Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.8 on date 01-04-2023 and time 22:46:25 (Italy) in region 5 km SE Umbertide (PG)

A magnitude ML 0.8 earthquake occured in region: 5 km SE Umbertide (PG), on

  • 01-04-2023 20:46:25 (UTC)
  • 01-04-2023 22:46:25 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.2790, 12.3750 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.

Hai sentito il terremoto? Clicca qui

Did you feel it? Fill in the questionnaire.

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
Corciano PG 18 21332 39693
Gubbio PG 19 32216 71909
Perugia PG 19 166134 238043
Lisciano Niccone PG 19 613 238656
Pietralunga PG 19 2111 240767

Municipalities with at least 50000 inhabitants

An earthquake occurred to
19 Km N of Perugia (166134 inhabitants)
45 Km NW of Foligno (57155 inhabitants)
45 Km E of Arezzo (99543 inhabitants)
82 Km SW of Fano (60888 inhabitants)
83 Km SW of Pesaro (94582 inhabitants)
83 Km N of Terni (111501 inhabitants)
84 Km E of Siena (53903 inhabitants)
88 Km S of Rimini (147750 inhabitants)
96 Km S of Cesena (96758 inhabitants)
98 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 0.8 2023-04-01
20:46:25		 43.2787 12.3747 10 2024-03-01
17:18:04		 Bollettino Sismico Italiano INGV 116611701
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-04-01 20:46:25 ± 0.07
Latitude 43.2787 ± 0.0036
Longitude 12.3747 ± 0.0062
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 116611701

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 480
Semi-minor axis of confidence ellipse (meter) 386
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 79
Circular confidence region, given by single value of horizontal uncertainty (meter) 480.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 69
Number of associated phases, regardless of their use for origin computation 36
Number of defining phases 30
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.23
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.41279
Number of stations at which the event was observed 23
Number of stations from which data was used for origin computation 17
Magnitude information

