Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.0 on date 30-12-2021 and time 20:10:26 (Italy) in region 2 km SE Monte Cavallo (MC)

A magnitude ML 1.0 earthquake occured in region: 2 km SE Monte Cavallo (MC), on

  • 30-12-2021 19:10:26 (UTC)
  • 30-12-2021 20:10:26 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.9850, 13.0230 at 13 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 2 145 145
Pieve Torina MC 7 1458 1603
Visso MC 8 1107 2710
Fiordimonte MC 8 202 2912
Pievebovigliana MC 10 866 3778
Ussita MC 11 444 4222
Muccia MC 11 915 5137
Serravalle di Chienti MC 11 1070 6207
Preci PG 12 724 6931
Fiastra MC 12 559 7490
Sellano PG 13 1079 8569
Acquacanina MC 13 121 8690
Castelsantangelo sul Nera MC 15 281 8971
Bolognola MC 17 142 9113
Camerino MC 17 6974 16087
Sefro MC 19 422 16509

Municipalities with at least 50000 inhabitants

An earthquake occurred to
26 Km E of Foligno (57155 inhabitants)
53 Km E of Perugia (166134 inhabitants)
56 Km NE of Terni (111501 inhabitants)
66 Km NW of Teramo (54892 inhabitants)
77 Km NW of L'Aquila (69753 inhabitants)
81 Km SW of Ancona (100861 inhabitants)
96 Km S of Fano (60888 inhabitants)
98 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 1.0 2021-12-30
19:10:26		 42.9852 13.0227 13 2021-12-30
19:14:51		 Sala Sismica INGV-Roma 99167101
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-12-30 19:10:26 ± 0.05
Latitude 42.9852 ± 0.0027
Longitude 13.0227 ± 0.0025
Depth (km) 13 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 99167101

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 304
Semi-minor axis of confidence ellipse (meter) 133
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 26
Circular confidence region, given by single value of horizontal uncertainty (meter) 300.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 126
Number of associated phases, regardless of their use for origin computation 28
Number of defining phases 26
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.13
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.34354
Number of stations at which the event was observed 15
Number of stations from which data was used for origin computation 13
Magnitude information

ML:1.0

Field Value
Value 1.0
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 99167101
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-12-30 19:14:51
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.SSFR.HHZ. 2021-12-30T19:10:44.06 3.0 undecidable manual S -0.11 0
IV.ATCC.EHZ. 2021-12-30T19:10:39.16 0.6 undecidable manual S 306 38.1285 94 0.36 44
IV.ATFO.HHZ. 2021-12-30T19:10:37.10 3.0 undecidable manual P 0.55 0
IV.SNTG.HHZ. 2021-12-30T19:10:36.81 0.6 undecidable manual S 348 30.6471 95 0 48
IV.ASSB.HHZ. 2021-12-30T19:10:36.49 0.6 undecidable manual S 282 30.2475 95 -0.19 46
IV.MMO1.EHZ. 2021-12-30T19:10:35.66 0.6 undecidable manual S 111 26.4513 97 -0.04 48
IV.PF6.EHZ. 2021-12-30T19:10:34.43 0.6 undecidable manual S 39 21.9669 100 -0.06 48
IV.NRCA.HHZ. 2021-12-30T19:10:33.44 0.6 undecidable manual S 156 18.3705 105 -0.14 48
IV.CSP1.EHZ. 2021-12-30T19:10:33.91 0.6 undecidable manual S 51 18.9699 104 0.2 47
IV.ATCC.EHZ. 2021-12-30T19:10:33.45 0.6 positive manual P 306 38.1285 94 0 47
IV.MC2.EHZ. 2021-12-30T19:10:33.01 0.6 undecidable manual S 121 15.7731 110 0.1 48
IV.ASSB.HHZ. 2021-12-30T19:10:32.10 0.3 positive manual P 282 30.2475 95 -0.13 70
IV.SNTG.HHZ. 2021-12-30T19:10:32.25 0.6 undecidable manual P 348 30.6471 95 -0.05 47
IV.MML1.EHZ. 2021-12-30T19:10:32.51 0.6 undecidable manual S 344 14.7741 113 -0.16 48
IV.MMO1.EHZ. 2021-12-30T19:10:31.62 0.6 positive manual P 111 26.4513 97 -0.04 48
IV.FDMO.HHZ. 2021-12-30T19:10:31.07 0.6 undecidable manual S 43 7.7811 139 -0.07 49
IV.CESI.HHZ. 2021-12-30T19:10:31.73 0.6 undecidable manual S 283 9.7791 131 0.19 48
IT.MTCL.HGZ. 2021-12-30T19:10:30.13 0.6 undecidable manual S 297 2.0979 168 -0.34 47
IV.MC2.EHZ. 2021-12-30T19:10:30.15 0.6 positive manual P 121 15.7731 110 0.1 48
IV.NRCA.HHZ. 2021-12-30T19:10:30.33 0.3 undecidable manual P 156 18.3705 105 -0.11 72
IV.CSP1.EHZ. 2021-12-30T19:10:30.60 0.1 positive manual P 51 18.9699 104 0.09 96
IV.PF6.EHZ. 2021-12-30T19:10:30.72 0.1 undecidable manual P 39 21.9669 100 -0.25 93
IV.FEMA.HNZ. 2021-12-30T19:10:30.52 0.6 undecidable manual S 139 3.3966 161 -0.04 50
IV.MML1.EHZ. 2021-12-30T19:10:29.97 1.0 negative manual P 344 14.7741 113 0.05 24
IV.FDMO.HHZ. 2021-12-30T19:10:29.02 0.1 undecidable manual P 43 7.7811 139 -0.01 100
IV.CESI.HHZ. 2021-12-30T19:10:29.36 0.1 negative manual P 283 9.7791 131 0.1 98
IV.FEMA.HNZ. 2021-12-30T19:10:28.96 0.1 undecidable manual P 139 3.3966 161 0.26 95
IT.MTCL.HGZ. 2021-12-30T19:10:28.69 0.1 undecidable manual P 297 2.0979 168 0.04 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FDMO.HHE. ML:1.3 0.000221 0.22 AML other m 2021-12-30T19:10:31.30
IV.FDMO.HHN. ML:1.1 0.000153 0.44 AML other m 2021-12-30T19:10:31.42
IV.CESI.HHN. ML:1.0 0.00011399999999999999 0.2 AML other m 2021-12-30T19:10:31.77
IV.CESI.HHE. ML:0.8 0.00006840000000000001 0.18 AML other m 2021-12-30T19:10:31.77
IV.MML1.EHE. ML:0.8 0.000051200000000000004 1.44 AML other m 2021-12-30T19:10:32.27
IV.MML1.EHN. ML:0.7 0.00004075 1.56 AML other m 2021-12-30T19:10:33.07
IV.NRCA.HHN. ML:1.1 0.00009440000000000002 0.12 AML other m 2021-12-30T19:10:33.44
IV.NRCA.HHE. ML:0.9 0.00006715 1.4 AML other m 2021-12-30T19:10:34.25
IV.ASSB.HHE. ML:0.9 0.000041 1.34 AML other m 2021-12-30T19:10:36.29
IV.ASSB.HHN. ML:1.0 0.0000458 0.2 AML other m 2021-12-30T19:10:37.30
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