Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.4 on date 23-11-2020 and time 10:22:34 (Italy) in region 4 km W Visso (MC)

A magnitude ML 1.4 earthquake occured in region: 4 km W Visso (MC), on

  • 23-11-2020 09:22:34 (UTC)
  • 23-11-2020 10:22:34 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.9320, 13.0380 at 8 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
Visso MC 4 1107 1107
Preci PG 6 724 1831
Monte Cavallo MC 8 145 1976
Ussita MC 8 444 2420
Sellano PG 10 1079 3499
Castelsantangelo sul Nera MC 10 281 3780
Fiordimonte MC 13 202 3982
Pieve Torina MC 13 1458 5440
Pievebovigliana MC 15 866 6306
Fiastra MC 15 559 6865
Acquacanina MC 16 121 6986
Cerreto di Spoleto PG 16 1075 8061
Norcia PG 16 4957 13018
Muccia MC 17 915 13933
Bolognola MC 17 142 14075
Serravalle di Chienti MC 17 1070 15145

Municipalities with at least 50000 inhabitants

An earthquake occurred to
27 Km E of Foligno (57155 inhabitants)
52 Km NE of Terni (111501 inhabitants)
56 Km E of Perugia (166134 inhabitants)
62 Km W of Teramo (54892 inhabitants)
71 Km NW of L'Aquila (69753 inhabitants)
86 Km SW of Ancona (100861 inhabitants)
95 Km NE of Viterbo (67173 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 1.4 2020-11-23
09:22:34		 42.9322 13.0378 8 2020-11-23
09:28:34		 Sala Sismica INGV-Roma 84963081
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-11-23 09:22:34 ± 0.08
Latitude 42.9322 ± 0.0036
Longitude 13.0378 ± 0.0049
Depth (km) 8 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 84963081

