Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.0 on date 17-01-2021 and time 14:42:58 (Italy) in region 4 km W Visso (MC)

A magnitude ML 1.0 earthquake occured in region: 4 km W Visso (MC), on

  • 17-01-2021 13:42:58 (UTC)
  • 17-01-2021 14:42:58 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.9350, 13.0450 at 3 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

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
Preci PG 6 724 1831
Monte Cavallo MC 7 145 1976
Ussita MC 8 444 2420
Castelsantangelo sul Nera MC 10 281 2701
Sellano PG 11 1079 3780
Fiordimonte MC 12 202 3982
Pieve Torina MC 12 1458 5440
Fiastra MC 15 559 5999
Pievebovigliana MC 15 866 6865
Acquacanina MC 15 121 6986
Bolognola MC 16 142 7128
Norcia PG 16 4957 12085
Muccia MC 16 915 13000
Cerreto di Spoleto PG 17 1075 14075
Serravalle di Chienti MC 17 1070 15145

Municipalities with at least 50000 inhabitants

An earthquake occurred to
28 Km E of Foligno (57155 inhabitants)
53 Km NE of Terni (111501 inhabitants)
57 Km E of Perugia (166134 inhabitants)
62 Km NW of Teramo (54892 inhabitants)
71 Km NW of L'Aquila (69753 inhabitants)
85 Km SW of Ancona (100861 inhabitants)
96 Km NE of Viterbo (67173 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
Bulletin
Rev1000 		ML 1.0 2021-01-17
13:42:58		 42.9353 13.0447 3 2021-07-12
16:55:00		 Bollettino Sismico Italiano INGV 87721011
Reviewed
Rev100 		ML 1.0 2021-01-17
13:42:59		 42.9333 13.0412 2 2021-01-17
13:55:43		 Sala Sismica INGV-Roma 86331291
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-01-17 13:42:58 ± 0.1
Latitude 42.9353 ± 0.0036
Longitude 13.0447 ± 0.0037
Depth (km) 3 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 87721011

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 400
Semi-minor axis of confidence ellipse (meter) 141
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 221
Circular confidence region, given by single value of horizontal uncertainty (meter) 400.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 151
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) 0.18
Epicentral distance of station closest to the epicenter (degree) 0.02698
Epicentral distance of station farthest from the epicenter (degree) 0.30847
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 10
Magnitudes information

ML:1.0

Field Value
Value 1.0
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 87721011
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-03-04 15:18:19

ML:1.0

Field Value
Value 1.0
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 86331291
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-01-17 13:55:43
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MF5.EHZ. 2021-01-17T13:43:11.44 0.6 undecidable manual S 80 34.2435 95 0.57 42
IV.GUMA.HHZ. 2021-01-17T13:43:08.77 0.3 undecidable manual S 59 27.4503 96 0.22 70
IV.CSP1.EHZ. 2021-01-17T13:43:06.53 0.3 undecidable manual S 37 21.6672 98 -0.02 74
IV.MMO1.EHZ. 2021-01-17T13:43:06.72 0.6 undecidable manual S 100 23.2545 97 -0.38 45
IV.MF5.EHZ. 2021-01-17T13:43:05.66 0.3 undecidable manual P 80 34.2435 95 -0.17 70
IV.CESI.HHZ. 2021-01-17T13:43:04.20 0.6 undecidable manual S 304 13.7751 102 0.36 46
IV.GUMA.HHZ. 2021-01-17T13:43:04.47 0.3 undecidable manual P 59 27.4503 96 -0.03 73
IV.MC2.EHZ. 2021-01-17T13:43:03.63 0.6 undecidable manual S 103 11.9769 104 0.38 46
IV.MMO1.EHZ. 2021-01-17T13:43:03.50 0.3 undecidable manual P 100 23.2545 97 -0.16 71
IV.FDMO.HHZ. 2021-01-17T13:43:03.21 0.6 undecidable manual S 17 11.7771 104 0.05 50
IV.NRCA.HHZ. 2021-01-17T13:43:03.71 0.6 undecidable manual S 153 12.6762 103 0.25 48
IV.CSP1.EHZ. 2021-01-17T13:43:03.19 0.3 undecidable manual P 37 21.6672 98 -0.15 72
IV.NRCA.HHZ. 2021-01-17T13:43:01.48 0.1 undecidable manual P 153 12.6762 103 -0.08 99
IT.MTCL.HGZ. 2021-01-17T13:43:01.95 0.3 undecidable manual S 331 7.4814 112 0.2 73
IV.MC2.EHZ. 2021-01-17T13:43:01.42 0.3 undecidable manual P 103 11.9769 104 -0.02 75
IV.CESI.HHZ. 2021-01-17T13:43:01.76 0.3 undecidable manual P 304 13.7751 102 -0.01 75
IV.FDMO.HHZ. 2021-01-17T13:43:01.25 0.1 undecidable manual P 17 11.7771 104 -0.13 98
IV.FEMA.HNZ. 2021-01-17T13:43:00.28 0.3 undecidable manual S 8 2.997 135 -0.14 74
IT.MTCL.HGZ. 2021-01-17T13:43:00.49 0.1 undecidable manual P 331 7.4814 112 -0.08 100
IV.FEMA.HNZ. 2021-01-17T13:42:59.71 0.1 undecidable manual P 8 2.997 135 -0.09 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FDMO.HHN. ML:0.9 0.0001278 0.2 AML other m 2021-01-17T13:43:03.53
IV.CESI.HNE. ML:1.0 0.00011797555500000001 1.1936 AML other m 2021-01-17T13:43:04.72
IV.NRCA.HHE. ML:1.0 0.0001505 0.12 AML other m 2021-01-17T13:43:04.19
IV.NRCA.HHN. ML:1.3 0.000262 0.1 AML other m 2021-01-17T13:43:04.27
IV.CESI.HHN. ML:0.8 0.00009140000000000001 0.4 AML other m 2021-01-17T13:43:04.88
IV.FDMO.HHE. ML:0.6 0.00006465 1.32 AML other m 2021-01-17T13:43:06.08
IV.CSP1.EHE. ML:1.0 0.00007552944 1.6352 AML other m 2021-01-17T13:43:07.97
IV.CESI.HHE. ML:0.8 0.00008065 1.58 AML other m 2021-01-17T13:43:08.10
IV.CSP1.EHN. ML:1.2 0.00011257743 0.4224 AML other m 2021-01-17T13:43:08.54
IV.CESI.HNN. ML:1.1 0.0001647329 1.3472 AML other m 2021-01-17T13:43:10.16
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