ML:0.8

Field Value
Value 0.8
Uncertainty 0.3
Num. used stations 6
Type of magnitude ML
Reference to an origin 116611701
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2023-04-22 13:22:21
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IX.SCL3.EHZ.02 2023-04-01T20:48:11.68 3.0 undecidable manual Sg 5.43 0
SL.LJU.BHZ. 2023-04-01T20:48:01.17 3.0 undecidable manual Sg 3.56 0
IV.MCRV.HHZ. 2023-04-01T20:47:55.47 3.0 undecidable manual Sn -5.05 0
IV.ECTS.HHZ. 2023-04-01T20:47:55.07 3.0 undecidable manual Pn 0.63 0
IV.SALB.HHZ. 2023-04-01T20:47:49.49 3.0 negative manual Pg 12.42 0
IV.VARE.HHZ. 2023-04-01T20:47:21.90 3.0 negative manual Pn -2.81 0
IV.MGAB.HHZ. 2023-04-01T20:46:41.27 0.3 undecidable manual S 208 45.8208 50 0.25 68
IV.ASSB.HHN. 2023-04-01T20:46:38.40 0.6 undecidable manual S 139 34.8429 50 0.31 45
IV.ATSC.EHZ. 2023-04-01T20:46:36.58 0.6 undecidable manual S 57 29.8479 50 -0.19 47
IV.MGAB.HHZ. 2023-04-01T20:46:35.32 0.6 undecidable manual P 208 45.8208 50 0.65 40
IV.ATCC.EHZ. 2023-04-01T20:46:35.06 0.6 undecidable manual S 116 23.8539 112 0.17 48
IV.ATPC.HHZ. 2023-04-01T20:46:34.95 0.6 undecidable manual S 16 23.3544 112 0.2 47
IV.ATPI.HNZ. 2023-04-01T20:46:33.75 0.3 undecidable manual S 7 19.2696 116 0.31 70
IV.TB03.DHZ.01 2023-04-01T20:46:32.39 0.6 undecidable manual S 12 13.875 124 0.54 44
IV.ASSB.HHN. 2023-04-01T20:46:32.83 0.6 undecidable manual P 139 34.8429 50 -0.15 47
IV.ATPC.HHZ. 2023-04-01T20:46:31.38 0.6 undecidable manual P 16 23.3544 112 0.33 46
IV.TB01.DHZ.01 2023-04-01T20:46:31.34 0.6 undecidable manual S 23 12.4764 128 -0.09 49
IV.ATVO.HHZ. 2023-04-01T20:46:31.39 0.3 undecidable manual S 13 11.7771 129 0.14 73
IV.ATSC.EHZ. 2023-04-01T20:46:31.70 0.1 undecidable manual P 57 29.8479 50 -0.51 88
IV.MURB.HHZ. 2023-04-01T20:46:31.81 0.6 undecidable manual S 98 12.2766 128 0.43 46
IV.TSM3.DHZ. 2023-04-01T20:46:31.21 0.6 undecidable manual S 352 11.6772 129 -0.02 50
IV.ATBU.HNZ. 2023-04-01T20:46:31.50 0.1 undecidable manual P 33 25.9518 110 -0.04 98
IV.ATMI.HHZ. 2023-04-01T20:46:30.86 0.3 undecidable manual S 306 10.5783 132 -0.08 74
IV.ATCC.EHZ. 2023-04-01T20:46:30.96 0.1 undecidable manual P 116 23.8539 112 -0.17 95
IV.ATPI.HNZ. 2023-04-01T20:46:30.23 0.1 undecidable manual P 7 19.2696 116 -0.06 98
IV.TB02.DHZ. 2023-04-01T20:46:30.96 0.3 undecidable manual S 15 10.5783 132 0.03 75
IV.TSM3.DHZ. 2023-04-01T20:46:29.13 0.1 undecidable manual P 352 11.6772 129 0.12 98
IV.TB03.DHZ.01 2023-04-01T20:46:29.88 0.6 undecidable manual P 12 13.875 124 0.51 45
IV.TB01.DHZ.01 2023-04-01T20:46:29.02 0.1 undecidable manual P 23 12.4764 128 -0.11 98
IV.TSM2.DHZ. 2023-04-01T20:46:29.58 0.1 undecidable manual P 35 16.0728 121 -0.15 97
IV.MURB.HHZ. 2023-04-01T20:46:29.13 0.1 undecidable manual P 98 12.2766 128 0.03 100
IV.TB02.DHZ. 2023-04-01T20:46:28.72 0.1 undecidable manual P 15 10.5783 132 -0.13 98
IV.ATMI.HHZ. 2023-04-01T20:46:28.90 0.6 positive manual P 306 10.5783 132 0.05 50
IV.ATVO.HHZ. 2023-04-01T20:46:28.96 0.1 undecidable manual P 13 11.7771 129 -0.07 99
IV.ATVA.EHZ. 2023-04-01T20:46:28.05 0.1 undecidable manual P 270 7.1928 143 -0.34 95
IV.ATLO.EHZ. 2023-04-01T20:46:27.71 0.1 undecidable manual P 33 4.7952 153 -0.43 93
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MURB.HHE. ML:1.2 0.000191 0.18 AML other m 2023-04-01T20:46:32.20
IV.MURB.HHN. ML:1.3 0.0002445 0.22 AML other m 2023-04-01T20:46:33.39
IV.ATMI.HHN. ML:0.8 0.00007324995 0.32 AML other m 2023-04-01T20:46:34.11
IV.ATMI.HHE. ML:0.8 0.00007809013 0.4992 AML other m 2023-04-01T20:46:32.61
IV.ATVO.HHN. ML:0.5 0.000036205849999999995 0.1152 AML other m 2023-04-01T20:46:31.74
IV.ATVO.HHE. ML:0.5 0.000032992850000000004 0.2176 AML other m 2023-04-01T20:46:32.67
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