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 395
Semi-minor axis of confidence ellipse (meter) 101
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 48
Circular confidence region, given by single value of horizontal uncertainty (meter) 400.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 112
Number of associated phases, regardless of their use for origin computation 30
Number of defining phases 30
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.23
Epicentral distance of station closest to the epicenter (degree) 0.03148
Epicentral distance of station farthest from the epicenter (degree) 0.39930
Number of stations at which the event was observed 16
Number of stations from which data was used for origin computation 16
Magnitude information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.3
Num. used stations 20
Type of magnitude ML
Reference to an origin 84963081
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-11-23 09:28:34
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.EL6.EHZ. 2020-11-23T09:22:49.68 0.3 undecidable manual S 7 44.3223 50 -0.2 68
IV.SNTG.HHZ. 2020-11-23T09:22:48.10 0.6 undecidable manual S 348 36.6411 102 0.29 45
IV.MF5.EHZ. 2020-11-23T09:22:47.90 0.6 undecidable manual S 80 34.8429 102 0.73 40
IV.LNSS.HHZ. 2020-11-23T09:22:47.51 0.6 undecidable manual S 180 36.5412 102 -0.24 46
IV.ASSB.HHZ. 2020-11-23T09:22:46.65 0.6 undecidable manual S 292 33.1446 103 0.05 48
IV.GUMA.HHZ. 2020-11-23T09:22:45.43 0.6 undecidable manual S 59 28.1496 105 0.51 44
IV.PF6.EHZ. 2020-11-23T09:22:44.00 0.3 undecidable manual S 29 26.1516 106 -0.25 70
IV.EL6.EHZ. 2020-11-23T09:22:43.16 0.1 undecidable manual P 7 44.3223 50 -0.35 88
IV.MMO1.EHZ. 2020-11-23T09:22:43.22 0.6 undecidable manual S 99 23.754 108 -0.24 47
IV.SNTG.HHZ. 2020-11-23T09:22:42.43 0.6 negative manual P 348 36.6411 102 0.12 47
IV.CSP1.EHZ. 2020-11-23T09:22:42.86 0.6 undecidable manual S 37 22.2555 109 -0.12 48
IV.MF5.EHZ. 2020-11-23T09:22:42.02 0.1 undecidable manual P 80 34.8429 102 0.08 95
IV.LNSS.HHZ. 2020-11-23T09:22:42.01 0.6 positive manual P 180 36.5412 102 -0.27 45
IV.ASSB.HHZ. 2020-11-23T09:22:41.51 0.1 undecidable manual P 292 33.1446 103 -0.1 95
IV.CESI.HHZ. 2020-11-23T09:22:40.65 0.6 undecidable manual S 307 13.4754 119 0.46 45
IV.GUMA.HHZ. 2020-11-23T09:22:40.79 0.1 negative manual P 59 28.1496 105 0.14 95
IV.PF6.EHZ. 2020-11-23T09:22:40.40 0.1 undecidable manual P 29 26.1516 106 0.14 95
IV.NRCA.HHZ. 2020-11-23T09:22:40.08 0.6 undecidable manual S 150 12.5763 121 0.17 48
IV.CSP1.EHZ. 2020-11-23T09:22:39.44 0.6 positive manual P 37 22.2555 109 -0.09 48
IV.FDMO.HHZ. 2020-11-23T09:22:39.57 0.6 undecidable manual S 19 12.2766 122 -0.24 48
IV.MMO1.EHZ. 2020-11-23T09:22:39.61 0.3 positive manual P 99 23.754 108 -0.19 71
IV.MML1.HNZ. 2020-11-23T09:22:39.45 0.1 undecidable manual P 345 20.868 110 0.2 95
IV.CESI.HHZ. 2020-11-23T09:22:38.26 0.1 positive manual P 307 13.4754 119 0.35 93
IT.MTCL.HGZ. 2020-11-23T09:22:38.26 0.6 undecidable manual S 336 7.4814 135 -0.26 48
IT.MTCL.HGZ. 2020-11-23T09:22:37.00 0.1 positive manual P 336 7.4814 135 0.05 100
IV.NRCA.HHZ. 2020-11-23T09:22:37.89 0.1 negative manual P 150 12.5763 121 0.14 97
IV.FDMO.HHZ. 2020-11-23T09:22:37.67 0.3 positive manual P 19 12.2766 122 -0.03 75
IV.MC2.EHZ. 2020-11-23T09:22:37.82 0.1 positive manual P 101 12.4764 121 0.08 98
IV.FEMA.HNZ. 2020-11-23T09:22:36.84 0.6 undecidable manual S 16 3.4965 155 -0.87 39
IV.FEMA.HNZ. 2020-11-23T09:22:36.24 0.1 negative manual P 16 3.4965 155 -0.24 97
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FDMO.HHE. ML:1.3 0.00027649999999999994 0.26 AML other m 2020-11-23T09:22:39.87
IV.FDMO.HHN. ML:1.3 0.00026700000000000004 0.2 AML other m 2020-11-23T09:22:40.14
IV.NRCA.HHN. ML:1.7 0.0005669999999999999 0.14 AML other m 2020-11-23T09:22:40.32
IV.CESI.HHN. ML:1.5 0.000377 0.34 AML other m 2020-11-23T09:22:40.89
IV.NRCA.HHE. ML:1.8 0.000734 1.88 AML other m 2020-11-23T09:22:40.98
IV.CESI.HHE. ML:1.3 0.000227 0.54 AML other m 2020-11-23T09:22:42.52
IV.CSP1.EHE. ML:1.7 0.0003445 1.28 AML other m 2020-11-23T09:22:43.93
IV.GUMA.HHN. ML:2.0 0.0006215 0.2 AML other m 2020-11-23T09:22:45.66
IV.GUMA.HHE. ML:1.9 0.0003975 0.56 AML other m 2020-11-23T09:22:45.59
IV.ASSB.HHE. ML:1.4 0.000127 1.54 AML other m 2020-11-23T09:22:46.11
IV.CSP1.EHN. ML:1.6 0.00027249999999999996 0.42 AML other m 2020-11-23T09:22:47.30
IV.LNSS.HHE. ML:1.3 0.0000743 0.14 AML other m 2020-11-23T09:22:48.09
IV.LNSS.HHN. ML:1.2 0.000072 0.76 AML other m 2020-11-23T09:22:48.23
IV.SNTG.HHE. ML:1.0 0.0000347 0.52 AML other m 2020-11-23T09:22:49.60
IV.ASSB.HHN. ML:1.4 0.00011485000000000001 0.82 AML other m 2020-11-23T09:22:49.53
IV.SNTG.HHN. ML:1.0 0.00003455 0.12 AML other m 2020-11-23T09:22:49.68
IV.EL6.EHN. ML:1.4 0.000084 1.4 AML other m 2020-11-23T09:22:51.72
IV.EL6.EHE. ML:1.4 0.0000859 0.22 AML other m 2020-11-23T09:22:51.90
IV.FEMA.HNE. ML:0.0 0.004008704500000001 0.096 AML other m 2020-11-23T09:22:37.14
IV.FEMA.HNN. ML:0.0 0.0030616025000000002 0.0832 AML other m 2020-11-23T09:22:37.07
IV.MF5.EHE. ML:1.2 0.00006910593499999999 0.2176 AML other m 2020-11-23T09:22:48.33
IV.MF5.EHN. ML:1.1 0.000054871569999999996 0.3392 AML other m 2020-11-23T09:22:48.75
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