Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.0 on date 23-12-2021 and time 10:52:24 (Italy) in region 4 km NW Monte Cavallo (MC)

A magnitude ML 1.0 earthquake occured in region: 4 km NW Monte Cavallo (MC), on

  • 23-12-2021 09:52:24 (UTC)
  • 23-12-2021 10:52:24 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.0170, 12.9650 at 11 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
Serravalle di Chienti MC 6 1070 1215
Pieve Torina MC 8 1458 2673
Muccia MC 10 915 3588
Fiordimonte MC 10 202 3790
Pievebovigliana MC 11 866 4656
Visso MC 14 1107 5763
Sellano PG 14 1079 6842
Sefro MC 15 422 7264
Fiastra MC 16 559 7823
Camerino MC 16 6974 14797
Ussita MC 16 444 15241
Preci PG 16 724 15965
Acquacanina MC 17 121 16086
Nocera Umbra PG 18 5839 21925
Valtopina PG 18 1398 23323
Pioraco MC 18 1134 24457
Fiuminata MC 19 1402 25859

Municipalities with at least 50000 inhabitants

An earthquake occurred to
22 Km E of Foligno (57155 inhabitants)
48 Km E of Perugia (166134 inhabitants)
57 Km NE of Terni (111501 inhabitants)
72 Km NW of Teramo (54892 inhabitants)
81 Km SW of Ancona (100861 inhabitants)
82 Km NW of L'Aquila (69753 inhabitants)
92 Km S of Fano (60888 inhabitants)
97 Km NE of Viterbo (67173 inhabitants)
100 Km S of Pesaro (94582 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 1.0 2021-12-23
09:52:24		 43.0167 12.9652 11 2021-12-23
09:59:45		 Sala Sismica INGV-Roma 98845361
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-12-23 09:52:24 ± 0.07
Latitude 43.0167 ± 0.0045
Longitude 12.9652 ± 0.0049
Depth (km) 11 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 98845361

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 520
Semi-minor axis of confidence ellipse (meter) 390
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 170
Circular confidence region, given by single value of horizontal uncertainty (meter) 520.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 123
Number of associated phases, regardless of their use for origin computation 25
Number of defining phases 11
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.11
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.22573
Number of stations at which the event was observed 21
Number of stations from which data was used for origin computation 7
Magnitude information

