Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.6 on date 05-12-2020 and time 13:17:05 (Italy) in region 5 km W Visso (MC)

A magnitude ML 1.6 earthquake occured in region: 5 km W Visso (MC), on

  • 05-12-2020 12:17:05 (UTC)
  • 05-12-2020 13:17:05 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.95, 13.04 at 4 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 5 1107 1107
Monte Cavallo MC 5 145 1252
Preci PG 8 724 1976
Ussita MC 9 444 2420
Pieve Torina MC 10 1458 3878
Fiordimonte MC 10 202 4080
Sellano PG 11 1079 5159
Castelsantangelo sul Nera MC 12 281 5440
Pievebovigliana MC 13 866 6306
Fiastra MC 14 559 6865
Acquacanina MC 14 121 6986
Muccia MC 14 915 7901
Serravalle di Chienti MC 15 1070 8971
Bolognola MC 16 142 9113
Cerreto di Spoleto PG 18 1075 10188
Norcia PG 19 4957 15145

Municipalities with at least 50000 inhabitants

An earthquake occurred to
27 Km E of Foligno (57155 inhabitants)
54 Km NE of Terni (111501 inhabitants)
55 Km E of Perugia (166134 inhabitants)
64 Km NW of Teramo (54892 inhabitants)
73 Km NW of L'Aquila (69753 inhabitants)
84 Km SW of Ancona (100861 inhabitants)
97 Km NE of Viterbo (67173 inhabitants)
99 Km S of Fano (60888 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 2020-12-05
12:17:05		 42.95 13.03 4 2020-12-05
12:31:56		 Sala Sismica INGV-Roma 85215541
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-12-05 12:17:05 ± 0.12
Latitude 42.95 ± 0.00
Longitude 13.03 ± 0.00
Depth (km) 4 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 85215541

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 569
Semi-minor axis of confidence ellipse (meter) 72
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 211
Circular confidence region, given by single value of horizontal uncertainty (meter) 570
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 134
Number of associated phases, regardless of their use for origin computation 21
Number of defining phases 20
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.26
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.31296
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 10
Magnitude information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.2
Num. used stations 12
Type of magnitude ML
Reference to an origin 85215541
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-12-05 12:31:56
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.PE3.EHZ. 2020-12-05T12:17:35.97 3.0 undecidable manual S -0.03 0
IV.MF5.EHZ. 2020-12-05T12:17:18.08 0.6 undecidable manual S 84 0.313 96 0.63 41
IV.SNTG.HHZ. 2020-12-05T12:17:17.43 0.6 undecidable manual S 347 0.3085 96 0.15 47
IV.ASSB.HHZ. 2020-12-05T12:17:16.50 0.6 undecidable manual S 288 0.2887 97 -0.02 48
IV.MF5.EHZ. 2020-12-05T12:17:12.77 0.3 undecidable manual P 84 0.313 96 0.45 66
IV.CSP1.EHZ. 2020-12-05T12:17:12.52 0.6 undecidable manual S 42 0.1853 100 -0.07 49
IV.SNTG.HHZ. 2020-12-05T12:17:11.79 0.3 undecidable manual P 347 0.3085 96 -0.44 66
IV.ASSB.HHZ. 2020-12-05T12:17:11.39 0.1 undecidable manual P 288 0.2887 97 -0.4 89
IV.MC2.EHZ. 2020-12-05T12:17:10.31 0.6 undecidable manual S 111 0.1205 106 0.15 48
IV.CESI.HHZ. 2020-12-05T12:17:10.48 0.6 undecidable manual S 298 0.1079 107 0.8 40
IV.NRCA.HHZ. 2020-12-05T12:17:10.77 0.6 undecidable manual S 154 0.134 104 0.12 49
IV.FDMO.HHZ. 2020-12-05T12:17:09.10 0.6 undecidable manual S 25 0.0908 110 0.04 50
IV.CSP1.EHZ. 2020-12-05T12:17:09.29 0.1 undecidable manual P 42 0.1853 100 -0.23 94
IV.CESI.HHZ. 2020-12-05T12:17:08.13 0.1 positive manual P 298 0.1079 107 0.29 94
IV.NRCA.HHZ. 2020-12-05T12:17:08.23 0.3 undecidable manual P 154 0.134 104 -0.17 72
IV.FDMO.HHZ. 2020-12-05T12:17:07.38 0.1 undecidable manual P 25 0.0908 110 -0.11 98
IV.MC2.EHZ. 2020-12-05T12:17:07.98 0.1 undecidable manual P 111 0.1205 106 -0.14 97
IT.MTCL.HGZ. 2020-12-05T12:17:07.70 0.3 undecidable manual S 327 0.0477 126 0.13 74
IV.FEMA.HNZ. 2020-12-05T12:17:06.03 0.1 negative manual P 54 0.0135 158 -0.11 100
IT.MTCL.HGZ. 2020-12-05T12:17:06.69 0.1 undecidable manual P 327 0.0477 126 0.07 100
IV.FEMA.HNZ. 2020-12-05T12:17:06.47 0.6 undecidable manual S 54 0.0135 158 -0.27 48
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FDMO.HHN. ML:1.5 0.0005195 0.18 AML other m 2020-12-05T12:17:09.32
IV.FDMO.HHE. ML:1.6 0.000764 0.32 AML other m 2020-12-05T12:17:09.51
IV.CESI.HHN. ML:1.8 0.000881 0.22 AML other m 2020-12-05T12:17:10.90
IV.CESI.HNN. ML:1.7 0.0008145 0.22 AML other m 2020-12-05T12:17:10.90
IV.NRCA.HHE. ML:1.6 0.0005325 0.14 AML other m 2020-12-05T12:17:11.46
IV.NRCA.HHN. ML:1.8 0.000723 0.76 AML other m 2020-12-05T12:17:11.78
IV.CESI.HNE. ML:1.4 0.0003785 1.28 AML other m 2020-12-05T12:17:12.83
IV.CESI.HHE. ML:1.4 0.0003765 1.3 AML other m 2020-12-05T12:17:12.84
IV.CSP1.EHE. ML:1.8 0.0005395 1.24 AML other m 2020-12-05T12:17:13.32
IV.CSP1.EHN. ML:1.8 0.0005225 0.48 AML other m 2020-12-05T12:17:14.93
IV.ASSB.HHN. ML:1.6 0.000196 0.18 AML other m 2020-12-05T12:17:16.72
IV.ASSB.HHE. ML:1.6 0.0001805 0.34 AML other m 2020-12-05T12:17:16.96
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