Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.9 on date 02-04-2023 and time 15:35:43 (UTC) in region 5 km E Umbertide (PG)

A magnitude ML 0.9 earthquake occured in region: 5 km E Umbertide (PG), on

  • 02-04-2023 15:35:43 (UTC)
  • 02-04-2023 17:35:43 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.2860, 12.3850 at 7 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 5 16681 16681
Montone PG 10 1680 18361
Gubbio PG 18 32216 50577
Pietralunga PG 18 2111 52688
Corciano PG 19 21332 74020
Perugia PG 20 166134 240154
Lisciano Niccone PG 20 613 240767

Municipalities with at least 50000 inhabitants

An earthquake occurred to
20 Km N of Perugia (166134 inhabitants)
45 Km NW of Foligno (57155 inhabitants)
45 Km E of Arezzo (99543 inhabitants)
81 Km SW of Fano (60888 inhabitants)
82 Km SW of Pesaro (94582 inhabitants)
83 Km N of Terni (111501 inhabitants)
85 Km E of Siena (53903 inhabitants)
88 Km S of Rimini (147750 inhabitants)
95 Km S of Cesena (96758 inhabitants)
99 Km W of Ancona (100861 inhabitants)
99 Km N 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 0.9 2023-04-02
15:35:43		 43.2858 12.3848 7 2024-03-01
17:18:03		 Bollettino Sismico Italiano INGV 116454501
Reviewed
Rev100 		ML 0.9 2023-04-02
15:35:43		 43.2865 12.3812 7 2023-04-02
16:18:46		 Sala Sismica INGV-Roma 115976051
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-04-02 15:35:43 ± 0.06
Latitude 43.2858 ± 0.0027
Longitude 12.3848 ± 0.0037
Depth (km) 7 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 116454501

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 289
Semi-minor axis of confidence ellipse (meter) 180
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 111
Circular confidence region, given by single value of horizontal uncertainty (meter) 290.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 90
Number of associated phases, regardless of their use for origin computation 33
Number of defining phases 33
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.19
Epicentral distance of station closest to the epicenter (degree) 0.03327
Epicentral distance of station farthest from the epicenter (degree) 0.42268
Number of stations at which the event was observed 18
Number of stations from which data was used for origin computation 18
Magnitudes information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.5
Num. used stations 4
Type of magnitude ML
Reference to an origin 116454501
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2023-04-17 11:20:35

