08.08
IV.ATFO.HHN. ML:1.2 0.000147 0.76 AML other m 2023-02-28T04:08:08.56
IV.ASSB.HHE. ML:1.4 0.00019800000000000002 0.5 AML other m 2023-02-28T04:08:08.88
IV.SNTG.HHE. ML:1.5 0.0001529 0.28 AML other m 2023-02-28T04:08:10.51
IV.SNTG.HHN. ML:1.7 0.0002585 0.4 AML other m 2023-02-28T04:08:10.44
IV.SSFR.HHN. ML:1.8 0.000309 0.58 AML other m 2023-02-28T04:08:11.58
IV.ATMI.HHN. ML:1.3 0.00010545 0.58 AML other m 2023-02-28T04:08:11.81
IV.SSFR.HHE. ML:1.7 0.000246 0.14 AML other m 2023-02-28T04:08:11.80
IV.ATMI.HHE. ML:1.6 0.0001875 0.86 AML other m 2023-02-28T04:08:11.97
IV.MML1.EHN. ML:1.4 0.00009755 1.16 AML other m 2023-02-28T04:08:12.21
IV.PIEI.HHN. ML:1.5 0.00011635 1.66 AML other m 2023-02-28T04:08:12.06
IV.PIEI.HHE. ML:1.4 0.0001116 1.86 AML other m 2023-02-28T04:08:12.96
IV.MML1.EHE. ML:1.5 0.00012255 0.42 AML other m 2023-02-28T04:08:13.47
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