Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.0 on date 27-03-2021 and time 04:34:18 (Italy) in region 5 km S Monte Cavallo (MC)

A magnitude ML 1.0 earthquake occured in region: 5 km S Monte Cavallo (MC), on

  • 27-03-2021 03:34:18 (UTC)
  • 27-03-2021 04:34:18 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.9500, 13.0170 at 12 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 5 145 145
Visso MC 6 1107 1252
Preci PG 8 724 1976
Sellano PG 10 1079 3055
Ussita MC 10 444 3499
Pieve Torina MC 11 1458 4957
Fiordimonte MC 11 202 5159
Castelsantangelo sul Nera MC 13 281 5440
Pievebovigliana MC 14 866 6306
Serravalle di Chienti MC 15 1070 7376
Fiastra MC 15 559 7935
Muccia MC 15 915 8850
Acquacanina MC 16 121 8971
Cerreto di Spoleto PG 17 1075 10046
Bolognola MC 18 142 10188
Norcia PG 19 4957 15145

Municipalities with at least 50000 inhabitants

An earthquake occurred to
25 Km E of Foligno (57155 inhabitants)
53 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)
85 Km SW of Ancona (100861 inhabitants)
95 Km NE of Viterbo (67173 inhabitants)
99 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 1.0 2021-03-27
03:34:18		 42.9505 13.0167 13 2021-07-12
16:55:05		 Bollettino Sismico Italiano INGV 89038561
Reviewed
Rev100 		ML 1.0 2021-03-27
03:34:18		 42.9487 13.0168 13 2021-03-27
03:38:37		 Sala Sismica INGV-Roma 88505761
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-03-27 03:34:18 ± 0.05
Latitude 42.9505 ± 0.0027
Longitude 13.0167 ± 0.0037
Depth (km) 13 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 89038561

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 320
Semi-minor axis of confidence ellipse (meter) 140
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 213
Circular confidence region, given by single value of horizontal uncertainty (meter) 320.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 50
Number of associated phases, regardless of their use for origin computation 25
Number of defining phases 25
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) 0.02698
Epicentral distance of station farthest from the epicenter (degree) 0.35883
Number of stations at which the event was observed 13
Number of stations from which data was used for origin computation 13
Magnitudes information

ML:1.0

Field Value
Value 1.0
Uncertainty 0.1
Num. used stations 6
Type of magnitude ML
Reference to an origin 89038561
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-07-07 08:31:39

ML:1.0

Field Value
Value 1.0
Uncertainty 0.1
Num. used stations 6
Type of magnitude ML
Reference to an origin 88505761
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-03-27 03:38:37
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.GUMA.HHZ. 2021-03-27T03:34:28.68 0.3 undecidable manual S 64 28.6491 95 0.34 69
IV.GAVE.EHZ. 2021-03-27T03:34:28.84 0.3 undecidable manual S 199 30.3474 95 0.06 73
IV.ASSB.HHZ. 2021-03-27T03:34:28.75 0.3 undecidable manual S 290 30.747 94 -0.15 71
IV.MMO1.EHZ. 2021-03-27T03:34:27.49 0.3 undecidable manual S 103 25.8519 96 -0.09 73
IV.CSP1.EHZ. 2021-03-27T03:34:26.29 0.3 undecidable manual S 44 21.867 99 -0.24 71
IV.MOMA.HNZ. 2021-03-27T03:34:26.10 0.1 undecidable manual P 246 39.8268 93 0.34 90
IV.MML1.HNZ. 2021-03-27T03:34:25.57 0.6 undecidable manual S 349 18.4704 103 -0.06 50
IV.ASSB.HHZ. 2021-03-27T03:34:24.13 0.3 undecidable manual P 290 30.747 94 -0.25 70
IV.GUMA.HHZ. 2021-03-27T03:34:24.27 0.1 undecidable manual P 64 28.6491 95 0.21 94
IV.NRCA.HHZ. 2021-03-27T03:34:24.44 0.3 undecidable manual S 149 15.1737 110 -0.36 70
IV.MC2.EHZ. 2021-03-27T03:34:24.81 0.6 undecidable manual S 107 14.6742 112 0.14 49
IV.GAVE.EHZ. 2021-03-27T03:34:24.20 0.3 undecidable manual P 199 30.3474 95 -0.11 72
IV.FDMO.HHZ. 2021-03-27T03:34:23.64 0.3 undecidable manual S 31 11.0778 124 -0.2 74
IV.CESI.HHZ. 2021-03-27T03:34:23.78 0.3 undecidable manual S 304 10.878 125 -0.01 76
IV.MMO1.EHZ. 2021-03-27T03:34:23.65 0.3 undecidable manual P 103 25.8519 96 0.03 74
IV.FEMA.HNZ. 2021-03-27T03:34:22.63 0.3 undecidable manual S 64 2.997 163 0.09 75
IV.CSP1.EHZ. 2021-03-27T03:34:22.80 0.3 undecidable manual P 44 21.867 99 -0.22 72
IT.MTCL.HGZ. 2021-03-27T03:34:22.39 0.3 undecidable manual S 344 4.995 152 -0.36 72
IV.MML1.HNZ. 2021-03-27T03:34:22.59 0.1 undecidable manual P 349 18.4704 103 0.09 98
IV.MC2.EHZ. 2021-03-27T03:34:21.88 0.3 undecidable manual P 107 14.6742 112 -0.06 75
IV.FDMO.HHZ. 2021-03-27T03:34:21.60 0.3 positive manual P 31 11.0778 124 0.14 74
IV.CESI.HHZ. 2021-03-27T03:34:21.63 0.1 negative manual P 304 10.878 125 0.2 97
IV.NRCA.HHZ. 2021-03-27T03:34:21.99 0.1 positive manual P 149 15.1737 110 -0.03 100
IV.FEMA.HNZ. 2021-03-27T03:34:20.87 0.3 undecidable manual P 64 2.997 163 0.16 74
IT.MTCL.HGZ. 2021-03-27T03:34:20.84 0.3 undecidable manual P 344 4.995 152 0.01 77
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FDMO.HHN. ML:0.9 0.0000908 0.2 AML other m 2021-03-27T03:34:23.88
IV.CESI.HHE. ML:1.0 0.00011030000000000001 0.16 AML other m 2021-03-27T03:34:23.88
IV.CESI.HHN. ML:1.1 0.00011949999999999999 1.76 AML other m 2021-03-27T03:34:24.90
IV.FDMO.HHE. ML:1.1 0.0001211 0.88 AML other m 2021-03-27T03:34:24.87
IV.NRCA.HHN. ML:1.0 0.00008355000000000001 0.12 AML other m 2021-03-27T03:34:24.63
IV.NRCA.HHE. ML:0.9 0.00006709999999999999 0.6 AML other m 2021-03-27T03:34:25.38
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