Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.9 on date 11-03-2023 and time 16:31:10 (UTC) in region 9 km SE Umbertide (PG)

A magnitude ML 0.9 earthquake occured in region: 9 km SE Umbertide (PG), on

  • 11-03-2023 16:31:10 (UTC)
  • 11-03-2023 17:31:10 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.2560, 12.4160 at 8 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
Umbertide PG 9 16681 16681
Montone PG 14 1680 18361
Perugia PG 17 166134 184495
Gubbio PG 17 32216 216711
Corciano PG 18 21332 238043
Valfabbrica PG 19 3389 241432

Municipalities with at least 50000 inhabitants

An earthquake occurred to
17 Km N of Perugia (166134 inhabitants)
41 Km NW of Foligno (57155 inhabitants)
49 Km E of Arezzo (99543 inhabitants)
80 Km N of Terni (111501 inhabitants)
82 Km SW of Fano (60888 inhabitants)
83 Km SW of Pesaro (94582 inhabitants)
88 Km E of Siena (53903 inhabitants)
90 Km S of Rimini (147750 inhabitants)
97 Km N of Viterbo (67173 inhabitants)
98 Km W of Ancona (100861 inhabitants)
99 Km S of Cesena (96758 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 0.9 2023-03-11
16:31:10		 43.256 12.4157 8 2024-03-01
17:18:10		 Bollettino Sismico Italiano INGV 117845961
Reviewed
Rev100 		ML 0.8 2023-03-11
16:31:10		 43.2622 12.4187 7 2023-03-11
16:43:41		 Sala Sismica INGV-Roma 115258451
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-03-11 16:31:10 ± 0.07
Latitude 43.2560 ± 0.0027
Longitude 12.4157 ± 0.0037
Depth (km) 8 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 117845961

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 317
Semi-minor axis of confidence ellipse (meter) 215
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 245
Circular confidence region, given by single value of horizontal uncertainty (meter) 320.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 73
Number of associated phases, regardless of their use for origin computation 34
Number of defining phases 32
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) 0.05936
Epicentral distance of station farthest from the epicenter (degree) 0.40829
Number of stations at which the event was observed 19
Number of stations from which data was used for origin computation 18
Magnitudes information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.3
Num. used stations 8
Type of magnitude ML
Reference to an origin 117845961
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2023-05-29 10:51:42

