Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.1 on date 18-12-2020 and time 07:10:35 (Italy) in region 8 km W Fossato di Vico (PG)

A magnitude ML 1.1 earthquake occured in region: 8 km W Fossato di Vico (PG), on

  • 18-12-2020 06:10:35 (UTC)
  • 18-12-2020 07:10:35 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.2660, 12.6700 at 13 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
Fossato di Vico PG 8 2840 2840
Sigillo PG 9 2404 5244
Gualdo Tadino PG 10 15208 20452
Costacciaro PG 11 1216 21668
Gubbio PG 12 32216 53884
Valfabbrica PG 13 3389 57273
Scheggia e Pascelupo PG 16 1393 58666
Nocera Umbra PG 20 5839 64505

Municipalities with at least 50000 inhabitants

An earthquake occurred to
29 Km NE of Perugia (166134 inhabitants)
35 Km N of Foligno (57155 inhabitants)
68 Km E of Arezzo (99543 inhabitants)
70 Km SW of Fano (60888 inhabitants)
74 Km S of Pesaro (94582 inhabitants)
78 Km N of Terni (111501 inhabitants)
79 Km SW of Ancona (100861 inhabitants)
89 Km S of Rimini (147750 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100 		ML 1.1 2020-12-18
06:10:35		 43.2657 12.6705 13 2020-12-18
06:15:55		 Sala Sismica INGV-Roma 85510171
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-12-18 06:10:35 ± 0.07
Latitude 43.2657 ± 0.0027
Longitude 12.6705 ± 0.0037
Depth (km) 13 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 85510171

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 328
Semi-minor axis of confidence ellipse (meter) 127
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 272
Circular confidence region, given by single value of horizontal uncertainty (meter) 330.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 89
Number of associated phases, regardless of their use for origin computation 17
Number of defining phases 17
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.13
Epicentral distance of station closest to the epicenter (degree) 0.08364
Epicentral distance of station farthest from the epicenter (degree) 0.32016
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 9
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.3
Num. used stations 8
Type of magnitude ML
Reference to an origin 85510171
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-12-18 06:15:55
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.SNTG.HHZ. 2020-12-18T06:10:44.00 0.3 undecidable manual S 93 21.867 100 -0.15 74
IV.ASSB.HHZ. 2020-12-18T06:10:44.66 0.3 undecidable manual S 182 24.753 97 -0.26 71
IV.ATVO.HHZ. 2020-12-18T06:10:44.83 0.3 undecidable manual S 301 24.9528 97 -0.13 71
IV.SSFR.HHN. 2020-12-18T06:10:43.81 0.3 undecidable manual S 25 20.9679 101 -0.1 73
IV.EL6.EHZ. 2020-12-18T06:10:42.85 1.0 undecidable manual P 78 35.5422 94 0.12 23
IV.ATFO.HHZ. 2020-12-18T06:10:42.10 0.3 undecidable manual S 325 13.7751 116 0.02 75
IV.ATSC.EHN. 2020-12-18T06:10:42.96 0.3 undecidable manual S 4 17.5713 106 -0.08 74
IV.MURB.HHZ. 2020-12-18T06:10:41.76 0.3 undecidable manual S 269 11.7771 123 0.14 75
IV.ATVO.HHZ. 2020-12-18T06:10:41.16 0.3 undecidable manual P 301 24.9528 97 0.06 74
IV.ATCC.EHZ. 2020-12-18T06:10:41.00 0.3 undecidable manual S 195 9.2796 133 -0.09 75
IV.ASSB.HHZ. 2020-12-18T06:10:40.97 0.3 undecidable manual P 182 24.753 97 -0.1 73
IV.ATSC.EHN. 2020-12-18T06:10:40.06 0.1 undecidable manual P 4 17.5713 106 0.07 99
IV.SSFR.HHN. 2020-12-18T06:10:40.39 0.1 undecidable manual P 25 20.9679 101 -0.1 98
IV.SNTG.HHZ. 2020-12-18T06:10:40.96 0.6 positive manual P 93 21.867 100 0.33 46
IV.ATFO.HHZ. 2020-12-18T06:10:39.52 0.3 undecidable manual P 325 13.7751 116 0.08 75
IV.MURB.HHZ. 2020-12-18T06:10:39.33 0.1 undecidable manual P 269 11.7771 123 0.16 99
IV.ATCC.EHZ. 2020-12-18T06:10:38.94 0.1 undecidable manual P 195 9.2796 133 0.08 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ATCC.EHN. ML:1.3 0.0002215 0.1 AML other m 2020-12-18T06:10:41.06
IV.ATCC.EHE. ML:1.4 0.0002825 0.24 AML other m 2020-12-18T06:10:41.19
IV.MURB.HHE. ML:1.4 0.00027449999999999995 0.24 AML other m 2020-12-18T06:10:42.11
IV.ATFO.HHN. ML:0.9 0.00007305 1.12 AML other m 2020-12-18T06:10:42.33
IV.ATFO.HHE. ML:1.0 0.00009125 0.38 AML other m 2020-12-18T06:10:42.66
IV.MURB.HHN. ML:1.2 0.0001505 1.38 AML other m 2020-12-18T06:10:42.24
IV.ATVO.HHN. ML:0.6 0.000027099999999999998 0.7 AML other m 2020-12-18T06:10:45.36
IV.ATVO.HHE. ML:0.6 0.000018724999999999998 0.6 AML other m 2020-12-18T06:10:45.55
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download