Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.3 on date 30-11-2020 and time 01:34:34 (UTC) in region 2 km W Visso (MC)

A magnitude ML 1.3 earthquake occured in region: 2 km W Visso (MC), on

  • 30-11-2020 01:34:34 (UTC)
  • 30-11-2020 02:34:34 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.94, 13.07 at 10 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 2 1107 1107
Ussita MC 6 444 1551
Preci PG 7 724 2275
Castelsantangelo sul Nera MC 8 281 2556
Monte Cavallo MC 9 145 2701
Fiordimonte MC 11 202 2903
Pieve Torina MC 12 1458 4361
Sellano PG 13 1079 5440
Fiastra MC 13 559 5999
Acquacanina MC 13 121 6120
Pievebovigliana MC 14 866 6986
Bolognola MC 14 142 7128
Norcia PG 16 4957 12085
Muccia MC 16 915 13000
Serravalle di Chienti MC 18 1070 14070
Cerreto di Spoleto PG 18 1075 15145

Municipalities with at least 50000 inhabitants

An earthquake occurred to
30 Km E of Foligno (57155 inhabitants)
54 Km NE of Terni (111501 inhabitants)
59 Km E of Perugia (166134 inhabitants)
60 Km NW of Teramo (54892 inhabitants)
70 Km NW of L'Aquila (69753 inhabitants)
84 Km SW of Ancona (100861 inhabitants)
98 Km NE of Viterbo (67173 inhabitants)
100 Km W of Montesilvano (53738 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 1.3 2020-11-30
01:34:34		 42.94 13.07 10 2020-11-30
01:39:10		 Sala Sismica INGV-Roma 85098361
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-11-30 01:34:34 ± 0.12
Latitude 42.94 ± 0.01
Longitude 13.07 ± 0.01
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 85098361

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 544
Semi-minor axis of confidence ellipse (meter) 380
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 229
Circular confidence region, given by single value of horizontal uncertainty (meter) 540
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 135
Number of associated phases, regardless of their use for origin computation 20
Number of defining phases 19
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.25
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.3921
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:1.3

Field Value
Value 1.3
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 85098361
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-11-30 01:39:10
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.MF5.EHZ. 2020-11-30T01:34:46.70 0.3 undecidable manual S 80 0.2878 50 0.53 65
IV.TERO.HHZ. 2020-11-30T01:34:45.58 3.0 undecidable manual P 0.44 0
IV.CSP1.EHZ. 2020-11-30T01:34:42.50 0.3 undecidable manual S 32 0.1817 116 -0.14 73
IV.EL6.EHZ. 2020-11-30T01:34:42.84 0.6 negative manual P 3 0.3921 50 -0.34 45
IV.MMO1.EHZ. 2020-11-30T01:34:42.52 0.3 undecidable manual S 102 0.1898 115 -0.41 69
IV.CESI.HHZ. 2020-11-30T01:34:41.14 0.3 undecidable manual S 299 0.1394 122 -0.08 74
IV.MF5.EHZ. 2020-11-30T01:34:41.42 0.6 positive manual P 80 0.2878 50 0.02 49
IV.NRCA.HHZ. 2020-11-30T01:34:40.01 0.3 undecidable manual S 164 0.1088 129 -0.22 72
IV.CSP1.EHZ. 2020-11-30T01:34:39.19 0.1 positive manual P 32 0.1817 116 -0.17 96
IV.MMO1.EHZ. 2020-11-30T01:34:39.29 0.6 positive manual P 102 0.1898 115 -0.23 47
IV.MC2.EHZ. 2020-11-30T01:34:39.87 0.3 undecidable manual S 107 0.089 134 0.19 73
IV.FEMA.HNE. 2020-11-30T01:34:39.17 0.3 undecidable manual S 326 0.0297 161 0.76 63
IV.FDMO.HHZ. 2020-11-30T01:34:39.83 0.3 undecidable manual S 6 0.0989 131 -0.13 74
IT.MTCL.HGE. 2020-11-30T01:34:39.22 0.3 undecidable manual S 316 0.0773 138 -0.14 74
IV.CESI.HHZ. 2020-11-30T01:34:38.51 0.1 positive manual P 299 0.1394 122 -0.03 100
IV.MC2.EHZ. 2020-11-30T01:34:37.85 0.1 undecidable manual P 107 0.089 134 0.2 97
IV.FEMA.HNE. 2020-11-30T01:34:37.07 0.3 undecidable manual P 326 0.0297 161 0.15 75
IV.FDMO.HHZ. 2020-11-30T01:34:37.87 0.3 positive manual P 6 0.0989 131 0.06 75
IT.MTCL.HGE. 2020-11-30T01:34:37.44 0.3 undecidable manual P 316 0.0773 138 -0.02 76
IV.NRCA.HHZ. 2020-11-30T01:34:37.88 0.3 positive manual P 164 0.1088 129 -0.09 75
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FDMO.HHN. ML:1.3 0.000255 0.62 AML other m 2020-11-30T01:34:40.37
IV.NRCA.HHN. ML:1.2 0.000191 0.14 AML other m 2020-11-30T01:34:40.06
IV.FDMO.HHE. ML:1.3 0.0002405 0.58 AML other m 2020-11-30T01:34:40.40
IV.NRCA.HHE. ML:1.1 0.000149 0.82 AML other m 2020-11-30T01:34:41.44
IV.CESI.HHN. ML:1.6 0.0004085 0.16 AML other m 2020-11-30T01:34:41.42
IV.CESI.HHE. ML:1.5 0.0002705 0.22 AML other m 2020-11-30T01:34:41.53
IV.CSP1.EHE. ML:1.6 0.0003025 0.42 AML other m 2020-11-30T01:34:42.08
IV.CSP1.EHN. ML:1.6 0.000306 0.64 AML other m 2020-11-30T01:34:43.77
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