Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.7 on date 20-12-2021 and time 08:44:49 (Italy) in region 3 km E Monte Cavallo (MC)

A magnitude ML 0.7 earthquake occured in region: 3 km E Monte Cavallo (MC), on

  • 20-12-2021 07:44:49 (UTC)
  • 20-12-2021 08:44:49 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.0040, 13.0350 at 14 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
Pieve Torina MC 5 1458 1603
Fiordimonte MC 6 202 1805
Pievebovigliana MC 8 866 2671
Muccia MC 9 915 3586
Visso MC 9 1107 4693
Serravalle di Chienti MC 10 1070 5763
Fiastra MC 11 559 6322
Ussita MC 11 444 6766
Acquacanina MC 12 121 6887
Preci PG 14 724 7611
Camerino MC 15 6974 14585
Sellano PG 15 1079 15664
Castelsantangelo sul Nera MC 16 281 15945
Bolognola MC 16 142 16087
Sefro MC 17 422 16509
Pioraco MC 20 1134 17643

Municipalities with at least 50000 inhabitants

An earthquake occurred to
27 Km E of Foligno (57155 inhabitants)
54 Km E of Perugia (166134 inhabitants)
59 Km NE of Terni (111501 inhabitants)
67 Km NW of Teramo (54892 inhabitants)
78 Km NW of L'Aquila (69753 inhabitants)
79 Km SW of Ancona (100861 inhabitants)
93 Km S of Fano (60888 inhabitants)
100 Km NE of Viterbo (67173 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 2021-12-20
07:44:49		 43.004 13.0353 14 2021-12-20
07:52:42		 Sala Sismica INGV-Roma 98747401
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-12-20 07:44:49 ± 0.04
Latitude 43.0040 ± 0.0018
Longitude 13.0353 ± 0.0025
Depth (km) 14 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 98747401

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 180
Semi-minor axis of confidence ellipse (meter) 171
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 52
Circular confidence region, given by single value of horizontal uncertainty (meter) 180.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 112
Number of associated phases, regardless of their use for origin computation 35
Number of defining phases 8
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.05
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 29
Number of stations from which data was used for origin computation 4
Magnitude information

ML:0.7

Field Value
Value 0.7
Uncertainty 0.2
Num. used stations 2
Type of magnitude ML
Reference to an origin 98747401
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-12-20 07:52:42
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.HAGA.HHZ. 2021-12-20T07:46:24.55 3.0 undecidable manual Pg 15.83 0
IV.SCIAC.HHZ. 2021-12-20T07:46:12.64 3.0 negative manual Pg 11.98 0
IV.CRND.HNZ. 2021-12-20T07:46:12.60 3.0 undecidable manual Sg 1.28 0
IV.SARZ.HHZ. 2021-12-20T07:46:09.11 3.0 undecidable manual Sn -7.32 0
IV.ZEN8.EHZ. 2021-12-20T07:46:06.55 3.0 undecidable manual Sn -5.79 0
IV.IST3.HHZ. 2021-12-20T07:45:51.89 3.0 positive manual Pg 1.88 0
CR.ZAG.BHZ. 2021-12-20T07:45:48.46 3.0 undecidable manual Pg 2.86 0
ST.OZOL.EHZ. 2021-12-20T07:45:42.47 3.0 undecidable manual Pn -1.01 0
IV.VOBA.EHZ. 2021-12-20T07:45:36.16 3.0 negative manual Pg 0.57 0
IV.IMOL.HNZ. 2021-12-20T07:45:35.87 3.0 undecidable manual Sg -1.03 0
GU.GRAM.HHZ. 2021-12-20T07:45:31.54 3.0 negative manual Pg 6.48 0
OT.OT05.EHZ. 2021-12-20T07:45:30.74 3.0 negative manual Pg 6.22 0
IX.NSC3.EHZ.02 2021-12-20T07:45:29.32 3.0 positive manual Pg 2.72 0
IV.BRSN.HNZ. 2021-12-20T07:45:27.36 3.0 undecidable manual Sn -6.28 0
IV.ZOVE.EHZ. 2021-12-20T07:45:26.39 3.0 undecidable manual Pn -3.41 0
IV.OSSC.HHZ. 2021-12-20T07:45:26.69 3.0 undecidable manual Sg 2.73 0
IV.BDI.HHZ. 2021-12-20T07:45:22.94 3.0 negative manual Pg 5.73 0
IV.MTMR.EHZ. 2021-12-20T07:45:22.06 3.0 undecidable manual Pn -2.96 0
IV.PTRJ.HHZ. 2021-12-20T07:45:18.01 3.0 undecidable manual Pg 0.73 0
IV.CELB.HHZ. 2021-12-20T07:45:14.37 3.0 positive manual Pg 1.18 0
IV.IMOL.HNZ. 2021-12-20T07:45:12.18 3.0 negative manual Pg -2.51 0
IV.NARO.HHZ. 2021-12-20T07:45:12.25 3.0 undecidable manual Sn -4.32 0
IV.VIVA.HHZ. 2021-12-20T07:45:04.34 3.0 negative manual Pg 1.69 0
IV.POFI.HHZ. 2021-12-20T07:45:01.74 3.0 undecidable manual Pn -6.09 0
IV.NARO.HHZ. 2021-12-20T07:45:00.00 3.0 undecidable manual Pg -3.27 0
IV.NRCA.HHZ. 2021-12-20T07:44:57.44 0.1 undecidable manual S 161 19.9689 109 -0.01 98
IV.CESI.HHZ. 2021-12-20T07:44:55.27 0.1 undecidable manual S 271 10.5783 133 -0.02 99
IV.MML1.EHZ. 2021-12-20T07:44:55.78 0.1 undecidable manual S 337 13.1757 125 -0.05 98
IV.NRCA.HHZ. 2021-12-20T07:44:54.05 0.6 positive manual P 161 19.9689 109 -0.05 48
IV.RMP.HHZ. 2021-12-20T07:44:54.42 3.0 undecidable manual Pn -7.27 0
IV.FDMO.HHZ. 2021-12-20T07:44:54.48 0.1 undecidable manual S 49 5.5944 153 0.01 100
IV.MML1.EHZ. 2021-12-20T07:44:53.29 1.0 undecidable manual P 337 13.1757 125 0.13 24
IV.FDMO.HHZ. 2021-12-20T07:44:52.42 1.0 undecidable manual P 49 5.5944 153 0.04 25
IV.CESI.HHZ. 2021-12-20T07:44:52.87 0.1 positive manual P 271 10.5783 133 0.02 99
IV.SACS.HHZ. 2021-12-20T07:44:50.70 3.0 undecidable manual P -5.87 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHE. ML:0.6 0.000027450000000000003 0.18 AML other m 2021-12-20T07:44:57.47
IV.NRCA.HHN. ML:0.8 0.00004485 0.12 AML other m 2021-12-20T07:44:57.51
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