Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.1 on date 19-01-2021 and time 13:46:54 (Italy) in region 4 km NW Visso (MC)

A magnitude ML 1.1 earthquake occured in region: 4 km NW Visso (MC), on

  • 19-01-2021 12:46:54 (UTC)
  • 19-01-2021 13:46:54 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.9550, 13.0470 at 3 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 4 1107 1107
Monte Cavallo MC 6 145 1252
Ussita MC 8 444 1696
Preci PG 8 724 2420
Fiordimonte MC 10 202 2622
Pieve Torina MC 10 1458 4080
Castelsantangelo sul Nera MC 11 281 4361
Sellano PG 12 1079 5440
Pievebovigliana MC 13 866 6306
Fiastra MC 13 559 6865
Acquacanina MC 14 121 6986
Muccia MC 14 915 7901
Serravalle di Chienti MC 15 1070 8971
Bolognola MC 15 142 9113
Cerreto di Spoleto PG 18 1075 10188
Norcia PG 18 4957 15145

Municipalities with at least 50000 inhabitants

An earthquake occurred to
28 Km E of Foligno (57155 inhabitants)
55 Km NE of Terni (111501 inhabitants)
56 Km E of Perugia (166134 inhabitants)
63 Km NW of Teramo (54892 inhabitants)
73 Km NW of L'Aquila (69753 inhabitants)
83 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
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100 		ML 1.1 2021-01-19
12:46:54		 42.9548 13.0467 3 2021-01-19
13:23:57		 Sala Sismica INGV-Roma 86378931
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-01-19 12:46:54 ± 0.16
Latitude 42.9548 ± 0.0054
Longitude 13.0467 ± 0.0074
Depth (km) 3 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 86378931

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 675
Semi-minor axis of confidence ellipse (meter) 181
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 41
Circular confidence region, given by single value of horizontal uncertainty (meter) 670.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 138
Number of associated phases, regardless of their use for origin computation 20
Number of defining phases 20
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.34
Epicentral distance of station closest to the epicenter (degree) 0.00719
Epicentral distance of station farthest from the epicenter (degree) 0.37592
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 10
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 86378931
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-01-19 13:23:57
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.EL6.EHZ. 2021-01-19T12:47:08.68 0.3 undecidable manual S 6 41.7249 94 -0.68 60
IV.MF5.EHZ. 2021-01-19T12:47:07.33 0.3 undecidable manual S 84 33.744 95 0.75 59
IV.EL6.EHZ. 2021-01-19T12:47:03.05 0.1 undecidable manual P 6 41.7249 94 -0.17 92
IV.MMO1.EHZ. 2021-01-19T12:47:02.81 0.3 undecidable manual S 105 23.5542 97 -0.27 70
IV.CSP1.EHZ. 2021-01-19T12:47:01.72 0.6 undecidable manual S 40 19.869 99 -0.09 49
IV.MF5.EHZ. 2021-01-19T12:47:01.38 1.0 undecidable manual P 84 33.744 95 -0.23 23
IV.MC2.EHZ. 2021-01-19T12:47:00.27 0.3 undecidable manual S 113 12.4764 104 0.97 56
IV.MMO1.EHZ. 2021-01-19T12:46:59.08 0.6 undecidable manual P 105 23.5542 97 -0.51 44
IV.NRCA.HHZ. 2021-01-19T12:46:59.96 0.3 undecidable manual S 158 14.5743 102 -0.02 75
IV.CESI.HHZ. 2021-01-19T12:46:59.94 0.3 undecidable manual S 296 12.7761 104 0.55 66
IV.FDMO.HHE. 2021-01-19T12:46:58.64 0.1 undecidable manual S 20 9.5793 108 0.31 95
IV.CSP1.EHZ. 2021-01-19T12:46:58.73 0.6 undecidable manual P 40 19.869 99 -0.12 48
IV.CESI.HHZ. 2021-01-19T12:46:57.48 0.1 positive manual P 296 12.7761 104 0.02 100
IV.MC2.EHZ. 2021-01-19T12:46:57.27 0.6 positive manual P 113 12.4764 104 -0.14 49
IV.NRCA.HHZ. 2021-01-19T12:46:57.47 0.3 undecidable manual P 158 14.5743 102 -0.33 70
IT.MTCL.HGZ. 2021-01-19T12:46:57.39 0.1 undecidable manual S 318 5.7942 118 0.29 96
IT.MTCL.HGZ. 2021-01-19T12:46:56.05 0.1 undecidable manual P 318 5.7942 118 -0.09 100
IV.FDMO.HHE. 2021-01-19T12:46:56.81 0.1 undecidable manual P 20 9.5793 108 -0.04 100
IV.FEMA.HNZ. 2021-01-19T12:46:55.33 0.1 negative manual P 17 0.7992 165 -0.14 100
IV.FEMA.HNZ. 2021-01-19T12:46:55.67 0.1 undecidable manual S 17 0.7992 165 -0.26 97
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHN. ML:1.1 0.00016 0.14 AML other m 2021-01-19T12:47:00.16
IV.CESI.HHN. ML:1.0 0.000153 0.3 AML other m 2021-01-19T12:47:00.20
IV.CESI.HHE. ML:0.9 0.00010195 0.34 AML other m 2021-01-19T12:47:00.36
IV.NRCA.HHE. ML:1.1 0.000142 0.98 AML other m 2021-01-19T12:47:00.41
IV.CSP1.EHN. ML:1.3 0.00017199999999999998 0.68 AML other m 2021-01-19T12:47:04.62
IV.CSP1.EHE. ML:1.2 0.0001197 0.44 AML other m 2021-01-19T12:47:04.72
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