Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.4 on date 21-11-2021 and time 15:23:31 (UTC) in region 5 km S Monte Cavallo (MC)

A magnitude ML 0.4 earthquake occured in region: 5 km S Monte Cavallo (MC), on

  • 21-11-2021 15:23:31 (UTC)
  • 21-11-2021 16:23:31 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.9470, 12.9890 at 11 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 5 145 145
Sellano PG 8 1079 1224
Visso MC 8 1107 2331
Preci PG 9 724 3055
Pieve Torina MC 12 1458 4513
Ussita MC 12 444 4957
Fiordimonte MC 13 202 5159
Serravalle di Chienti MC 14 1070 6229
Castelsantangelo sul Nera MC 15 281 6510
Pievebovigliana MC 15 866 7376
Cerreto di Spoleto PG 15 1075 8451
Muccia MC 16 915 9366
Fiastra MC 17 559 9925
Acquacanina MC 18 121 10046
Norcia PG 19 4957 15003

Municipalities with at least 50000 inhabitants

An earthquake occurred to
23 Km E of Foligno (57155 inhabitants)
51 Km NE of Terni (111501 inhabitants)
52 Km E of Perugia (166134 inhabitants)
67 Km W of Teramo (54892 inhabitants)
74 Km NW of L'Aquila (69753 inhabitants)
86 Km SW of Ancona (100861 inhabitants)
93 Km NE of Viterbo (67173 inhabitants)
100 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 0.4 2021-11-21
15:23:31		 42.947 12.9893 11 2021-11-21
15:42:57		 Sala Sismica INGV-Roma 97660681
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-11-21 15:23:31 ± 0.06
Latitude 42.9470 ± 0.0036
Longitude 12.9893 ± 0.0025
Depth (km) 11 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 97660681

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 367
Semi-minor axis of confidence ellipse (meter) 190
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 183
Circular confidence region, given by single value of horizontal uncertainty (meter) 370.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 242
Number of associated phases, regardless of their use for origin computation 46
Number of defining phases 10
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.05
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.21404
Number of stations at which the event was observed 38
Number of stations from which data was used for origin computation 5
Magnitude information

