Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.6 on date 25-11-2020 and time 01:20:10 (Italy) in region 4 km W Visso (MC)

A magnitude ML 1.6 earthquake occured in region: 4 km W Visso (MC), on

  • 25-11-2020 00:20:10 (UTC)
  • 25-11-2020 01:20:10 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.92, 13.05 at 7 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 5 724 1831
Ussita MC 8 444 2275
Monte Cavallo MC 9 145 2420
Castelsantangelo sul Nera MC 9 281 2701
Sellano PG 10 1079 3780
Fiordimonte MC 13 202 3982
Pieve Torina MC 13 1458 5440
Norcia PG 15 4957 10397
Fiastra MC 15 559 10956
Cerreto di Spoleto PG 16 1075 12031
Pievebovigliana MC 16 866 12897
Acquacanina MC 16 121 13018
Bolognola MC 17 142 13160
Muccia MC 18 915 14075
Serravalle di Chienti MC 18 1070 15145

Municipalities with at least 50000 inhabitants

An earthquake occurred to
28 Km E of Foligno (57155 inhabitants)
52 Km NE of Terni (111501 inhabitants)
57 Km E of Perugia (166134 inhabitants)
61 Km W of Teramo (54892 inhabitants)
70 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
The earthquake effects in MCS scale as obtained from the compiled questionnaire

The earthquake effects in MCS scale as obtained from the compiled questionnaire

This map shows the distribution of the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire (http://www.haisentitoilterremoto.it/) that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100 		ML 1.6 2020-11-25
00:20:10		 42.93 13.05 7 2020-11-25
00:32:25		 Sala Sismica INGV-Roma 84995001
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-11-25 00:20:10 ± 0.05
Latitude 42.93 ± 0.00
Longitude 13.05 ± 0.00
Depth (km) 7 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 84995001

