Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.4 on date 17-04-2023 and time 20:31:39 (UTC) in region 6 km W Monte Cavallo (MC)

A magnitude ML 0.4 earthquake occured in region: 6 km W Monte Cavallo (MC), on

  • 17-04-2023 20:31:39 (UTC)
  • 17-04-2023 22:31:39 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.0040, 12.9350 at 12 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
Monte Cavallo MC 6 145 145
Serravalle di Chienti MC 8 1070 1215
Pieve Torina MC 11 1458 2673
Muccia MC 13 915 3588
Sellano PG 13 1079 4667
Fiordimonte MC 13 202 4869
Pievebovigliana MC 14 866 5735
Visso MC 15 1107 6842
Valtopina PG 16 1398 8240
Sefro MC 16 422 8662
Preci PG 16 724 9386
Nocera Umbra PG 17 5839 15225
Ussita MC 18 444 15669
Camerino MC 18 6974 22643
Fiastra MC 18 559 23202
Foligno PG 20 57155 80357
Acquacanina MC 20 121 80478
Pioraco MC 20 1134 81612

Municipalities with at least 50000 inhabitants

An earthquake occurred to
20 Km E of Foligno (57155 inhabitants)
46 Km E of Perugia (166134 inhabitants)
55 Km NE of Terni (111501 inhabitants)
74 Km NW of Teramo (54892 inhabitants)
82 Km NW of L'Aquila (69753 inhabitants)
83 Km SW of Ancona (100861 inhabitants)
94 Km S of Fano (60888 inhabitants)
94 Km NE of Viterbo (67173 inhabitants)
100 Km SE of Arezzo (99543 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 0.4 2023-04-17
20:31:39		 43.0045 12.9347 12 2023-04-18
06:33:41		 Sala Sismica INGV-Roma 116479991
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-04-17 20:31:39 ± 0.04
Latitude 43.0045 ± 0.0018
Longitude 12.9347 ± 0.0037
Depth (km) 12 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 116479991

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 258
Semi-minor axis of confidence ellipse (meter) 46
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 239
Circular confidence region, given by single value of horizontal uncertainty (meter) 260.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 80
Number of associated phases, regardless of their use for origin computation 33
Number of defining phases 32
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.14
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.40919
Number of stations at which the event was observed 17
Number of stations from which data was used for origin computation 16
Magnitude information

