Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.2 on date 27-03-2021 and time 18:27:30 (Italy) in region 4 km W Monte Cavallo (MC)

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

  • 27-03-2021 17:27:30 (UTC)
  • 27-03-2021 18:27:30 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.9870, 12.9500 at 9 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

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 10 1070 1215
Pieve Torina MC 11 1458 2673
Sellano PG 11 1079 3752
Fiordimonte MC 13 202 3954
Visso MC 13 1107 5061
Muccia MC 13 915 5976
Pievebovigliana MC 14 866 6842
Preci PG 14 724 7566
Ussita MC 16 444 8010
Fiastra MC 18 559 8569
Valtopina PG 18 1398 9967
Sefro MC 18 422 10389
Cerreto di Spoleto PG 19 1075 11464
Nocera Umbra PG 19 5839 17303
Acquacanina MC 19 121 17424
Camerino MC 19 6974 24398
Castelsantangelo sul Nera MC 20 281 24679

Municipalities with at least 50000 inhabitants

An earthquake occurred to
20 Km E of Foligno (57155 inhabitants)
48 Km E of Perugia (166134 inhabitants)
53 Km NE of Terni (111501 inhabitants)
72 Km NW of Teramo (54892 inhabitants)
80 Km NW of L'Aquila (69753 inhabitants)
84 Km SW of Ancona (100861 inhabitants)
94 Km NE of Viterbo (67173 inhabitants)
96 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
Bulletin
Rev1000 		ML 1.2 2021-03-27
17:27:30		 42.9867 12.9498 9 2021-07-12
16:55:07		 Bollettino Sismico Italiano INGV 89321521
Reviewed
Rev100 		ML 1.1 2021-03-27
17:27:31		 42.9877 12.945 6 2021-03-27
17:37:55		 Sala Sismica INGV-Roma 88528021
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-03-27 17:27:30 ± 0.04
Latitude 42.9867 ± 0.0027
Longitude 12.9498 ± 0.0037
Depth (km) 9 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 89321521

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 275
Semi-minor axis of confidence ellipse (meter) 232
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 41
Circular confidence region, given by single value of horizontal uncertainty (meter) 280.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 48
Number of associated phases, regardless of their use for origin computation 35
Number of defining phases 32
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.17
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.46225
Number of stations at which the event was observed 20
Number of stations from which data was used for origin computation 17
Magnitudes information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.1
Num. used stations 6
Type of magnitude ML
Reference to an origin 89321521
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-04-21 08:06:30