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 245
Semi-minor axis of confidence ellipse (meter) 218
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 57
Circular confidence region, given by single value of horizontal uncertainty (meter) 250
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 46
Number of associated phases, regardless of their use for origin computation 54
Number of defining phases 54
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.28
Epicentral distance of station closest to the epicenter (degree) 0.03687
Epicentral distance of station farthest from the epicenter (degree) 0.65201
Number of stations at which the event was observed 28
Number of stations from which data was used for origin computation 28
Magnitude information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.2
Num. used stations 34
Type of magnitude ML
Reference to an origin 84995001
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-11-25 00:32:25
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.ARVD.HHZ. 2020-11-25T00:20:31.20 0.3 undecidable manual S 353 0.5774 50 0.42 63
IV.SSFR.HHZ. 2020-11-25T00:20:29.97 0.3 undecidable manual S 340 0.5459 50 0.14 67
IV.TERO.HHZ. 2020-11-25T00:20:28.37 0.6 undecidable manual S 126 0.509 50 -0.37 43
IV.CESX.HHZ. 2020-11-25T00:20:27.47 0.3 undecidable manual S 227 0.4623 50 0.12 68
IV.ATCC.EHZ. 2020-11-25T00:20:25.61 0.3 undecidable manual S 311 0.3939 50 0.27 67
IV.MOMA.HHZ. 2020-11-25T00:20:25.52 0.3 undecidable manual S 251 0.3687 50 0.93 54
IV.EL6.EHZ. 2020-11-25T00:20:25.31 0.6 undecidable manual S 6 0.4065 50 -0.39 44
IV.SMA1.EHZ. 2020-11-25T00:20:24.31 0.3 undecidable manual S 144 0.3633 50 -0.11 70
IV.MF5.EHZ. 2020-11-25T00:20:23.20 0.3 undecidable manual S 78 0.3094 102 0.64 62
IV.T1299.HNE. 2020-11-25T00:20:23.66 0.3 undecidable manual S 149 0.3381 101 0 72
IV.SNTG.HHZ. 2020-11-25T00:20:23.72 0.3 undecidable manual S 347 0.3381 101 0.05 71
IV.ATVO.HHZ. 2020-11-25T00:20:23.35 0.3 undecidable manual P 315 0.652 50 -0.09 66
IV.SAP2.EHZ. 2020-11-25T00:20:22.99 0.3 undecidable manual S 56 0.3103 102 0.4 67
IV.MTRA.HNN. 2020-11-25T00:20:22.15 0.3 undecidable manual S 123 0.3076 102 -0.34 67
IV.ASSB.HHZ. 2020-11-25T00:20:22.41 0.3 undecidable manual S 293 0.3067 102 -0.03 72
IV.LNSS.HHZ. 2020-11-25T00:20:22.91 0.3 undecidable manual S 181 0.322 102 -0.13 70
IV.SSFR.HHZ. 2020-11-25T00:20:21.53 0.1 undecidable manual P 340 0.5459 50 -0.08 90
IV.ARVD.HHZ. 2020-11-25T00:20:21.84 0.1 undecidable manual P 353 0.5774 50 -0.32 86
IV.MNTT.EHZ. 2020-11-25T00:20:20.02 0.1 undecidable manual P 71 0.4245 50 0.48 85
IV.CESX.HHZ. 2020-11-25T00:20:20.08 0.1 undecidable manual P 227 0.4623 50 -0.1 92
IV.TERO.HHZ. 2020-11-25T00:20:20.48 0.1 undecidable manual P 126 0.509 50 -0.5 83
IV.GUMA.HHZ. 2020-11-25T00:20:20.87 0.3 undecidable manual S 57 0.2527 105 0.44 67
IV.PF6.EHE. 2020-11-25T00:20:19.69 0.3 undecidable manual S 27 0.2392 105 -0.24 70
IV.SMA1.EHZ. 2020-11-25T00:20:18.17 0.1 undecidable manual P 144 0.3633 50 -0.31 89
IV.MML1.HNE. 2020-11-25T00:20:18.59 0.3 undecidable manual S 344 0.1961 109 0.25 70
IV.CSP1.EHZ. 2020-11-25T00:20:18.45 0.3 undecidable manual S 35 0.2032 108 -0.17 71
IV.EL6.EHZ. 2020-11-25T00:20:18.72 0.1 undecidable manual P 6 0.4065 50 -0.5 85
IV.MMO1.EHZ. 2020-11-25T00:20:18.63 0.3 undecidable manual S 97 0.2077 108 -0.14 72
IV.ATCC.EHZ. 2020-11-25T00:20:18.81 0.1 undecidable manual P 311 0.3939 50 -0.21 91
IV.MOMA.HHZ. 2020-11-25T00:20:18.79 0.1 undecidable manual P 251 0.3687 50 0.21 91
IV.MTRA.HNN. 2020-11-25T00:20:17.03 0.1 undecidable manual P 123 0.3076 102 -0.34 90
IV.ASSB.HHZ. 2020-11-25T00:20:17.18 0.1 undecidable manual P 293 0.3067 102 -0.16 93
IV.LNSS.HHZ. 2020-11-25T00:20:17.46 0.1 undecidable manual P 181 0.322 102 -0.23 92
IV.SAP2.EHZ. 2020-11-25T00:20:17.74 0.1 undecidable manual P 56 0.3103 102 0.31 90
IV.MF5.EHZ. 2020-11-25T00:20:17.63 0.1 undecidable manual P 78 0.3094 102 0.22 92
IV.T1299.HNE. 2020-11-25T00:20:17.99 0.1 undecidable manual P 149 0.3381 101 -0.06 95