ML:0.4

Field Value
Value 0.4
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 116479991
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-04-18 06:33:41
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.LNSS.HHZ. 2023-04-17T20:31:54.35 0.6 undecidable manual S 169 45.4212 92 0.05 47
IV.PCRO.HNZ. 2023-04-17T20:31:53.93 3.0 positive manual P -0.31 0
IV.EL6.EHE. 2023-04-17T20:31:52.56 0.3 undecidable manual S 20 38.5281 93 0.1 70
IV.MOMA.HNE. 2023-04-17T20:31:52.40 0.6 undecidable manual S 233 37.0296 93 0.32 45
IV.MMO1.EHZ. 2023-04-17T20:31:51.20 0.3 undecidable manual S 110 33.9438 94 -0.04 72
IV.GAVE.EHZ. 2023-04-17T20:31:51.42 0.3 undecidable manual S 185 34.8429 93 -0.06 71
7F.SIB2.EHE. 2023-04-17T20:31:50.79 0.3 undecidable manual S 113 32.5452 94 -0.08 71
7F.SIB3.EHZ. 2023-04-17T20:31:50.08 0.3 undecidable manual S 118 30.747 94 -0.34 68
IV.SNTG.HNE. 2023-04-17T20:31:49.51 0.3 undecidable manual S 1 27.75 95 -0.11 72
IV.LNSS.HHZ. 2023-04-17T20:31:48.27 0.1 undecidable manual P 169 45.4212 92 0.13 92
IV.NRCA.HHZ. 2023-04-17T20:31:48.33 0.3 undecidable manual S 142 23.9538 97 -0.26 69
IV.CSP1.EHZ. 2023-04-17T20:31:48.80 0.3 undecidable manual S 66 23.9538 97 0.2 70
IV.EL6.EHE. 2023-04-17T20:31:47.04 0.1 undecidable manual P 20 38.5281 93 -0.04 95
IV.ASSB.HHZ. 2023-04-17T20:31:47.97 0.6 undecidable manual S 281 22.755 98 -0.32 46
IV.MOMA.HNE. 2023-04-17T20:31:47.05 0.3 undecidable manual P 233 37.0296 93 0.19 69
IV.MMO1.EHZ. 2023-04-17T20:31:46.59 0.1 undecidable manual P 110 33.9438 94 0.22 92
IV.GAVE.EHZ. 2023-04-17T20:31:46.73 0.3 undecidable manual P 185 34.8429 93 0.21 69
7F.SIB2.EHE. 2023-04-17T20:31:46.29 0.3 undecidable manual P 113 32.5452 94 0.13 71
IV.MML1.EHZ. 2023-04-17T20:31:45.75 0.3 undecidable manual S 14 12.4764 119 0.1 74
IV.FDMO.HHZ. 2023-04-17T20:31:45.74 0.3 undecidable manual S 74 12.876 117 0 75
IV.SNTG.HNE. 2023-04-17T20:31:45.10 0.3 undecidable manual P 1 27.75 95 -0.34 68
IV.FEMA.HNE. 2023-04-17T20:31:45.24 0.3 undecidable manual S 117 10.4784 127 0.04 75
7F.SIB3.EHZ. 2023-04-17T20:31:45.92 0.1 undecidable manual P 118 30.747 94 0.03 96
IV.ASSB.HHZ. 2023-04-17T20:31:44.47 0.1 undecidable manual P 281 22.755 98 -0.2 94
IV.CSP1.EHZ. 2023-04-17T20:31:44.88 0.1 positive manual P 66 23.9538 97 0.04 97
IV.NRCA.HHZ. 2023-04-17T20:31:44.70 0.1 negative manual P 142 23.9538 97 -0.14 95
IT.MTCL.HGE. 2023-04-17T20:31:44.21 0.3 undecidable manual S 103 5.3946 150 -0.08 74
IV.MML1.EHZ. 2023-04-17T20:31:43.23 0.1 positive manual P 14 12.4764 119 0.08 98
IV.FDMO.HHZ. 2023-04-17T20:31:43.28 0.1 positive manual P 74 12.876 117 0.08 98
IV.CESI.HHZ. 2023-04-17T20:31:43.98 0.3 undecidable manual S 271 2.3976 166 -0.02 75
IT.MTCL.HGE. 2023-04-17T20:31:42.40 0.6 undecidable manual P 103 5.3946 150 0.04 51
IV.CESI.HHZ. 2023-04-17T20:31:42.32 0.1 negative manual P 271 2.3976 166 0.13 100
IV.FEMA.HNE. 2023-04-17T20:31:42.89 0.1 undecidable manual P 117 10.4784 127 0 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CESI.HHE. ML:0.3 0.000028608865 0.0512 AML other m 2023-04-17T20:31:44.61
IV.CESI.HHN. ML:0.0 0.000015683765500000003 43.5968 AML other m 2023-04-17T20:31:41.96
IV.MML1.EHE. ML:0.6 0.000034413715 0.0896 AML other m 2023-04-17T20:31:46.03
IV.MML1.EHN. ML:0.3 0.000018531190000000002 0.1536 AML other m 2023-04-17T20:31:45.95
IV.ASSB.HHE. ML:0.4 0.000015952424999999998 0.1664 AML other m 2023-04-17T20:31:48.22
IV.ASSB.HHN. ML:0.4 0.000014799345 0.8192 AML other m 2023-04-17T20:31:56.20
IV.NRCA.HHE. ML:0.6 0.000025383625 0.1152 AML other m 2023-04-17T20:31:48.66
IV.NRCA.HHN. ML:0.5 0.000018131080000000002 0.0896 AML other m 2023-04-17T20:31:49.10
IV.GAVE.EHE. ML:0.4 0.000009405809500000002 0.128 AML other m 2023-04-17T20:31:52.95
IV.GAVE.EHN. ML:0.4 0.00000963345189 0.256 AML other m 2023-04-17T20:31:53.22
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