Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.2 on date 20-10-2021 and time 12:42:36 (Italy) in region 7 km W Monte Cavallo (MC)

A magnitude ML 1.2 earthquake occured in region: 7 km W Monte Cavallo (MC), on

  • 20-10-2021 10:42:36 (UTC)
  • 20-10-2021 12:42:36 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.0110, 12.9220 at 6 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 7 145 145
Serravalle di Chienti MC 7 1070 1215
Pieve Torina MC 11 1458 2673
Muccia MC 13 915 3588
Sellano PG 14 1079 4667
Fiordimonte MC 14 202 4869
Pievebovigliana MC 15 866 5735
Valtopina PG 15 1398 7133
Sefro MC 15 422 7555
Nocera Umbra PG 15 5839 13394
Visso MC 16 1107 14501
Preci PG 18 724 15225
Camerino MC 18 6974 22199
Foligno PG 19 57155 79354
Ussita MC 19 444 79798
Fiastra MC 19 559 80357
Pioraco MC 19 1134 81491
Fiuminata MC 20 1402 82893

Municipalities with at least 50000 inhabitants

An earthquake occurred to
19 Km E of Foligno (57155 inhabitants)
45 Km E of Perugia (166134 inhabitants)
55 Km NE of Terni (111501 inhabitants)
75 Km NW of Teramo (54892 inhabitants)
83 Km SW of Ancona (100861 inhabitants)
83 Km NW of L'Aquila (69753 inhabitants)
93 Km S of Fano (60888 inhabitants)
94 Km NE of Viterbo (67173 inhabitants)
98 Km SE of Arezzo (99543 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 1.2 2021-10-20
10:42:36		 43.0113 12.922 6 2021-10-20
10:47:53		 Sala Sismica INGV-Roma 96798051
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-20 10:42:36 ± 0.11
Latitude 43.0113 ± 0.0036
Longitude 12.9220 ± 0.0049
Depth (km) 6 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 96798051

