Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.4 on date 09-09-2023 and time 20:56:33 (Italy) in region 6 km W Monte Cavallo (MC)

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

  • 09-09-2023 18:56:33 (UTC)
  • 09-09-2023 20:56:33 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.0060, 12.9260 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.

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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 14 202 4869
Pievebovigliana MC 15 866 5735
Valtopina PG 15 1398 7133
Visso MC 16 1107 8240
Sefro MC 16 422 8662
Nocera Umbra PG 16 5839 14501
Preci PG 17 724 15225
Ussita MC 19 444 15669
Camerino MC 19 6974 22643
Foligno PG 19 57155 79798
Fiastra MC 19 559 80357
Pioraco MC 20 1134 81491

Municipalities with at least 50000 inhabitants

An earthquake occurred to
19 Km E of Foligno (57155 inhabitants)
45 Km E of Perugia (166134 inhabitants)
54 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)
99 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 2023-09-09
18:56:33		 43.0058 12.9258 10 2023-09-09
19:49:44		 Sala Sismica INGV-Roma 120922931
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-09-09 18:56:33 ± 0.06
Latitude 43.0058 ± 0.0027
Longitude 12.9258 ± 0.0049
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 120922931

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 443
Semi-minor axis of confidence ellipse (meter) 294
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 260
Circular confidence region, given by single value of horizontal uncertainty (meter) 440.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 125
Number of associated phases, regardless of their use for origin computation 17
Number of defining phases 13
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.12
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.61963
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 7
Magnitude information

ML:0.4

Field Value
Value 0.4
Uncertainty 0.3
Num. used stations 6
Type of magnitude ML
Reference to an origin 120922931
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-09-09 19:49:44
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CSNT.HHZ. 2023-09-09T18:57:16.02 3.0 undecidable manual S 0.04 0
IV.VMGN.HHZ. 2023-09-09T18:57:00.76 3.0 negative manual P 1.74 0
IV.CIMA.HNZ. 2023-09-09T18:56:48.37 3.0 undecidable manual P 68.7756 2.58 0
IV.MDAR.HNZ. 2023-09-09T18:56:43.01 3.0 undecidable manual S -2.82 0
IV.SNTG.HHZ. 2023-09-09T18:56:43.62 0.1 undecidable manual S 2 27.6501 50 -0.06 97
IV.NRCA.HHZ. 2023-09-09T18:56:42.79 0.1 undecidable manual S 141 24.4533 50 -0.04 98
IV.CSP1.EHZ. 2023-09-09T18:56:42.80 0.3 undecidable manual S 67 24.5532 50 -0.05 74
IV.MML1.EHZ. 2023-09-09T18:56:39.28 0.6 undecidable manual S 17 12.4764 130 -0.02 50
IV.SNTG.HHZ. 2023-09-09T18:56:39.35 1.0 negative manual P 2 27.6501 50 -0.09 24
IV.FDMO.HHZ. 2023-09-09T18:56:39.48 0.3 undecidable manual S 75 13.5753 127 -0.11 74
IV.CSP1.EHZ. 2023-09-09T18:56:39.06 1.0 negative manual P 67 24.5532 50 0.1 24
IV.NRCA.HHZ. 2023-09-09T18:56:38.97 0.1 undecidable manual P 141 24.4533 50 0.01 99
IV.MML1.EHZ. 2023-09-09T18:56:37.07 0.3 positive manual P 17 12.4764 130 0.15 74
IV.MTCL.HGZ. 2023-09-09T18:56:37.81 0.1 undecidable manual S 100
IV.FDMO.HHZ. 2023-09-09T18:56:37.22 0.1 undecidable manual P 75 13.5753 127 0.13 98
IV.CESI.HHE. 2023-09-09T18:56:37.05 0.3 undecidable manual S 266 1.6983 171 -0.27 73
IV.CESI.HHE. 2023-09-09T18:56:35.92 0.1 undecidable manual P 266 1.6983 171 0.15 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MML1.EHE. ML:0.7 0.0000541 0.14 AML other m 2023-09-09T18:56:39.43
IV.MML1.EHN. ML:0.3 0.0000206 0.34 AML other m 2023-09-09T18:56:39.66
IV.FDMO.HHN. ML:0.0 0.000011085000000000001 0.44 AML other m 2023-09-09T18:56:40.20
IV.FDMO.HHE. ML:0.2 0.000012835 0.42 AML other m 2023-09-09T18:56:40.82
IV.NRCA.HHE. ML:0.7 0.0000291 0.12 AML other m 2023-09-09T18:56:43.14
IV.NRCA.HHN. ML:0.4 0.000015550000000000002 0.72 AML other m 2023-09-09T18:56:44.60
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