Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.7 on date 04-10-2021 and time 13:37:48 (Italy) in region 4 km W Monte Cavallo (MC)

A magnitude ML 0.7 earthquake occured in region: 4 km W Monte Cavallo (MC), on

  • 04-10-2021 11:37:48 (UTC)
  • 04-10-2021 13:37:48 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.9990, 12.9580 at 15 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 8 1070 1215
Pieve Torina MC 9 1458 2673
Fiordimonte MC 12 202 2875
Muccia MC 12 915 3790
Sellano PG 12 1079 4869
Pievebovigliana MC 13 866 5735
Visso MC 13 1107 6842
Preci PG 15 724 7566
Ussita MC 16 444 8010
Sefro MC 17 422 8432
Fiastra MC 17 559 8991
Camerino MC 18 6974 15965
Valtopina PG 18 1398 17363
Acquacanina MC 18 121 17484
Nocera Umbra PG 19 5839 23323
Castelsantangelo sul Nera MC 20 281 23604

Municipalities with at least 50000 inhabitants

An earthquake occurred to
21 Km E of Foligno (57155 inhabitants)
48 Km E of Perugia (166134 inhabitants)
55 Km NE of Terni (111501 inhabitants)
72 Km NW of Teramo (54892 inhabitants)
80 Km NW of L'Aquila (69753 inhabitants)
83 Km SW of Ancona (100861 inhabitants)
94 Km S of Fano (60888 inhabitants)
95 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 2021-10-04
11:37:48		 42.9988 12.9582 15 2021-10-04
12:26:44		 Sala Sismica INGV-Roma 96204841
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-04 11:37:48 ± 0.04
Latitude 42.9988 ± 0.0018
Longitude 12.9582 ± 0.0025
Depth (km) 15 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 96204841

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 235
Semi-minor axis of confidence ellipse (meter) 75
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 261
Circular confidence region, given by single value of horizontal uncertainty (meter) 230.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 76
Number of associated phases, regardless of their use for origin computation 26
Number of defining phases 23
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) 0.40020
Number of stations at which the event was observed 15
Number of stations from which data was used for origin computation 12
Magnitude information

ML:0.7

Field Value
Value 0.7
Uncertainty 0.2
Num. used stations 13
Type of magnitude ML
Reference to an origin 96204841
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-04 12:26:44
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.RIBO.EHZ.01 2021-10-04T11:38:32.00 3.0 undecidable manual S 1.37 0
IV.LNSS.HHZ. 2021-10-04T11:38:03.09 0.3 undecidable manual S 171 44.4222 97 -0.12 69
IV.GAVE.HNZ. 2021-10-04T11:38:00.64 0.3 undecidable manual S 189 34.4433 100 0.08 70
IV.ASSB.HHZ. 2021-10-04T11:37:58.03 0.3 undecidable manual S 281 24.753 106 -0.02 73
IV.SNTG.HHZ. 2021-10-04T11:37:58.99 0.3 undecidable manual S 357 28.4493 103 -0.02 71
IV.CSP1.EHZ. 2021-10-04T11:37:57.44 0.3 undecidable manual S 63 22.4553 109 -0.03 72
IV.MC2.EHZ. 2021-10-04T11:37:57.44 0.3 undecidable manual S 117 21.0678 111 0.32 68
IV.LNSS.HHZ. 2021-10-04T11:37:57.15 0.6 undecidable manual P 171 44.4222 97 0.01 47
IV.NRCA.HHZ. 2021-10-04T11:37:57.29 0.3 undecidable manual S 145 22.2555 109 -0.13 72
IV.MOMA.HHE. 2021-10-04T11:37:56.36 0.6 undecidable manual P 236 38.2284 98 0.17 46
IV.SRES.HHZ. 2021-10-04T11:37:56.22 3.0 positive manual P 0.2 0
IV.MML1.EHZ. 2021-10-04T11:37:55.20 0.3 undecidable manual S 5 12.7761 129 0.02 74
IV.GAVE.HNZ. 2021-10-04T11:37:55.46 0.6 undecidable manual P 189 34.4433 100 -0.15 47
IV.SNTG.HHZ. 2021-10-04T11:37:54.71 0.1 undecidable manual P 357 28.4493 103 0 96
IV.SMA1.EHZ. 2021-10-04T11:37:54.75 3.0 undecidable manual P 0
IV.FDMO.HHZ. 2021-10-04T11:37:54.61 0.3 undecidable manual S 68 11.2776 134 -0.27 71
IV.FEMA.HNZ. 2021-10-04T11:37:54.35 0.3 undecidable manual S 119 8.4804 143 -0.04 75
IV.ASSB.HHZ. 2021-10-04T11:37:54.10 0.1 undecidable manual P 281 24.753 106 -0.06 96
IV.CESI.HHZ. 2021-10-04T11:37:53.90 0.3 undecidable manual S 279 4.3956 160 0.03 74
IV.NRCA.HHZ. 2021-10-04T11:37:53.64 0.1 undecidable manual P 145 22.2555 109 -0.15 95
IV.CSP1.EHZ. 2021-10-04T11:37:53.84 0.1 undecidable manual P 63 22.4553 109 0.01 97
IV.MC2.EHZ. 2021-10-04T11:37:53.63 0.6 undecidable manual P 117 21.0678 111 0.01 49
IV.MML1.EHZ. 2021-10-04T11:37:52.68 0.1 undecidable manual P 5 12.7761 129 0.18 96
IV.FDMO.HHZ. 2021-10-04T11:37:52.28 0.1 undecidable manual P 68 11.2776 134 -0.05 98
IV.FEMA.HNZ. 2021-10-04T11:37:52.19 0.3 undecidable manual P 119 8.4804 143 0.15 72
IV.CESI.HHZ. 2021-10-04T11:37:51.69 0.1 undecidable manual P 279 4.3956 160 -0.05 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHN. ML:0.5 0.000022056045 0.064 AML other m 2021-10-04T11:37:58.08
IV.NRCA.HHE. ML:0.8 0.00003515 1.28 AML other m 2021-10-04T11:37:57.90
IV.CESI.HHN. ML:0.6 0.000043978455 0.1408 AML other m 2021-10-04T11:37:54.13
IV.CESI.HHE. ML:0.5 0.000040002245 0.096 AML other m 2021-10-04T11:37:54.26
IV.FDMO.HHN. ML:0.9 0.000077969455 0.224 AML other m 2021-10-04T11:37:54.89
IV.FDMO.HHE. ML:0.9 0.000067628305 0.16 AML other m 2021-10-04T11:37:55.08
IV.MML1.EHE. ML:0.6 0.000035831111 0.1408 AML other m 2021-10-04T11:37:55.76
IV.MML1.EHN. ML:0.6 0.000035421135 0.1216 AML other m 2021-10-04T11:37:55.61
IV.ASSB.HHE. ML:0.9 0.000044018435 0.1408 AML other m 2021-10-04T11:37:58.26
IV.ASSB.HHN. ML:0.9 0.00003960202999999999 0.1408 AML other m 2021-10-04T11:37:58.41
IV.MML1.HNE. ML:0.7 0.00004025126 0.1216 AML other m 2021-10-04T11:37:55.51
IV.MML1.HNN. ML:0.0 0 0.2176 AML other m 2021-10-04T11:37:55.64
IV.SNTG.HHE. ML:0.5 0.00001614482 0.1152 AML other m 2021-10-04T11:37:59.39
IV.SNTG.HHN. ML:0.5 0.000013289694 0.1216 AML other m 2021-10-04T11:37:59.41
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