ML:0.4

Field Value
Value 0.4
Uncertainty 0.1
Num. used stations 4
Type of magnitude ML
Reference to an origin 97660681
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-11-21 15:42:57
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MUCR.HHZ. 2021-11-21T15:25:10.96 3.0 undecidable manual Sn -9.99 0
IV.QLNO.HHZ. 2021-11-21T15:25:01.62 3.0 undecidable manual Sn 2.13 0
IV.MNTV.EHZ. 2021-11-21T15:24:57.94 3.0 undecidable manual Sg 21.110001 0
IV.VOBA.EHZ. 2021-11-21T15:24:48.37 3.0 undecidable manual Sn -0.21 0
TV.GMB1.HHZ. 2021-11-21T15:24:46.36 3.0 positive manual Pg 18.200001 0
IV.CMPR.HHZ. 2021-11-21T15:24:44.84 3.0 undecidable manual Sg 7.9 0
FR.SAOF.HHZ.00 2021-11-21T15:24:43.58 3.0 positive manual Pg 24.59 0
CR.STON.BHZ. 2021-11-21T15:24:43.14 3.0 undecidable manual Sn 0.12 0
IV.STAL.HHZ. 2021-11-21T15:24:42.91 3.0 undecidable manual Sn -5.19 0
MN.CLTB.HHZ. 2021-11-21T15:24:39.84 3.0 undecidable manual Pg 8.62 0
IV.VARE.HHZ. 2021-11-21T15:24:37.10 3.0 positive manual Pg 17.040001 0
IV.MTGR.HHZ. 2021-11-21T15:24:37.43 3.0 negative manual Pg 10.18 0
IV.CMDO.HHZ. 2021-11-21T15:24:36.60 3.0 positive manual Pn 3.69 0
IV.SCIAC.HHZ. 2021-11-21T15:24:32.99 3.0 negative manual Pn 0.91 0
IV.IMOL.HNZ. 2021-11-21T15:24:30.06 3.0 undecidable manual Sg 16.02 0
IV.MTMR.EHZ. 2021-11-21T15:24:30.01 3.0 undecidable manual Sg 7.17 0
IV.ESCV.HHZ. 2021-11-21T15:24:28.02 3.0 negative manual Pn -2.57 0
IV.BAG8.EHZ. 2021-11-21T15:24:19.36 3.0 undecidable manual Pn 10.39 0
IV.ZEN8.EHZ. 2021-11-21T15:24:14.89 3.0 undecidable manual Pn 9.3 0
IV.VOBA.EHZ. 2021-11-21T15:24:11.00 3.0 negative manual Pn 4.13 0
IV.COR1.EHZ. 2021-11-21T15:24:02.26 3.0 undecidable manual Sg 7.53 0
IV.RNI2.HHZ. 2021-11-21T15:24:02.94 3.0 undecidable manual Sg 0.29 0
IV.CMPR.HHZ. 2021-11-21T15:24:00.68 3.0 undecidable manual Pn 0.35 0
GU.GSCL.HHZ. 2021-11-21T15:23:57.93 3.0 negative manual Pn 3.24 0
IV.GAVE.EHZ. 2021-11-21T15:23:52.50 3.0 undecidable manual Sg 2.27 0
IV.LRP.EHZ. 2021-11-21T15:23:51.98 3.0 undecidable manual Sn -9.3 0
IV.ARVD.HHZ. 2021-11-21T15:23:51.89 3.0 undecidable manual Sn -1.45 0
IV.RM33.HNZ. 2021-11-21T15:23:49.09 3.0 undecidable manual Sg -1.1 0
IV.COLB.HHZ. 2021-11-21T15:23:48.72 3.0 undecidable manual Pn -1.56 0
OT.OT17.EHZ. 2021-11-21T15:23:47.70 3.0 negative manual Pn 0.03 0
IV.BRSN.EHZ. 2021-11-21T15:23:44.49 3.0 undecidable manual Pn -0.66 0
IV.CSP1.EHZ. 2021-11-21T15:23:40.81 0.3 undecidable manual S 47 23.754 50 0.03 72
IV.FOSV.EHZ. 2021-11-21T15:23:39.24 3.0 undecidable manual Pn 3.99 0
IV.FDMO.HHZ. 2021-11-21T15:23:37.67 0.6 undecidable manual S 39 12.6762 130 0 49
IV.FEMA.HNE. 2021-11-21T15:23:36.05 0.6 undecidable manual S 71 5.1948 154 0.03 50
IV.RMP.HHZ. 2021-11-21T15:23:36.14 3.0 positive manual Pn -3.42 0
IV.CESI.HHZ. 2021-11-21T15:23:36.90 0.3 undecidable manual S 313 9.3795 139 0.05 74
IV.CSP1.EHZ. 2021-11-21T15:23:36.94 0.6 negative manual P 47 23.754 50 -0.08 48
IV.FDMO.HHZ. 2021-11-21T15:23:35.30 1.0 undecidable manual P 39 12.6762 130 0.07 24
IT.MTCL.HGE. 2021-11-21T15:23:35.92 0.6 undecidable manual S 9 5.2947 154 -0.12 49
IV.TERO.HHZ. 2021-11-21T15:23:35.31 3.0 undecidable manual P 1.45 0
IV.CESI.HHZ. 2021-11-21T15:23:34.73 0.1 undecidable manual P 313 9.3795 139 -0.02 99
IV.FEMA.HNE. 2021-11-21T15:23:34.30 0.1 undecidable manual P 71 5.1948 154 0.02 100
IT.MTCL.HGE. 2021-11-21T15:23:34.28 0.1 undecidable manual P 9 5.2947 154 -0.01 100
IV.RM33.HNZ. 2021-11-21T15:23:33.05 3.0 undecidable manual P -1.02 0
IV.MNTT.EHZ. 2021-11-21T15:23:32.92 3.0 negative manual P -0.83 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CESI.HHN. ML:0.4 0.00003145 0.2 AML other m 2021-11-21T15:23:37.12
IV.CESI.HHE. ML:0.2 0.0000203 0.2 AML other m 2021-11-21T15:23:37.23
IV.FDMO.HHN. ML:0.5 0.000029450835000000002 0.1792 AML other m 2021-11-21T15:23:37.91
IV.FDMO.HHE. ML:0.5 0.000030597185000000005 0.1792 AML other m 2021-11-21T15:23:37.89
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