Earthquake with magnitude of ML 0.4 on date 17-12-2020 and time 06:17:30 (Italy) in region 3 km SE Visso (MC)

A magnitude ML 0.4 earthquake occured in region: 3 km SE Visso (MC), on

  • 17-12-2020 05:17:30 (UTC)
  • 17-12-2020 06:17:30 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.92, 13.12 at 9 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.

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 4 444 1551
Castelsantangelo sul Nera MC 4 281 1832
Preci PG 8 724 2556
Bolognola MC 13 142 2698
Monte Cavallo MC 13 145 2843
Acquacanina MC 14 121 2964
Norcia PG 14 4957 7921
Fiastra MC 14 559 8480
Fiordimonte MC 14 202 8682
Pieve Torina MC 15 1458 10140
Sellano PG 16 1079 11219
Pievebovigliana MC 17 866 12085
Montemonaco AP 17 604 12689
Montefortino FM 19 1178 13867
Montegallo AP 19 523 14390
Cerreto di Spoleto PG 20 1075 15465
Muccia MC 20 915 16380

Municipalities with at least 50000 inhabitants

An earthquake occurred to
34 Km E of Foligno (57155 inhabitants)
55 Km NE of Terni (111501 inhabitants)
56 Km NW of Teramo (54892 inhabitants)
63 Km E of Perugia (166134 inhabitants)
67 Km NW of L'Aquila (69753 inhabitants)
85 Km SW of Ancona (100861 inhabitants)
95 Km W of Montesilvano (53738 inhabitants)
100 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 0.4 2020-12-17
05:17:30
42.92 13.12 9 2020-12-17
05:25:47
Sala Sismica INGV-Roma 85487371
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-12-17 05:17:30 ± 0.12
Latitude 42.92 ± 0.00
Longitude 13.12 ± 0.00
Depth (km) 9 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 85487371

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 334
Semi-minor axis of confidence ellipse (meter) 135
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 29
Circular confidence region, given by single value of horizontal uncertainty (meter) 330
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 118
Number of associated phases, regardless of their use for origin computation 34
Number of defining phases 18
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.16
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.2608
Number of stations at which the event was observed 24
Number of stations from which data was used for origin computation 9
Magnitude information

ML:0.4

Field Value
Value 0.4
Uncertainty 0.3
Num. used stations 6
Type of magnitude ML
Reference to an origin 85487371
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-12-17 05:25:47
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.CET2.HHZ. 2020-12-17T05:18:56.84 3.0 undecidable manual Sn -5.87 0
IV.MAGA.HHZ. 2020-12-17T05:18:50.75 3.0 undecidable manual Sn 0.89 0
IV.CADC.HNZ. 2020-12-17T05:18:47.83 3.0 undecidable manual Sn -0.22 0
OT.OT13.EHZ. 2020-12-17T05:18:45.55 3.0 undecidable manual Sg 15.25 0
XK.GIZZ.HHZ. 2020-12-17T05:18:43.27 3.0 negative manual Pg 19.23 0
MN.TRI.HHZ. 2020-12-17T05:18:40.36 3.0 undecidable manual Sn 0.02 0
IV.GALF.HHZ. 2020-12-17T05:18:29.21 3.0 negative manual Pn -3.79 0
IV.MILN.HNZ. 2020-12-17T05:18:16.80 3.0 undecidable manual Pn 2.8 0
IV.EUCT.HNZ. 2020-12-17T05:18:12.49 3.0 negative manual Pn 0.35 0
IV.BLLA.EHZ. 2020-12-17T05:18:02.77 3.0 undecidable manual Sn -1.36 0
IV.SBPO.HNZ. 2020-12-17T05:17:59.85 3.0 positive manual Pn 0.29 0
IV.CRTO.HHZ. 2020-12-17T05:17:53.74 3.0 positive manual Pn 0.1 0
IV.VCRE.HHZ. 2020-12-17T05:17:53.36 3.0 positive manual Pn -0.35 0
IV.NARO.HHZ. 2020-12-17T05:17:49.46 3.0 undecidable manual Sn -4.44 0
IV.MF5.EHZ. 2020-12-17T05:17:41.38 0.3 undecidable manual S 74 0.2608 108 0.39 67
IV.SENI.EHZ. 2020-12-17T05:17:39.44 3.0 undecidable manual Pn 0.68 0
IV.CSP1.EHZ. 2020-12-17T05:17:38.15 0.3 undecidable manual S 20 0.1871 114 -0.2 71
IV.CESI.HHN. 2020-12-17T05:17:38.12 0.3 undecidable manual S 300 0.1799 115 0.04 74
IV.NARO.HHZ. 2020-12-17T05:17:38.56 3.0 undecidable manual P 0.8 0
IV.FDMO.HHZ. 2020-12-17T05:17:36.03 0.1 undecidable manual S 350 0.1232 124 -0.14 97
IV.MF5.EHZ. 2020-12-17T05:17:36.60 0.1 undecidable manual P 74 0.2608 108 0.06 96
IV.MMO1.EHZ. 2020-12-17T05:17:36.94 0.1 undecidable manual S 96 0.1538 118 -0.26 94
IT.MTCL.HGE. 2020-12-17T05:17:35.84 0.3 undecidable manual S 312 0.1169 125 -0.13 73
IV.MMO1.EHZ. 2020-12-17T05:17:34.24 0.1 undecidable manual P 96 0.1538 118 -0.11 97
IV.NRCA.HHZ. 2020-12-17T05:17:34.79 0.1 undecidable manual S 182 0.0818 135 -0.17 97
IV.FEMA.HNE. 2020-12-17T05:17:34.74 0.3 undecidable manual S 313 0.0683 141 0.15 73
IV.CSP1.EHZ. 2020-12-17T05:17:34.97 0.3 undecidable manual P 20 0.1871 114 -0.05 73
IV.MC2.EHE. 2020-12-17T05:17:34.45 0.3 undecidable manual S 94 0.0522 148 0.21 73
IV.CESI.HHN. 2020-12-17T05:17:34.86 0.1 undecidable manual P 300 0.1799 115 0 99
IT.MTCL.HGE. 2020-12-17T05:17:33.65 0.1 undecidable manual P 312 0.1169 125 0.01 100
IV.NRCA.HHZ. 2020-12-17T05:17:33.09 0.1 undecidable manual P 182 0.0818 135 0.03 100
IV.FEMA.HNE. 2020-12-17T05:17:33.08 0.1 undecidable manual P 313 0.0683 141 0.23 96
IV.FDMO.HHZ. 2020-12-17T05:17:33.75 0.1 undecidable manual P 350 0.1232 124 -0.01 100
IV.MC2.EHE. 2020-12-17T05:17:32.73 0.1 undecidable manual P 94 0.0522 148 0.09 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FDMO.HHE. ML:0 9.989657E-6 0.1216 AML other m 2020-12-17T05:17:36.38
IV.FDMO.HHN. ML:0.2 1.259623E-5 0.1216 AML other m 2020-12-17T05:17:36.30
IV.CSP1.EHE. ML:0.7 3.647055E-5 0.16 AML other m 2020-12-17T05:17:38.86
IV.CSP1.EHN. ML:0.8 4.66455478E-5 0.1376 AML other m 2020-12-17T05:17:38.23
IV.MF5.EHE. ML:0.3 7.688039E-6 0.2976 AML other m 2020-12-17T05:17:41.77
IV.MF5.EHN. ML:0.5 1.45702365E-5 0.4992 AML other m 2020-12-17T05:17:41.51
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