ML:0.9

Field Value
Value 0.9
Uncertainty 0.5
Num. used stations 4
Type of magnitude ML
Reference to an origin 115976051
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-04-02 16:18:46
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MGAB.HNZ. 2023-04-02T15:35:59.34 0.3 undecidable manual S 208 46.9197 50 -0.2 67
IV.ATSC.EHE. 2023-04-02T15:35:53.57 0.3 undecidable manual S 58 28.749 104 -0.33 68
IV.ATPC.HHZ. 2023-04-02T15:35:52.05 0.3 undecidable manual S 15 22.3554 107 0.28 69
IV.ATCC.EHZ. 2023-04-02T15:35:52.30 0.3 undecidable manual S 118 23.4543 106 0.17 71
IV.ATBU.EHN. 2023-04-02T15:35:52.76 0.3 undecidable manual S 32 24.8529 106 0.17 71
IV.MGAB.HNZ. 2023-04-02T15:35:52.62 0.1 undecidable manual P 208 46.9197 50 -0.2 90
IV.CAFI.HHZ. 2023-04-02T15:35:50.79 0.1 undecidable manual P 278 34.1436 102 0.18 92
IV.ATPI.HNZ. 2023-04-02T15:35:50.47 0.3 undecidable manual S 4 18.3705 111 0.03 73
IV.TSM2.DHZ.01 2023-04-02T15:35:49.36 0.3 undecidable manual S 35 14.874 115 0.02 74
IV.ATSC.EHE. 2023-04-02T15:35:49.28 0.3 undecidable manual P 58 28.749 104 -0.28 68
IV.ATBU.EHN. 2023-04-02T15:35:48.83 0.1 undecidable manual P 32 24.8529 106 0.02 97
IV.TB01.DHZ.01 2023-04-02T15:35:48.19 0.1 undecidable manual S 21 11.3775 121 -0.07 98
IV.BADI.EHN. 2023-04-02T15:35:48.88 0.1 undecidable manual P 336 27.2505 104 -0.4 89
IV.TSM3.DHZ.07 2023-04-02T15:35:48.30 0.3 undecidable manual S 348 10.9779 122 0.14 73
IV.ATPC.HHZ. 2023-04-02T15:35:48.39 0.1 undecidable manual P 15 22.3554 107 0.06 97
IV.MURB.HHZ. 2023-04-02T15:35:48.52 0.3 undecidable manual S 103 11.5773 121 0.2 72
IV.ATCC.EHZ. 2023-04-02T15:35:48.62 0.1 undecidable manual P 118 23.4543 106 0.08 96
IV.TB03.DHZ.01 2023-04-02T15:35:48.99 0.3 undecidable manual S 9 12.9759 118 0.25 71
IV.ATVA.EHZ. 2023-04-02T15:35:47.32 0.1 undecidable manual S 264 8.0808 131 -0.01 100
IV.ATPI.HNZ. 2023-04-02T15:35:47.60 0.1 undecidable manual P 4 18.3705 111 0.04 98
IV.TB02.DHZ.01 2023-04-02T15:35:47.34 0.6 undecidable manual S 12 9.5793 126 -0.4 46
IV.ATFO.HNZ. 2023-04-02T15:35:47.29 0.1 undecidable manual P 59 17.5713 112 -0.12 96
IV.ATVO.HHZ. 2023-04-02T15:35:47.77 0.3 undecidable manual S 9 10.7781 123 -0.33 70
IV.ATVO.HHZ. 2023-04-02T15:35:46.27 0.1 undecidable manual P 9 10.7781 123 0.06 99
IV.TB03.DHZ.01 2023-04-02T15:35:46.79 0.1 undecidable manual P 9 12.9759 118 0.2 95
IV.TB01.DHZ.01 2023-04-02T15:35:46.37 0.1 undecidable manual P 21 11.3775 121 0.06 98
IV.TSM2.DHZ.01 2023-04-02T15:35:46.99 0.1 undecidable manual P 35 14.874 115 0.06 98
IV.TSM3.DHZ.07 2023-04-02T15:35:46.44 0.1 undecidable manual P 348 10.9779 122 0.19 96
IV.TB02.DHZ.01 2023-04-02T15:35:46.09 0.1 undecidable manual P 12 9.5793 126 0.08 98
IV.MURB.HHZ. 2023-04-02T15:35:46.46 0.1 undecidable manual P 103 11.5773 121 0.12 97
IV.ATLO.EHZ. 2023-04-02T15:35:45.91 0.1 undecidable manual S 29 3.6963 152 -0.46 92
IV.ATLO.EHZ. 2023-04-02T15:35:45.14 0.1 positive manual P 29 3.6963 152 -0.08 99
IV.ATVA.EHZ. 2023-04-02T15:35:45.92 0.1 undecidable manual P 264 8.0808 131 0.15 97
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ATVO.HHE. ML:0.5 0.000047149999999999994 0.56 AML other m 2023-04-02T15:35:48.57
IV.MURB.HHN. ML:1.5 0.0003895 0.28 AML other m 2023-04-02T15:35:48.84
IV.MURB.HHE. ML:1.2 0.00021499999999999997 0.16 AML other m 2023-04-02T15:35:49.63
IV.ATVO.HHN. ML:0.4 0.000040499999999999995 0.52 AML other m 2023-04-02T15:35:50.06
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