Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.3 on date 22-03-2021 and time 04:03:25 (UTC) in region 4 km S Monte Cavallo (MC)

A magnitude ML 1.3 earthquake occured in region: 4 km S Monte Cavallo (MC), on

  • 22-03-2021 04:03:25 (UTC)
  • 22-03-2021 05:03:25 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.9600, 13.0120 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
Visso MC 7 1107 1252
Preci PG 9 724 1976
Pieve Torina MC 10 1458 3434
Sellano PG 10 1079 4513
Ussita MC 11 444 4957
Fiordimonte MC 11 202 5159
Pievebovigliana MC 13 866 6025
Serravalle di Chienti MC 13 1070 7095
Castelsantangelo sul Nera MC 14 281 7376
Muccia MC 14 915 8291
Fiastra MC 15 559 8850
Acquacanina MC 16 121 8971
Cerreto di Spoleto PG 17 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)
53 Km E of Perugia (166134 inhabitants)
53 Km NE of Terni (111501 inhabitants)
66 Km NW of Teramo (54892 inhabitants)
75 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
Bulletin
Rev1000 		ML 1.3 2021-03-22
04:03:25		 42.9602 13.0118 9 2021-07-12
16:55:12		 Bollettino Sismico Italiano INGV 90512351
Reviewed
Rev100 		ML 1.1 2021-03-22
04:03:25		 42.9608 13.0068 10 2021-03-22
04:10:48		 Sala Sismica INGV-Roma 88364841
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-03-22 04:03:25 ± 0.09
Latitude 42.9602 ± 0.0027
Longitude 13.0118 ± 0.0049
Depth (km) 9 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 90512351

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 420
Semi-minor axis of confidence ellipse (meter) 176
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 66
Circular confidence region, given by single value of horizontal uncertainty (meter) 420.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 123
Number of associated phases, regardless of their use for origin computation 21
Number of defining phases 21
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) 0.02788
Epicentral distance of station farthest from the epicenter (degree) 0.35793
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 11
Magnitudes information

ML:1.3

Field Value
Value 1.3
Uncertainty 0.3
Num. used stations 10
Type of magnitude ML
Reference to an origin 90512351
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-05-26 15:18:57

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 88364841
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-03-22 04:10:48
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.LNSS.HNZ. 2021-03-22T04:03:39.18 0.6 undecidable manual S 177 39.7269 50 -0.22 46
IV.MF5.EHN. 2021-03-22T04:03:38.75 1.0 undecidable manual S 85 36.4413 50 0.22 23
IV.MMO1.EHZ. 2021-03-22T04:03:35.30 0.3 undecidable manual S 105 26.4513 108 -0.16 71
IV.PF6.EHZ. 2021-03-22T04:03:34.56 0.3 undecidable manual S 37 24.6531 109 -0.31 69
IV.LNSS.HNZ. 2021-03-22T04:03:33.26 1.0 undecidable manual P 177 39.7269 50 -0.39 22
IV.MF5.EHN. 2021-03-22T04:03:33.62 1.0 undecidable manual P 85 36.4413 50 0.47 22
IV.CSP1.EHZ. 2021-03-22T04:03:33.87 0.3 undecidable manual S 47 21.3675 112 0.05 73
IV.MML1.HNZ. 2021-03-22T04:03:32.37 0.3 undecidable manual S 349 17.2716 117 -0.15 72
IV.NRCA.HHZ. 2021-03-22T04:03:32.22 0.3 undecidable manual S 149 16.3725 118 0 74
IV.MMO1.EHZ. 2021-03-22T04:03:31.63 1.0 undecidable manual P 105 26.4513 108 0.25 23
IV.CESI.HHZ. 2021-03-22T04:03:30.42 0.6 undecidable manual S 300 9.9789 131 0.02 50
IV.PF6.EHZ. 2021-03-22T04:03:30.77 1.0 undecidable manual P 37 24.6531 109 -0.27 23
IV.CSP1.EHZ. 2021-03-22T04:03:30.90 0.6 undecidable manual P 47 21.3675 112 0.47 45
IV.MC2.EHZ. 2021-03-22T04:03:29.40 1.0 undecidable manual P 111 15.3735 119 0.06 25
IV.MML1.HNZ. 2021-03-22T04:03:29.77 0.6 undecidable manual P 349 17.2716 117 0.09 49
IV.NRCA.HHZ. 2021-03-22T04:03:29.42 0.1 positive manual P 149 16.3725 118 -0.09 98
IV.CESI.HHZ. 2021-03-22T04:03:28.48 0.1 undecidable manual P 300 9.9789 131 0.02 100
IV.FEMA.HNZ. 2021-03-22T04:03:28.91 0.3 undecidable manual S 86 3.0969 160 -0.08 75
IT.MTCL.HGZ. 2021-03-22T04:03:28.72 1.0 undecidable manual S 345 3.8961 156 -0.38 23
IV.FEMA.HNZ. 2021-03-22T04:03:28.11 0.3 undecidable manual P 86 3.0969 160 0.47 69
IT.MTCL.HGZ. 2021-03-22T04:03:27.90 1.0 undecidable manual P 345 3.8961 156 0.2 24
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHN. ML:1.2 0.000162 0.62 AML other m 2021-03-22T04:03:33.05
IV.NRCA.HHE. ML:1.2 0.0001481972 0.08 AML other m 2021-03-22T04:03:33.24
IV.CESI.HHE. ML:0.8 0.00009574605999999999 1.68 AML other m 2021-03-22T04:03:30.53
IV.CESI.HHN. ML:0.9 0.000099800705 1.2992 AML other m 2021-03-22T04:03:31.34
IV.CESI.HNN. ML:1.1 0.00016308675000000002 1.1808 AML other m 2021-03-22T04:03:30.26
IV.CESI.HNE. ML:1.1 0.0001688913 1.7888 AML other m 2021-03-22T04:03:31.58
IV.NRCA.HNE. ML:1.4 0.0002412744 1.3024 AML other m 2021-03-22T04:03:33.33
IV.NRCA.HNN. ML:1.5 0.0003017242 3.2384 AML other m 2021-03-22T04:03:33.05
IV.CSP1.EHN. ML:1.7 0.0003820984 2.32 AML other m 2021-03-22T04:03:35.33
IV.CSP1.EHE. ML:1.6 0.0002570288 1.9616 AML other m 2021-03-22T04:03:35.58
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