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 410
Semi-minor axis of confidence ellipse (meter) 50
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 46
Circular confidence region, given by single value of horizontal uncertainty (meter) 410.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 59
Number of associated phases, regardless of their use for origin computation 26
Number of defining phases 25
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.22
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.38401
Number of stations at which the event was observed 14
Number of stations from which data was used for origin computation 13
Magnitude information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.2
Num. used stations 18
Type of magnitude ML
Reference to an origin 96798051
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-20 10:47:53
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MURB.HHZ. 2021-10-20T10:42:52.25 0.6 undecidable manual S 311 42.624 98 0.39 43
IV.CRTC.HHZ. 2021-10-20T10:42:52.52 3.0 undecidable manual P 0.13 0
IV.GAVE.EHZ. 2021-10-20T10:42:49.26 0.6 undecidable manual S 184 35.4423 99 -0.16 46
IV.EL6.EHZ. 2021-10-20T10:42:49.98 0.6 undecidable manual S 22 38.1285 98 -0.36 44
IV.ATCC.EHZ. 2021-10-20T10:42:47.18 0.6 undecidable manual S 310 29.8479 101 -0.33 45
IV.SNTG.HHZ. 2021-10-20T10:42:46.63 0.6 undecidable manual S 3 27.0507 102 0.08 47
IV.NRCA.HHZ. 2021-10-20T10:42:46.07 0.6 undecidable manual S 142 25.1526 103 0.17 47
IV.MC2.EHZ. 2021-10-20T10:42:46.38 0.6 undecidable manual S 117 24.3534 103 0.75 39
IV.ASSB.HHZ. 2021-10-20T10:42:45.24 0.6 undecidable manual S 279 21.6672 105 0.52 43
IV.CSP1.EHZ. 2021-10-20T10:42:45.91 0.6 undecidable manual S 69 24.5532 103 0.19 46
IV.MURB.HHZ. 2021-10-20T10:42:45.08 0.6 negative manual P 311 42.624 98 -0.48 42
IV.EL6.EHZ. 2021-10-20T10:42:44.16 0.6 negative manual P 22 38.1285 98 -0.52 42
IV.GAVE.EHZ. 2021-10-20T10:42:44.03 0.6 undecidable manual P 184 35.4423 99 -0.12 46
IV.ATCC.EHZ. 2021-10-20T10:42:43.01 0.3 negative manual P 310 29.8479 101 -0.04 71
IV.SNTG.HHZ. 2021-10-20T10:42:43.03 0.3 negative manual P 3 27.0507 102 0.54 64
IV.MC2.EHZ. 2021-10-20T10:42:42.05 1.0 undecidable manual P 117 24.3534 103 0.09 24
IV.FDMO.HHZ. 2021-10-20T10:42:42.01 0.6 undecidable manual S 78 13.6752 113 -0.09 48
IV.ASSB.HHZ. 2021-10-20T10:42:41.49 0.6 undecidable manual P 279 21.6672 105 0.05 48
IV.MML1.EHZ. 2021-10-20T10:42:41.72 0.6 undecidable manual S 20 11.9769 115 0.15 48
IV.CSP1.EHZ. 2021-10-20T10:42:41.62 1.0 negative manual P 69 24.5532 103 -0.39 22
IV.NRCA.HHZ. 2021-10-20T10:42:41.94 0.3 negative manual P 142 25.1526 103 -0.18 70
IV.FDMO.HHZ. 2021-10-20T10:42:39.84 0.3 positive manual P 78 13.6752 113 -0.08 73
IV.MML1.EHZ. 2021-10-20T10:42:39.65 0.1 positive manual P 20 11.9769 115 0.03 98
IV.CESI.HHZ. 2021-10-20T10:42:38.16 0.1 positive manual P 243 1.5984 164 0.03 100
IT.MTCL.HGZ. 2021-10-20T10:42:38.58 0.1 undecidable manual P 107 6.5934 131 -0.12 97
IV.CESI.HHZ. 2021-10-20T10:42:38.82 0.6 undecidable manual S 243 1.5984 164 -0.18 48
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MML1.HNN. ML:1.5 0.0004735 0.18 AML other m 2021-10-20T10:42:41.81
IV.MML1.EHN. ML:1.5 0.000462 0.18 AML other m 2021-10-20T10:42:41.81
IV.MML1.EHE. ML:1.3 0.00028900000000000003 0.18 AML other m 2021-10-20T10:42:41.88
IV.MML1.HNE. ML:1.3 0.00030199999999999997 0.18 AML other m 2021-10-20T10:42:41.97
IV.FDMO.HHE. ML:1.0 0.0001295 0.4 AML other m 2021-10-20T10:42:42.28
IV.FDMO.HHN. ML:0.9 0.0001023 0.88 AML other m 2021-10-20T10:42:42.16
IV.ASSB.HHE. ML:1.2 0.0001255 0.56 AML other m 2021-10-20T10:42:45.45
IV.ASSB.HHN. ML:1.4 0.00021 0.14 AML other m 2021-10-20T10:42:45.56
IV.CSP1.EHE. ML:1.3 0.00012525 1.42 AML other m 2021-10-20T10:42:46.86
IV.NRCA.HHE. ML:1.1 0.00008560000000000001 0.12 AML other m 2021-10-20T10:42:46.39
IV.NRCA.HHN. ML:1.3 0.000124 0.12 AML other m 2021-10-20T10:42:46.88
IV.CSP1.EHN. ML:1.4 0.00016999999999999999 1.26 AML other m 2021-10-20T10:42:47.06
IV.SNTG.HHN. ML:0.8 0.000041 0.1 AML other m 2021-10-20T10:42:47.46
IV.SNTG.HHE. ML:0.9 0.0000502 0.1 AML other m 2021-10-20T10:42:47.66
IV.ATCC.EHE. ML:1.0 0.000054149999999999995 0.28 AML other m 2021-10-20T10:42:48.19
IV.ATCC.EHN. ML:1.0 0.0000483 0.62 AML other m 2021-10-20T10:42:48.81
IV.GAVE.EHE. ML:1.2 0.00006565 0.26 AML other m 2021-10-20T10:42:49.92
IV.GAVE.EHN. ML:1.1 0.0000523 0.54 AML other m 2021-10-20T10:42:52.13
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