ML:0.8

Field Value
Value 0.8
Uncertainty 0.4
Num. used stations 14
Type of magnitude ML
Reference to an origin 115258451
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-03-11 16:43:41
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.SSFR.HHZ. 2023-03-11T16:31:21.86 3.0 undecidable manual S 35.742 -1 0
IV.ASSB.HHZ. 2023-03-11T16:31:20.85 0.6 undecidable manual S 140 30.747 105 -0.44 44
IV.ATSC.EHZ. 2023-03-11T16:31:20.73 0.6 undecidable manual S 49 28.749 106 0.13 47
IV.ATBU.EHZ. 2023-03-11T16:31:20.19 0.6 undecidable manual S 24 26.6511 107 0.28 46
IV.SSFR.HHZ. 2023-03-11T16:31:19.15 3.0 undecidable manual P 35.742 1.62 0
IV.ATPI.EHZ. 2023-03-11T16:31:18.25 0.6 undecidable manual S 357 21.6672 111 -0.02 49
IV.MGAB.HNZ. 2023-03-11T16:31:18.89 0.1 undecidable manual P 213 45.3213 50 -0.12 92
IV.PIEI.HNZ. 2023-03-11T16:31:17.01 0.3 undecidable manual P 17 32.4453 104 0.06 71
IV.ATCC.EHZ. 2023-03-11T16:31:17.97 0.6 undecidable manual S 113 19.7691 113 0.3 46
IV.ATFO.HHZ. 2023-03-11T16:31:17.31 0.6 undecidable manual S 46 17.5713 115 0.34 46
IV.TB03.DHZ. 2023-03-11T16:31:16.29 0.6 undecidable manual S 359 16.1727 117 -0.23 47
IV.TSM2.DHZ. 2023-03-11T16:31:16.32 0.6 undecidable manual S 21 16.6722 116 -0.37 46
IV.ASSB.HHZ. 2023-03-11T16:31:16.60 1.0 undecidable manual P 140 30.747 105 -0.02 24
IV.FOSV.EHZ. 2023-03-11T16:31:15.66 0.6 undecidable manual P 81 28.2495 106 -0.47 44
IV.TB02.DHZ. 2023-03-11T16:31:15.21 0.6 undecidable manual S 358 12.6762 123 -0.28 47
IV.ATBU.EHZ. 2023-03-11T16:31:15.88 0.1 undecidable manual P 24 26.6511 107 0.06 96
IV.ATVO.HHZ. 2023-03-11T16:31:15.81 0.6 undecidable manual S 357 13.9749 120 -0.06 49
IV.ATMI.HHZ. 2023-03-11T16:31:15.98 0.6 undecidable manual S 306 14.7741 119 -0.11 48
IV.TB01.DHZ. 2023-03-11T16:31:15.88 0.6 undecidable manual S 7 14.0748 120 0 50
IV.ATSC.EHZ. 2023-03-11T16:31:15.96 0.1 undecidable manual P 49 28.749 106 -0.26 92
IV.MURB.HHZ. 2023-03-11T16:31:14.51 0.6 undecidable manual S 85 8.88 133 0.09 49
IV.ATFO.HHZ. 2023-03-11T16:31:14.29 0.1 undecidable manual P 46 17.5713 115 0.16 95
IV.ATPI.EHZ. 2023-03-11T16:31:14.87 0.3 undecidable manual P 357 21.6672 111 0 73
IV.ATCC.EHZ. 2023-03-11T16:31:14.62 0.6 undecidable manual P 113 19.7691 113 0.09 48
IV.ATLO.HNZ. 2023-03-11T16:31:13.52 0.6 undecidable manual S 354 6.5934 141 -0.37 47
IV.ATMI.HHZ. 2023-03-11T16:31:13.96 0.1 negative manual P 306 14.7741 119 0.34 92
IV.TB01.DHZ. 2023-03-11T16:31:13.54 0.1 undecidable manual P 7 14.0748 120 0.04 98
IV.TB02.DHZ. 2023-03-11T16:31:13.34 0.1 undecidable manual P 358 12.6762 123 0.07 98
IV.TB03.DHZ. 2023-03-11T16:31:13.87 0.1 undecidable manual P 359 16.1727 117 0.01 99
IV.ATVO.HHZ. 2023-03-11T16:31:13.49 0.1 undecidable manual P 357 13.9749 120 0 99
IV.TSM2.DHZ. 2023-03-11T16:31:13.93 0.1 undecidable manual P 21 16.6722 116 -0.03 98
IV.ATVA.EHZ. 2023-03-11T16:31:13.13 0.3 undecidable manual P 283 10.7781 127 0.17 72
IV.ATLO.HNZ. 2023-03-11T16:31:12.32 0.1 undecidable manual P 354 6.5934 141 -0.03 100
IV.MURB.HHZ. 2023-03-11T16:31:12.78 0.1 positive manual P 85 8.88 133 0.12 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MURB.HHN. ML:1.8 0.0009210756 0.2304 AML other m 2023-03-11T16:31:14.87
IV.MURB.HHE. ML:1.5 0.00049132605 0.2048 AML other m 2023-03-11T16:31:16.00
IV.ATFO.HHE. ML:1.0 0.00007980000000000002 0.28 AML other m 2023-03-11T16:31:17.86
IV.ATFO.HHN. ML:0.9 0.000064321465 0.32 AML other m 2023-03-11T16:31:17.53
IV.ATVO.HHN. ML:0.5 0.0000354544345 0.1408 AML other m 2023-03-11T16:31:16.17
IV.ATVO.HHE. ML:0.6 0.000045165444999999996 0.1152 AML other m 2023-03-11T16:31:16.28
IV.ATCC.EHN. ML:0.8 0.000047161015 0.1792 AML other m 2023-03-11T16:31:18.58
IV.ATCC.EHE. ML:1.0 0.000077077815 0.0896 AML other m 2023-03-11T16:31:18.78
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