ML:1.1

Field Value
Value 1.1
Uncertainty 0.1
Num. used stations 6
Type of magnitude ML
Reference to an origin 88528021
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-03-27 17:37:55
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.RIBO.EHZ.01 2021-03-27T17:28:14.53 3.0 undecidable manual S -0.48 0
IV.PESA.HHZ. 2021-03-27T17:27:57.46 3.0 undecidable manual S 0.29 0
IV.LNSS.HNZ. 2021-03-27T17:27:45.03 0.6 undecidable manual S 170 43.2234 50 -0.03 47
IV.CPGN.EHZ. 2021-03-27T17:27:44.16 3.0 undecidable manual P -0.83 0
IV.FOSV.EHZ. 2021-03-27T17:27:43.59 0.6 undecidable manual S 336 37.4292 50 0.07 47
IV.GAVE.EHN. 2021-03-27T17:27:42.48 0.6 undecidable manual S 188 32.9448 50 0.16 46
IV.ATCC.EHZ. 2021-03-27T17:27:42.50 0.3 undecidable manual S 311 33.4443 50 0.06 71
IV.MMO1.EHZ. 2021-03-27T17:27:41.74 0.3 undecidable manual S 107 32.1456 50 -0.36 67
IV.CESX.HHE. 2021-03-27T17:27:40.10 0.6 undecidable manual P 215 51.3153 50 -0.08 46
IV.ASSB.HHZ. 2021-03-27T17:27:39.48 0.3 undecidable manual S 285 24.4533 110 -0.11 71
IV.CSP1.EHZ. 2021-03-27T17:27:39.40 0.3 undecidable manual S 60 23.754 110 0.03 72
IV.PF6.EHZ. 2021-03-27T17:27:39.67 0.3 undecidable manual S 50 25.9518 109 -0.42 67
IV.MC2.EHZ. 2021-03-27T17:27:38.95 0.6 undecidable manual S 113 21.1677 113 0.43 45
IV.FOSV.EHZ. 2021-03-27T17:27:38.36 0.1 undecidable manual P 336 37.4292 50 0.31 89
IV.LNSS.HNZ. 2021-03-27T17:27:38.89 0.1 undecidable manual P 170 43.2234 50 -0.05 93
IV.NRCA.HHZ. 2021-03-27T17:27:38.75 0.6 undecidable manual S 142 21.5673 112 0.08 48
IV.ATCC.EHZ. 2021-03-27T17:27:37.36 0.3 undecidable manual P 311 33.4443 50 -0.07 71
IV.MOMA.HNZ. 2021-03-27T17:27:37.87 0.6 undecidable manual P 237 36.9297 50 -0.1 47
IV.GAVE.EHN. 2021-03-27T17:27:37.28 0.1 undecidable manual P 188 32.9448 50 -0.08 94
IV.MMO1.EHZ. 2021-03-27T17:27:37.02 0.3 undecidable manual P 107 32.1456 50 -0.21 69
IV.MML1.HNZ. 2021-03-27T17:27:36.43 0.3 undecidable manual S 7 14.1747 122 0.05 73
IV.NRCA.HHZ. 2021-03-27T17:27:35.32 0.3 undecidable manual P 142 21.5673 112 0.07 72
IV.PF6.EHZ. 2021-03-27T17:27:35.80 0.6 undecidable manual P 50 25.9518 109 -0.27 46
IV.ASSB.HHZ. 2021-03-27T17:27:35.65 0.3 undecidable manual P 285 24.4533 110 -0.13 71
IV.MC2.EHZ. 2021-03-27T17:27:35.34 0.6 undecidable manual P 113 21.1677 113 0.18 47
IV.FDMO.HHZ. 2021-03-27T17:27:35.82 0.3 undecidable manual S 64 12.4764 125 -0.05 74
IV.CSP1.EHZ. 2021-03-27T17:27:35.90 0.3 undecidable manual P 60 23.754 110 0.25 69
IV.FEMA.HNZ. 2021-03-27T17:27:34.80 0.3 undecidable manual S 108 8.5803 136 -0.04 74
IV.MML1.HNZ. 2021-03-27T17:27:34.15 0.3 undecidable manual P 7 14.1747 122 0.22 71
IT.MTCL.HGZ. 2021-03-27T17:27:33.51 0.6 undecidable manual S 79 4.0959 155 -0.45 46
IV.FEMA.HNZ. 2021-03-27T17:27:33.35 0.3 undecidable manual P 108 8.5803 136 0.31 70
IV.CESI.HHZ. 2021-03-27T17:27:33.68 0.6 undecidable manual S 299 4.1958 155 -0.29 47
IV.FDMO.HHZ. 2021-03-27T17:27:33.85 0.1 positive manual P 64 12.4764 125 0.22 95
IT.MTCL.HGZ. 2021-03-27T17:27:32.50 0.1 undecidable manual P 79 4.0959 155 -0.03 100
IV.CESI.HHZ. 2021-03-27T17:27:32.63 0.3 undecidable manual P 299 4.1958 155 0.09 74
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FDMO.HHE. ML:1.0 0.0001228 1.72 AML other m 2021-03-27T17:27:35.13
IV.FDMO.HHN. ML:1.0 0.00012945 0.18 AML other m 2021-03-27T17:27:36.34
IV.NRCA.HHN. ML:1.3 0.00014700000000000002 0.14 AML other m 2021-03-27T17:27:39.04
IV.NRCA.HHE. ML:1.2 0.0001175 0.42 AML other m 2021-03-27T17:27:39.31
IV.ASSB.HHN. ML:1.2 0.00009989999999999999 1.78 AML other m 2021-03-27T17:27:40.94
IV.ASSB.HHE. ML:1.1 0.00008335 0.42 AML other m 2021-03-27T17:27:40.93
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