Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.3 on date 04-12-2021 and time 18:33:59 (Italy) in region 4 km E Monte Cavallo (MC)

A magnitude ML 0.3 earthquake occured in region: 4 km E Monte Cavallo (MC), on

  • 04-12-2021 17:33:59 (UTC)
  • 04-12-2021 18:33:59 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.0060, 13.0440 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 4 145 145
Pieve Torina MC 4 1458 1603
Fiordimonte MC 5 202 1805
Pievebovigliana MC 7 866 2671
Muccia MC 9 915 3586
Visso MC 9 1107 4693
Fiastra MC 10 559 5252
Ussita MC 10 444 5696
Serravalle di Chienti MC 11 1070 6766
Acquacanina MC 11 121 6887
Preci PG 14 724 7611
Camerino MC 15 6974 14585
Bolognola MC 15 142 14727
Castelsantangelo sul Nera MC 15 281 15008
Sellano PG 16 1079 16087
Sefro MC 18 422 16509
Pioraco MC 20 1134 17643

Municipalities with at least 50000 inhabitants

An earthquake occurred to
28 Km E of Foligno (57155 inhabitants)
54 Km E of Perugia (166134 inhabitants)
59 Km NE of Terni (111501 inhabitants)
66 Km NW of Teramo (54892 inhabitants)
78 Km SW of Ancona (100861 inhabitants)
78 Km NW of L'Aquila (69753 inhabitants)
93 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 0.3 2021-12-04
17:33:59		 43.0057 13.0442 10 2021-12-04
17:42:46		 Sala Sismica INGV-Roma 98138571
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-12-04 17:33:59 ± 0.23
Latitude 43.0057 ± 0.0054
Longitude 13.0442 ± 0.0074
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 98138571

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 663
Semi-minor axis of confidence ellipse (meter) 392
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 237
Circular confidence region, given by single value of horizontal uncertainty (meter) 660.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 107
Number of associated phases, regardless of their use for origin computation 13
Number of defining phases 10
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.18
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.17986
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 5
Magnitude information

ML:0.3

Field Value
Value 0.3
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 98138571
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-12-04 17:42:46
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.COR1.EHZ. 2021-12-04T17:34:09.04 3.0 undecidable manual P -2.97 0
IV.MMUR.HNZ. 2021-12-04T17:34:08.51 3.0 undecidable manual P 0.4 0
IV.PP3.EHZ. 2021-12-04T17:34:08.02 3.0 negative manual P -0.16 0
IV.MC2.EHZ. 2021-12-04T17:34:06.11 0.6 undecidable manual S 132 15.7731 123 0.3 47
IV.NRCA.HHZ. 2021-12-04T17:34:06.75 0.6 undecidable manual S 163 19.9689 117 -0.32 47
IV.CESI.HHZ. 2021-12-04T17:34:04.65 0.6 undecidable manual S 270 11.2776 132 0.05 50
IV.MML1.HNZ. 2021-12-04T17:34:04.98 0.6 undecidable manual S 334 13.2756 128 -0.15 49
IV.FDMO.HHZ. 2021-12-04T17:34:03.11 0.6 undecidable manual S 46 4.8951 155 -0.13 50
IV.NRCA.HHZ. 2021-12-04T17:34:03.65 0.1 undecidable manual P 163 19.9689 117 -0.14 97
IV.MC2.EHZ. 2021-12-04T17:34:03.32 1.0 negative manual P 132 15.7731 123 0.26 24
IV.MML1.HNZ. 2021-12-04T17:34:02.56 0.1 undecidable manual P 334 13.2756 128 -0.1 99
IV.CESI.HHZ. 2021-12-04T17:34:02.54 0.1 undecidable manual P 270 11.2776 132 0.18 97
IV.FDMO.HHZ. 2021-12-04T17:34:01.67 0.1 undecidable manual P 46 4.8951 155 0.1 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FDMO.HHE. ML:0.2 0.000024461385 0.2176 AML other m 2021-12-04T17:34:03.70
IV.FDMO.HHN. ML:0.4 0.00004261981 0.1536 AML other m 2021-12-04T17:34:03.24
IV.CESI.HHE. ML:0.1 0.000015908409 0.0768 AML other m 2021-12-04T17:34:04.97
IV.CESI.HHN. ML:0.2 0.000019243904999999997 0.1664 AML other m 2021-12-04T17:34:05.05
IV.NRCA.HHE. ML:0.5 0.000024106475 0.1152 AML other m 2021-12-04T17:34:07.53
IV.NRCA.HHN. ML:0.4 0.000020350085 0.1536 AML other m 2021-12-04T17:34:07.51
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