Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.7 on date 30-04-2023 and time 11:32:07 (Italy) in region 4 km NW Visso (MC)

A magnitude ML 0.7 earthquake occured in region: 4 km NW Visso (MC), on

  • 30-04-2023 09:32:07 (UTC)
  • 30-04-2023 11:32:07 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.9560, 13.0540 at 4 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.

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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
Visso MC 4 1107 1107
Monte Cavallo MC 6 145 1252
Ussita MC 7 444 1696
Preci PG 9 724 2420
Fiordimonte MC 10 202 2622
Pieve Torina MC 10 1458 4080
Castelsantangelo sul Nera MC 11 281 4361
Pievebovigliana MC 12 866 5227
Fiastra MC 12 559 5786
Sellano PG 13 1079 6865
Acquacanina MC 13 121 6986
Muccia MC 14 915 7901
Bolognola MC 15 142 8043
Serravalle di Chienti MC 15 1070 9113
Norcia PG 18 4957 14070
Cerreto di Spoleto PG 19 1075 15145

Municipalities with at least 50000 inhabitants

An earthquake occurred to
28 Km E of Foligno (57155 inhabitants)
55 Km NE of Terni (111501 inhabitants)
57 Km E of Perugia (166134 inhabitants)
63 Km NW of Teramo (54892 inhabitants)
73 Km NW of L'Aquila (69753 inhabitants)
83 Km SW of Ancona (100861 inhabitants)
98 Km NE of Viterbo (67173 inhabitants)
99 Km S of Fano (60888 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 0.7 2023-04-30
09:32:07		 42.956 13.0535 4 2023-04-30
09:40:04		 Sala Sismica INGV-Roma 116898941
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-04-30 09:32:07 ± 0.13
Latitude 42.9560 ± 0.0054
Longitude 13.0535 ± 0.0049
Depth (km) 4 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 116898941

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 604
Semi-minor axis of confidence ellipse (meter) 223
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 18
Circular confidence region, given by single value of horizontal uncertainty (meter) 600.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 185
Number of associated phases, regardless of their use for origin computation 14
Number of defining phases 14
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) 0.00630
Epicentral distance of station farthest from the epicenter (degree) 0.19425
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 7
Magnitude information

ML:0.7

Field Value
Value 0.7
Uncertainty 0.3
Num. used stations 6
Type of magnitude ML
Reference to an origin 116898941
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-04-30 09:40:04
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
7F.SIB2.EHE. 2023-04-30T09:32:15.48 0.6 undecidable manual S 109 21.5673 99 0.01 49
IV.CSP1.EHZ. 2023-04-30T09:32:14.69 0.6 undecidable manual S 39 19.4694 100 -0.05 49
IV.MML1.EHZ. 2023-04-30T09:32:14.51 1.0 undecidable manual S 339 18.6702 101 0.03 25
IV.CESI.HHZ. 2023-04-30T09:32:12.85 0.6 undecidable manual S 294 13.2756 105 0.21 48
IV.CSP1.EHZ. 2023-04-30T09:32:12.32 0.1 undecidable manual P 39 19.4694 100 0.48 89
7F.SIB2.EHE. 2023-04-30T09:32:12.05 0.1 undecidable manual P 109 21.5673 99 -0.21 94
IV.FDMO.HHZ. 2023-04-30T09:32:11.19 0.6 undecidable manual S 17 9.3795 110 -0.16 49
IV.MML1.EHZ. 2023-04-30T09:32:11.43 0.1 undecidable manual P 339 18.6702 101 -0.27 93
IT.MTCL.HGE. 2023-04-30T09:32:10.14 0.6 undecidable manual S 314 6.0939 120 -0.18 49
IV.CESI.HHZ. 2023-04-30T09:32:10.71 0.1 positive manual P 294 13.2756 105 0.08 98
IV.FEMA.HNE. 2023-04-30T09:32:09.14 0.6 undecidable manual S 336 0.6993 168 0.02 51
IV.FDMO.HHZ. 2023-04-30T09:32:09.78 1.0 undecidable manual P 17 9.3795 110 -0.1 25
IT.MTCL.HGE. 2023-04-30T09:32:09.23 0.1 undecidable manual P 314 6.0939 120 -0.06 100
IV.FEMA.HNE. 2023-04-30T09:32:08.68 0.1 undecidable manual P 336 0.6993 168 0.08 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FDMO.HHE. ML:0.8 0.00011665 0.78 AML other m 2023-04-30T09:32:11.34
IV.FDMO.HHN. ML:1.0 0.0001725 0.24 AML other m 2023-04-30T09:32:11.49
IV.CESI.HHN. ML:1.1 0.00017 0.2 AML other m 2023-04-30T09:32:13.35
IV.CESI.HHE. ML:0.8 0.0000811 0.78 AML other m 2023-04-30T09:32:13.12
IV.MML1.EHE. ML:0.2 0.0000160203 0.1408 AML other m 2023-04-30T09:32:15.02
IV.MML1.EHN. ML:0.4 0.000019738140000000003 0.1792 AML other m 2023-04-30T09:32:14.62
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