Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.2 on date 04-02-2021 and time 18:58:46 (Italy) in region 4 km SE Monte Cavallo (MC)

A magnitude ML 1.2 earthquake occured in region: 4 km SE Monte Cavallo (MC), on

  • 04-02-2021 17:58:46 (UTC)
  • 04-02-2021 18:58:46 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.9600, 13.0170 at 12 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
Visso MC 7 1107 1252
Preci PG 9 724 1976
Pieve Torina MC 10 1458 3434
Ussita MC 10 444 3878
Fiordimonte MC 11 202 4080
Sellano PG 11 1079 5159
Pievebovigliana MC 13 866 6025
Castelsantangelo sul Nera MC 13 281 6306
Serravalle di Chienti MC 14 1070 7376
Muccia MC 14 915 8291
Fiastra MC 14 559 8850
Acquacanina MC 15 121 8971
Cerreto di Spoleto PG 18 1075 10046
Bolognola MC 18 142 10188
Norcia PG 20 4957 15145

Municipalities with at least 50000 inhabitants

An earthquake occurred to
25 Km E of Foligno (57155 inhabitants)
54 Km NE of Terni (111501 inhabitants)
54 Km E of Perugia (166134 inhabitants)
65 Km NW of Teramo (54892 inhabitants)
74 Km NW of L'Aquila (69753 inhabitants)
84 Km SW of Ancona (100861 inhabitants)
96 Km NE of Viterbo (67173 inhabitants)
98 Km S of Fano (60888 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 2021-02-04
17:58:46		 42.9595 13.0172 12 2021-02-04
18:08:27		 Sala Sismica INGV-Roma 86833651
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-02-04 17:58:46 ± 0.06
Latitude 42.9595 ± 0.0036
Longitude 13.0172 ± 0.0037
Depth (km) 12 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 86833651

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 345
Semi-minor axis of confidence ellipse (meter) 190
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 180
Circular confidence region, given by single value of horizontal uncertainty (meter) 350.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 94
Number of associated phases, regardless of their use for origin computation 24
Number of defining phases 24
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.18
Epicentral distance of station closest to the epicenter (degree) 0.02428
Epicentral distance of station farthest from the epicenter (degree) 0.36243
Number of stations at which the event was observed 12
Number of stations from which data was used for origin computation 12
Magnitude information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.3
Num. used stations 12
Type of magnitude ML
Reference to an origin 86833651
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-02-04 18:08:27
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MOMA.HNE. 2021-02-04T17:59:00.25 0.6 undecidable manual S 245 40.2264 92 0.62 41
IV.ASSB.HHZ. 2021-02-04T17:58:56.84 0.3 undecidable manual S 288 30.5472 93 -0.19 69
IV.PF6.EHZ. 2021-02-04T17:58:55.50 0.3 undecidable manual S 36 24.4533 95 0.08 71
IV.MMO1.EHZ. 2021-02-04T17:58:55.73 0.3 undecidable manual S 105 26.0517 94 -0.11 70
IV.CSP1.EHZ. 2021-02-04T17:58:54.68 0.3 undecidable manual S 46 21.1677 97 0.14 71
IV.MOMA.HNE. 2021-02-04T17:58:54.45 0.6 undecidable manual P 245 40.2264 92 0.4 43
IV.MML1.HNZ. 2021-02-04T17:58:53.45 0.3 undecidable manual S 348 17.4714 101 -0.13 72
IV.MC2.EHZ. 2021-02-04T17:58:53.03 0.3 undecidable manual S 111 14.9739 108 0.11 72
IV.ASSB.HHZ. 2021-02-04T17:58:52.22 0.3 undecidable manual P 288 30.5472 93 -0.33 67
IV.NRCA.HHZ. 2021-02-04T17:58:52.78 0.3 undecidable manual S 151 16.0728 105 -0.42 67
IV.FDMO.HHZ. 2021-02-04T17:58:51.83 0.3 undecidable manual S 34 10.2786 125 0.03 74
IV.CESI.HHZ. 2021-02-04T17:58:51.84 0.3 undecidable manual S 299 10.4784 125 0 74
IV.PF6.EHZ. 2021-02-04T17:58:51.57 0.3 undecidable manual P 36 24.4533 95 -0.05 72
IV.CSP1.EHZ. 2021-02-04T17:58:51.18 0.3 undecidable manual P 46 21.1677 97 0.07 72
IV.MMO1.EHZ. 2021-02-04T17:58:51.69 0.3 undecidable manual P 105 26.0517 94 -0.17 70
IV.MML1.HNZ. 2021-02-04T17:58:50.56 0.3 undecidable manual P 348 17.4714 101 0 73
IV.NRCA.HHZ. 2021-02-04T17:58:50.15 0.3 undecidable manual P 151 16.0728 105 -0.19 70
IV.MC2.EHZ. 2021-02-04T17:58:50.28 0.3 undecidable manual P 111 14.9739 108 0.11 72
IT.MTCL.HGZ. 2021-02-04T17:58:50.50 0.3 undecidable manual S 339 4.0959 156 -0.26 72
IV.FEMA.HNZ. 2021-02-04T17:58:50.77 0.3 undecidable manual S 84 2.6973 164 0.14 73
IV.FEMA.HNZ. 2021-02-04T17:58:49.03 0.1 undecidable manual P 84 2.6973 164 0.18 97
IV.FDMO.HHZ. 2021-02-04T17:58:49.63 0.1 undecidable manual P 34 10.2786 125 0.1 97
IV.CESI.HHZ. 2021-02-04T17:58:49.63 0.1 undecidable manual P 299 10.4784 125 0.08 98
IT.MTCL.HGZ. 2021-02-04T17:58:48.93 0.1 undecidable manual P 339 4.0959 156 0 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FDMO.HHN. ML:1.2 0.000174 0.18 AML other m 2021-02-04T17:58:51.96
IV.FDMO.HHE. ML:1.1 0.000155 1.8 AML other m 2021-02-04T17:58:52.91
IV.CESI.HHN. ML:1.7 0.0004995 0.1 AML other m 2021-02-04T17:58:52.10
IV.CESI.HHE. ML:1.5 0.00032499999999999993 0.1 AML other m 2021-02-04T17:58:52.05
IV.NRCA.HHN. ML:0.9 0.00006994999999999999 1.68 AML other m 2021-02-04T17:58:52.06
IV.NRCA.HHE. ML:0.8 0.000057169655 0.0896 AML other m 2021-02-04T17:58:53.58
IV.ASSB.HHE. ML:0.9 0.00003545 1.8 AML other m 2021-02-04T17:58:56.95
IV.ASSB.HHN. ML:0.8 0.000029999999999999997 1.52 AML other m 2021-02-04T17:58:57.06
IV.CESI.HNE. ML:1.4 0.0002610707 0.1024 AML other m 2021-02-04T17:58:52.10
IV.CESI.HNN. ML:1.6 0.00049046705 0.1024 AML other m 2021-02-04T17:58:52.05
IV.CSP1.EHE. ML:1.3 0.000127731475 2.2016 AML other m 2021-02-04T17:58:54.84
IV.CSP1.EHN. ML:1.2 0.00010751456499999999 0.4224 AML other m 2021-02-04T17:58:55.23
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