IV.SNTG.HHZ. 2020-11-25T00:20:17.86 0.1 undecidable manual P 347 0.3381 101 -0.19 92
IV.GUMA.HHZ. 2020-11-25T00:20:16.37 0.1 undecidable manual P 57 0.2527 105 0.19 94
IV.CESI.HHZ. 2020-11-25T00:20:16.41 0.3 undecidable manual S 308 0.1304 117 0.4 69
IV.FDMO.HHZ. 2020-11-25T00:20:15.26 0.3 undecidable manual S 15 0.1151 120 -0.25 71
IV.PF6.EHE. 2020-11-25T00:20:15.58 0.1 undecidable manual P 27 0.2392 105 -0.31 92
IV.MC2.EHZ. 2020-11-25T00:20:15.62 0.3 undecidable manual S 97 0.1061 122 0.43 69
IV.CSP1.EHZ. 2020-11-25T00:20:15.05 0.1 undecidable manual P 35 0.2032 108 -0.08 97
IV.NRCA.HNZ. 2020-11-25T00:20:15.51 0.3 undecidable manual S 151 0.1043 122 0.38 70
IV.MMO1.EHZ. 2020-11-25T00:20:15.18 0.1 undecidable manual P 97 0.2077 108 -0.04 98
IV.CESI.HHZ. 2020-11-25T00:20:14.01 0.1 undecidable manual P 308 0.1304 117 0.38 92
IV.MML1.HNE. 2020-11-25T00:20:14.87 0.1 undecidable manual P 344 0.1961 109 -0.11 96
IT.MTCL.HGZ. 2020-11-25T00:20:14.03 0.3 undecidable manual S 334 0.0764 131 -0.25 72
IV.NRCA.HNZ. 2020-11-25T00:20:13.46 0.1 undecidable manual P 151 0.1043 122 0.34 94
IV.FDMO.HHZ. 2020-11-25T00:20:13.32 0.1 undecidable manual P 15 0.1151 120 -0.02 100
IV.MC2.EHZ. 2020-11-25T00:20:13.38 0.1 undecidable manual P 97 0.1061 122 0.23 96
IT.MTCL.HGZ. 2020-11-25T00:20:12.67 0.1 undecidable manual P 334 0.0764 131 0.04 100
IV.FEMA.HNZ. 2020-11-25T00:20:12.58 0.3 undecidable manual S 5 0.0369 151 -0.72 63
IV.FEMA.HNZ. 2020-11-25T00:20:11.93 0.1 undecidable manual P 5 0.0369 151 -0.14 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FDMO.HHN. ML:1.6 0.000504 0.22 AML other m 2020-11-25T00:20:15.51
IV.NRCA.HHE. ML:1.8 0.0007515 0.58 AML other m 2020-11-25T00:20:15.94
IV.NRCA.HHN. ML:1.7 0.0007265 0.96 AML other m 2020-11-25T00:20:15.66
IV.FDMO.HHE. ML:1.6 0.0005005 0.18 AML other m 2020-11-25T00:20:15.69
IV.NRCA.HNN. ML:1.7 0.0007035 1.54 AML other m 2020-11-25T00:20:16.12
IV.NRCA.HNE. ML:1.7 0.0007055 1.2 AML other m 2020-11-25T00:20:16.94
IV.CESI.HHE. ML:1.4 0.0003055 0.54 AML other m 2020-11-25T00:20:18.24
IV.CESI.HHN. ML:1.6 0.000401 0.36 AML other m 2020-11-25T00:20:18.51
IV.CSP1.EHE. ML:1.9 0.000554 0.78 AML other m 2020-11-25T00:20:19.62
IV.CSP1.EHN. ML:1.9 0.000558 0.96 AML other m 2020-11-25T00:20:19.14
IV.GUMA.HHN. ML:2.5 0.001645 0.2 AML other m 2020-11-25T00:20:21.27
IV.GUMA.HHE. ML:2.2 0.000758 1.22 AML other m 2020-11-25T00:20:22.32
IV.LNSS.HHN. ML:1.6 0.000143 0.4 AML other m 2020-11-25T00:20:23.30
IV.MF5.EHN. ML:1.4 0.0001054 0.64 AML other m 2020-11-25T00:20:23.57
IV.MF5.EHE. ML:1.6 0.00017826 0.4 AML other m 2020-11-25T00:20:23.58
IV.ASSB.HHE. ML:1.4 0.0001206 1.72 AML other m 2020-11-25T00:20:23.09
IV.SNTG.HHE. ML:1.1 5.145E-5 0.72 AML other m 2020-11-25T00:20:24.16
IV.ASSB.HHN. ML:1.5 0.000143 0.42 AML other m 2020-11-25T00:20:25.35
IV.LNSS.HHE. ML:1.6 0.00014375 0.36 AML other m 2020-11-25T00:20:25.40
IV.SNTG.HHN. ML:1.2 6.61E-5 0.72 AML other m 2020-11-25T00:20:25.13
IV.SMA1.EHE. ML:1.4 9.625E-5 0.54 AML other m 2020-11-25T00:20:26.72
IV.MOMA.HHE. ML:1.3 6.26E-5 0.24 AML other m 2020-11-25T00:20:27.07
IV.MOMA.HHN. ML:1.3 6.595E-5 0.14 AML other m 2020-11-25T00:20:27.13
IV.ATCC.EHN. ML:1.6 0.00013245 0.34 AML other m 2020-11-25T00:20:28.66
IV.CESX.HHE. ML:1.4 5.895E-5 0.62 AML other m 2020-11-25T00:20:28.40
IV.TERO.HHE. ML:1.2 3.92E-5 1 AML other m 2020-11-25T00:20:28.43
IV.TERO.HHN. ML:1.2 4.175E-5 1.12 AML other m 2020-11-25T00:20:29.04
IV.MNTT.EHN. ML:1.8 0.0001965 0.88 AML other m 2020-11-25T00:20:29.25
IV.CESX.HHN. ML:1.5 7.525E-5 0.5 AML other m 2020-11-25T00:20:29.21
IV.ATCC.EHE. ML:1.5 8.95E-5 0.52 AML other m 2020-11-25T00:20:29.55
IV.SMA1.EHN. ML:1.2 5.945E-5 0.58 AML other m 2020-11-25T00:20:30.75
IV.SSFR.HHN. ML:1.6 8.67E-5 1.36 AML other m 2020-11-25T00:20:32.07
IV.SSFR.HHE. ML:1.8 0.0001145 0.24 AML other m 2020-11-25T00:20:33.18
IV.MNTT.EHE. ML:1.9 0.0002215 0.78 AML other m 2020-11-25T00:20:33.83
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download