ML:1.0

Field Value
Value 1.0
Uncertainty 0.3
Num. used stations 22
Type of magnitude ML
Reference to an origin 98845361
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-12-23 09:59:45
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.PZUN.HHZ. 2021-12-23T09:54:00.48 3.0 undecidable manual Sn 0.16 0
AC.VLO.HHZ. 2021-12-23T09:53:59.12 3.0 positive manual Pg 17.190001 0
GU.PCP.HHZ. 2021-12-23T09:53:50.77 3.0 undecidable manual Sg 12.88 0
IV.PAOL.HNZ. 2021-12-23T09:53:37.73 3.0 undecidable manual Sn -2.47 0
IV.GIZZ.HHZ. 2021-12-23T09:53:35.97 3.0 positive manual Pn 2.12 0
IV.CADC.EHZ. 2021-12-23T09:53:31.96 3.0 undecidable manual Sg 8.53 0
MN.TRI.HHZ. 2021-12-23T09:52:47.93 3.0 negative manual Pn 1.26 0
IV.IMOL.HNZ. 2021-12-23T09:52:38.83 3.0 undecidable manual S -3.45 0
IV.OFFI.HHZ. 2021-12-23T09:52:37.25 3.0 undecidable manual P 3.21 0
IV.FIU.EHZ. 2021-12-23T09:52:33.05 3.0 positive manual P -1.1 0
IV.MC2.EHZ. 2021-12-23T09:52:29.48 1.0 negative manual P 123 21.5673 50 0.44 22
IV.FDMO.HHZ. 2021-12-23T09:52:29.39 0.6 undecidable manual S 77 10.1787 137 -0.09 49
IV.ASSB.HHZ. 2021-12-23T09:52:29.36 0.6 undecidable manual P 277 25.0527 50 -0.21 47
IV.MML1.EHZ. 2021-12-23T09:52:29.72 0.6 undecidable manual S 3 10.7781 136 0.09 49
IV.NRCA.HHZ. 2021-12-23T09:52:29.05 3.0 positive manual P -2.68 0
IV.CESI.HHZ. 2021-12-23T09:52:28.54 0.6 undecidable manual S 255 5.0949 155 0.04 50
IV.CSP1.EHZ. 2021-12-23T09:52:28.91 0.6 undecidable manual P 67 21.1677 50 -0.06 49
IT.MTCL.HGE. 2021-12-23T09:52:28.17 0.6 undecidable manual S 132 3.7962 161 -0.15 49
IV.MML1.EHZ. 2021-12-23T09:52:27.37 0.3 undecidable manual P 3 10.7781 136 0 75
IV.FDMO.HHZ. 2021-12-23T09:52:27.29 0.1 positive manual P 77 10.1787 137 0 100
IT.MTCL.HGE. 2021-12-23T09:52:26.63 0.3 undecidable manual P 132 3.7962 161 0.01 76
IV.CESI.HHZ. 2021-12-23T09:52:26.78 0.1 undecidable manual P 255 5.0949 155 0.06 100
IV.SSFR.HHZ. 2021-12-23T09:52:17.22 3.0 undecidable manual P -1.68 0
IV.CPGN.EHZ. 2021-12-23T09:52:14.81 3.0 undecidable manual P -0.42 0
IV.PE3.EHZ. 2021-12-23T09:52:13.41 3.0 undecidable manual Pn 0.01 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CESI.HHE. ML:0.9 0.00012890043499999999 0.1024 AML other m 2021-12-23T09:52:28.77
IV.CESI.HHN. ML:1.3 0.0002785 0.12 AML other m 2021-12-23T09:52:28.79
IV.FDMO.HHE. ML:0.9 0.00009900000000000001 0.14 AML other m 2021-12-23T09:52:29.52
IV.FDMO.HHN. ML:0.8 0.00008099999999999999 0.2 AML other m 2021-12-23T09:52:29.73
IV.MML1.EHE. ML:0.8 0.000074175825 0.16 AML other m 2021-12-23T09:52:30.21
IV.MML1.EHN. ML:0.7 0.000052625165 0.1024 AML other m 2021-12-23T09:52:30.15
IV.SSFR.HHE. ML:0.3 0.0000072350915 0.2368 AML other m 2021-12-23T09:52:30.05
IV.SSFR.HHN. ML:0.6 0.000008101481 0.3392 AML other m 2021-12-23T09:52:23.56
IV.SSFR.HNE. ML:1.6 0.000104285475 0.576 AML other m 2021-12-23T09:52:26.21
IV.SSFR.HNN. ML:1.7 0.000129168395 0.5696 AML other m 2021-12-23T09:52:27.39
IV.CESI.HNE. ML:1.0 0.00014061557999999998 0.6912 AML other m 2021-12-23T09:52:28.35
IV.CESI.HNN. ML:1.3 0.00029439765 0.128 AML other m 2021-12-23T09:52:28.79
IV.MML1.HNE. ML:1.0 0.00010738502999999999 0.3456 AML other m 2021-12-23T09:52:30.63
IV.MML1.HNN. ML:1.0 0.00010895975 0.8512 AML other m 2021-12-23T09:52:47.31
IV.CSP1.EHE. ML:1.1 0.000078220185 1.5616 AML other m 2021-12-23T09:52:55.54
IV.CSP1.EHN. ML:0.9 0.00005113583 1.4976 AML other m 2021-12-23T09:52:54.33
IV.NRCA.HNE. ML:1.3 0.00011820405 0.6656 AML other m 2021-12-23T09:52:35.10
IV.NRCA.HNN. ML:1.6 0.0002480273 0.9536 AML other m 2021-12-23T09:53:04.99
IV.NRCA.HHE. ML:0.6 0.000022748320000000002 0.1152 AML other m 2021-12-23T09:52:32.99
IV.NRCA.HHN. ML:0.9 0.00004399245 0.1216 AML other m 2021-12-23T09:52:32.73
IV.MC2.EHE. ML:0.8 0.0000458262 1.4976 AML other m 2021-12-23T09:52:45.13
IV.MC2.EHN. ML:0.7 0.00003666920000000001 1.1008 AML other m 2021-12-23T09:52:53.61
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