Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.1 on date 25-11-2020 and time 15:04:05 (Italy) in region 3 km NW Visso (MC)

A magnitude ML 1.1 earthquake occured in region: 3 km NW Visso (MC), on

  • 25-11-2020 14:04:05 (UTC)
  • 25-11-2020 15:04:05 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.95, 13.07 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
Visso MC 3 1107 1107
Ussita MC 6 444 1551
Monte Cavallo MC 7 145 1696
Preci PG 8 724 2420
Castelsantangelo sul Nera MC 9 281 2701
Fiordimonte MC 10 202 2903
Pieve Torina MC 10 1458 4361
Fiastra MC 12 559 4920
Pievebovigliana MC 12 866 5786
Acquacanina MC 12 121 5907
Sellano PG 13 1079 6986
Bolognola MC 14 142 7128
Muccia MC 15 915 8043
Serravalle di Chienti MC 16 1070 9113
Norcia PG 18 4957 14070
Cerreto di Spoleto PG 19 1075 15145

Municipalities with at least 50000 inhabitants

An earthquake occurred to
30 Km E of Foligno (57155 inhabitants)
55 Km NE of Terni (111501 inhabitants)
58 Km E of Perugia (166134 inhabitants)
61 Km NW of Teramo (54892 inhabitants)
72 Km NW of L'Aquila (69753 inhabitants)
83 Km SW of Ancona (100861 inhabitants)
99 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 1.1 2020-11-25
14:04:05		 42.95 13.07 11 2020-11-25
14:23:06		 Sala Sismica INGV-Roma 85009431
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-11-25 14:04:05 ± 0.04
Latitude 42.95 ± 0.00
Longitude 13.07 ± 0.01
Depth (km) 11 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 85009431

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 510
Semi-minor axis of confidence ellipse (meter) 300
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 240
Circular confidence region, given by single value of horizontal uncertainty (meter) 510
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 123
Number of associated phases, regardless of their use for origin computation 27
Number of defining phases 16
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.14
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.31206
Number of stations at which the event was observed 17
Number of stations from which data was used for origin computation 8
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 85009431
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-11-25 14:23:06
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
OX.DRE.HHZ. 2020-11-25T14:04:34.81 3.0 undecidable manual Pn 2.92 0
IV.IFIL.HHZ. 2020-11-25T14:04:29.84 3.0 undecidable manual Pn 4.9 0
IV.ASSB.HHN. 2020-11-25T14:04:17.52 0.3 undecidable manual S 287 0.3121 90 -0.09 72
IV.TERO.HHZ. 2020-11-25T14:04:16.47 3.0 undecidable manual P 0
IV.MOMA.HHZ. 2020-11-25T14:04:15.37 3.0 undecidable manual P 0
IV.CSP1.EHZ. 2020-11-25T14:04:13.33 0.3 undecidable manual S 36 0.1718 90 -0.11 73
IV.CESI.HHZ. 2020-11-25T14:04:12.33 0.3 undecidable manual S 294 0.1304 91 0.11 72
IV.ASSB.HHN. 2020-11-25T14:04:12.45 0.3 undecidable manual P 287 0.3121 90 -0.21 70
IV.NRCA.HNN. 2020-11-25T14:04:11.78 0.3 undecidable manual S 164 0.1232 92 -0.23 71
IV.MC2.EHZ. 2020-11-25T14:04:11.48 0.3 undecidable manual S 115 0.0971 115 0.2 73
IT.MTCL.HGZ. 2020-11-25T14:04:10.32 0.3 undecidable manual S 310 0.0648 135 -0.17 74
IV.FDMO.HHZ. 2020-11-25T14:04:10.78 0.3 undecidable manual S 10 0.0854 122 -0.18 73
IV.CSP1.EHZ. 2020-11-25T14:04:10.20 0.1 undecidable manual P 36 0.1718 90 -0.05 98
IV.MC2.EHZ. 2020-11-25T14:04:09.16 0.3 undecidable manual P 115 0.0971 115 0.16 73
IV.CESI.HHZ. 2020-11-25T14:04:09.60 0.1 undecidable manual P 294 0.1304 91 0.05 98
IV.FEMA.HNZ. 2020-11-25T14:04:09.89 0.3 undecidable manual S 306 0.0162 168 0.09 75
IV.NRCA.HNN. 2020-11-25T14:04:09.38 0.1 undecidable manual P 164 0.1232 92 -0.05 99
IV.FEMA.HNZ. 2020-11-25T14:04:08.34 0.1 undecidable manual P 306 0.0162 168 0.19 98
IT.MTCL.HGZ. 2020-11-25T14:04:08.58 0.1 undecidable manual P 310 0.0648 135 0.03 100
IV.FDMO.HHZ. 2020-11-25T14:04:08.85 0.1 undecidable manual P 10 0.0854 122 0.03 100
IV.CAMP.HHZ. 2020-11-25T14:04:04.84 3.0 undecidable manual S 0
IV.CAMP.HHZ. 2020-11-25T14:04:02.67 3.0 undecidable manual P 0
IV.PTQR.HHZ. 2020-11-25T14:03:57.55 3.0 undecidable manual S 0
IV.PTQR.HHZ. 2020-11-25T14:03:54.45 3.0 undecidable manual P 0
IV.MMO1.EHZ. 2020-11-25T14:03:45.55 3.0 undecidable manual P -0.37 0
IV.LAV9.HNZ. 2020-11-25T14:03:40.43 3.0 negative manual P -0.1 0
IV.VVLD.HHZ. 2020-11-25T14:03:36.45 3.0 positive manual P 0.24 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FDMO.HHN. ML:0.9 0.0001065 1.18 AML other m 2020-11-25T14:04:10.94
IV.FDMO.HHE. ML:1.2 0.0001965 1.5 AML other m 2020-11-25T14:04:11.96
IV.CESI.HHN. ML:1.2 0.0001385 0.2 AML other m 2020-11-25T14:04:12.47
IV.CESI.HHE. ML:0.9 7.11E-5 0.38 AML other m 2020-11-25T14:04:12.57
IV.CSP1.EHE. ML:1.2 0.00010645 0.88 AML other m 2020-11-25T14:04:13.41
IV.CSP1.EHN. ML:1.3 0.0001438 0.86 AML other m 2020-11-25T14:04:14.94
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