Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.8 on date 09-04-2023 and time 00:20:17 (UTC) in region 4 km NE Sellano (PG)

A magnitude ML 0.8 earthquake occured in region: 4 km NE Sellano (PG), on

  • 09-04-2023 00:20:17 (UTC)
  • 09-04-2023 02:20:17 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.9220, 12.9420 at 10 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.

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
Sellano PG 4 1079 1079
Preci PG 9 724 1803
Monte Cavallo MC 9 145 1948
Cerreto di Spoleto PG 12 1075 3023
Visso MC 12 1107 4130
Pieve Torina MC 16 1458 5588
Ussita MC 16 444 6032
Trevi PG 17 8469 14501
Serravalle di Chienti MC 17 1070 15571
Castelsantangelo sul Nera MC 18 281 15852
Campello sul Clitunno PG 18 2442 18294
Fiordimonte MC 18 202 18496
Vallo di Nera PG 18 364 18860
Norcia PG 19 4957 23817
Pievebovigliana MC 20 866 24683
Muccia MC 20 915 25598
Foligno PG 20 57155 82753

Municipalities with at least 50000 inhabitants

An earthquake occurred to
20 Km E of Foligno (57155 inhabitants)
47 Km NE of Terni (111501 inhabitants)
49 Km E of Perugia (166134 inhabitants)
69 Km W of Teramo (54892 inhabitants)
74 Km NW of L'Aquila (69753 inhabitants)
88 Km NE of Viterbo (67173 inhabitants)
90 Km SW of Ancona (100861 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 0.8 2023-04-09
00:20:17		 42.9223 12.9418 10 2023-04-09
00:26:34		 Sala Sismica INGV-Roma 116189831
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-04-09 00:20:17 ± 0.09
Latitude 42.9223 ± 0.0045
Longitude 12.9418 ± 0.0061
Depth (km) 10 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 116189831

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 536
Semi-minor axis of confidence ellipse (meter) 369
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 48
Circular confidence region, given by single value of horizontal uncertainty (meter) 540.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 175
Number of associated phases, regardless of their use for origin computation 18
Number of defining phases 18
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.2
Epicentral distance of station closest to the epicenter (degree) 0.08274
Epicentral distance of station farthest from the epicenter (degree) 0.33275
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 9
Magnitude information

ML:0.8

Field Value
Value 0.8
Uncertainty 0.2
Num. used stations 2
Type of magnitude ML
Reference to an origin 116189831
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-04-09 00:26:34
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.SNTG.HHZ. 2023-04-09T00:20:30.22 0.3 undecidable manual S 360 36.9297 50 0.36 68
IV.CSP1.EHZ. 2023-04-09T00:20:27.51 0.1 undecidable manual S 48 28.4493 50 -0.09 97
IV.ASSB.HHZ. 2023-04-09T00:20:26.70 0.1 undecidable manual S 300 26.5512 50 -0.4 91
IV.MML1.EHZ. 2023-04-09T00:20:25.44 0.1 undecidable manual S 6 21.3675 115 -0.12 97
IV.NRCA.HHZ. 2023-04-09T00:20:24.08 0.1 undecidable manual S 125 17.1717 121 -0.18 97
IV.FDMO.HHZ. 2023-04-09T00:20:24.15 0.1 undecidable manual S 43 17.2716 120 -0.17 97
IV.SNTG.HHZ. 2023-04-09T00:20:24.51 0.1 undecidable manual P 360 36.9297 50 -0.06 96
IV.CSP1.EHZ. 2023-04-09T00:20:23.24 0.3 undecidable manual P 48 28.4493 50 -0.03 73
IV.ASSB.HHZ. 2023-04-09T00:20:23.40 0.3 undecidable manual P 300 26.5512 50 0.42 68
IV.CESI.HHZ. 2023-04-09T00:20:22.13 0.1 undecidable manual S 342 9.6792 136 -0.09 100
IV.MML1.EHZ. 2023-04-09T00:20:22.14 0.1 undecidable manual P 6 21.3675 115 0.05 99
IV.FEMA.HNN. 2023-04-09T00:20:22.45 0.1 undecidable manual S 63 9.7791 136 0.19 98
IV.NRCA.HHZ. 2023-04-09T00:20:21.32 0.1 undecidable manual P 125 17.1717 121 -0.02 100
IT.MTCL.HGN. 2023-04-09T00:20:21.94 0.1 undecidable manual S 30 9.1797 138 -0.17 98
IV.FDMO.HHZ. 2023-04-09T00:20:21.43 0.1 undecidable manual P 43 17.2716 120 0.05 99
IT.MTCL.HGN. 2023-04-09T00:20:20.28 0.1 undecidable manual P 30 9.1797 138 0.18 98
IV.CESI.HHZ. 2023-04-09T00:20:20.31 0.1 undecidable manual P 342 9.6792 136 0.15 99
IV.FEMA.HNN. 2023-04-09T00:20:20.37 0.3 undecidable manual P 63 9.7791 136 0.19 73
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CESI.HHN. ML:0.9 0.00010435 0.48 AML other m 2023-04-09T00:20:22.48
IV.CESI.HHE. ML:0.7 0.00006085 1.24 AML other m 2023-04-09T00:20:22.31
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