Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.2 on date 27-03-2023 and time 20:40:47 (Italy) in region 3 km SW Monte Cavallo (MC)

A magnitude ML 1.2 earthquake occured in region: 3 km SW Monte Cavallo (MC), on

  • 27-03-2023 18:40:47 (UTC)
  • 27-03-2023 20:40:47 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.9710, 12.9770 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 3 145 145
Sellano PG 10 1079 1224
Pieve Torina MC 10 1458 2682
Visso MC 10 1107 3789
Preci PG 11 724 4513
Serravalle di Chienti MC 12 1070 5583
Fiordimonte MC 12 202 5785
Pievebovigliana MC 14 866 6651
Ussita MC 14 444 7095
Muccia MC 14 915 8010
Fiastra MC 16 559 8569
Castelsantangelo sul Nera MC 17 281 8850
Cerreto di Spoleto PG 18 1075 9925
Acquacanina MC 18 121 10046
Sefro MC 20 422 10468
Camerino MC 20 6974 17442

Municipalities with at least 50000 inhabitants

An earthquake occurred to
22 Km E of Foligno (57155 inhabitants)
50 Km E of Perugia (166134 inhabitants)
53 Km NE of Terni (111501 inhabitants)
69 Km NW of Teramo (54892 inhabitants)
77 Km NW of L'Aquila (69753 inhabitants)
84 Km SW of Ancona (100861 inhabitants)
94 Km NE of Viterbo (67173 inhabitants)
97 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 1.2 2023-03-27
18:40:47		 42.9712 12.9767 12 2023-03-27
18:53:54		 Sala Sismica INGV-Roma 115804491
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-03-27 18:40:47 ± 0.09
Latitude 42.9712 ± 0.0045
Longitude 12.9767 ± 0.0049
Depth (km) 12 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 115804491

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 431
Semi-minor axis of confidence ellipse (meter) 345
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 208
Circular confidence region, given by single value of horizontal uncertainty (meter) 430.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 143
Number of associated phases, regardless of their use for origin computation 19
Number of defining phases 18
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) 0.26620
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 9
Magnitude information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 115804491
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-03-27 18:53:54
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.FRON.EHZ. 2023-03-27T18:40:57.82 3.0 undecidable manual P -0.35 0
IV.ASSB.HHZ. 2023-03-27T18:40:56.37 0.6 undecidable manual S 287 26.9508 93 -0.3 45
IV.MMO1.EHZ. 2023-03-27T18:40:56.95 0.6 undecidable manual S 106 29.5482 92 -0.39 45
IV.CSP1.EHZ. 2023-03-27T18:40:55.72 0.6 undecidable manual S 54 22.8549 94 0.16 48
IV.NRCA.HHZ. 2023-03-27T18:40:54.31 0.6 undecidable manual S 144 18.9699 97 -0.2 48
IV.MML1.EHZ. 2023-03-27T18:40:53.57 0.6 undecidable manual S 359 15.7731 102 -0.12 47
IV.MMO1.EHZ. 2023-03-27T18:40:52.99 0.6 positive manual P 106 29.5482 92 0.02 48
IV.FDMO.HHZ. 2023-03-27T18:40:52.50 0.6 undecidable manual S 51 11.5773 118 -0.13 48
IV.CSP1.EHZ. 2023-03-27T18:40:52.07 0.6 positive manual P 54 22.8549 94 0.13 48
IV.ASSB.HHZ. 2023-03-27T18:40:52.51 0.3 positive manual P 287 26.9508 93 -0.07 72
IV.CESI.HHZ. 2023-03-27T18:40:51.67 0.6 undecidable manual S 303 6.993 140 0 50
IV.NRCA.HHZ. 2023-03-27T18:40:51.32 0.1 undecidable manual P 144 18.9699 97 -0.02 98
IV.FEMA.HNZ. 2023-03-27T18:40:51.54 0.6 undecidable manual S 100 5.994 144 0.02 50
IT.MTCL.HGZ. 2023-03-27T18:40:51.00 0.1 undecidable manual S 36 3.0969 161 -0.16 98
IV.MML1.EHZ. 2023-03-27T18:40:50.96 1.0 positive manual P 359 15.7731 102 0.1 24
IV.FDMO.HHZ. 2023-03-27T18:40:50.35 0.6 undecidable manual P 51 11.5773 118 0.1 49
IT.MTCL.HGZ. 2023-03-27T18:40:49.45 0.1 undecidable manual P 36 3.0969 161 0.05 100
IV.CESI.HHZ. 2023-03-27T18:40:49.90 0.1 undecidable manual P 303 6.993 140 0.2 96
IV.FEMA.HNZ. 2023-03-27T18:40:49.83 0.1 undecidable manual P 100 5.994 144 0.22 96
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CESI.HHE. ML:1.4 0.0002965 0.08 AML other m 2023-03-27T18:40:51.73
IV.CESI.HHN. ML:1.4 0.00035099999999999997 0.1 AML other m 2023-03-27T18:40:51.89
IV.FDMO.HHE. ML:1.1 0.00012675 0.2 AML other m 2023-03-27T18:40:52.71
IV.FDMO.HHN. ML:1.0 0.00010745000000000001 0.62 AML other m 2023-03-27T18:40:52.61
IV.NRCA.HHN. ML:1.0 0.0000797 0.12 AML other m 2023-03-27T18:40:54.44
IV.NRCA.HHE. ML:1.0 0.00007905000000000001 1.04 AML other m 2023-03-27T18:40:54.02
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