Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.5 on date 29-10-2021 and time 06:00:08 (Italy) in region 3 km W Visso (MC)

A magnitude ML 0.5 earthquake occured in region: 3 km W Visso (MC), on

  • 29-10-2021 04:00:08 (UTC)
  • 29-10-2021 06:00:08 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.9290, 13.0540 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
Preci PG 6 724 1831
Ussita MC 7 444 2275
Monte Cavallo MC 8 145 2420
Castelsantangelo sul Nera MC 9 281 2701
Sellano PG 11 1079 3780
Fiordimonte MC 12 202 3982
Pieve Torina MC 13 1458 5440
Fiastra MC 15 559 5999
Acquacanina MC 15 121 6120
Pievebovigliana MC 15 866 6986
Norcia PG 16 4957 11943
Bolognola MC 16 142 12085
Cerreto di Spoleto PG 17 1075 13160
Muccia MC 17 915 14075
Serravalle di Chienti MC 18 1070 15145

Municipalities with at least 50000 inhabitants

An earthquake occurred to
29 Km E of Foligno (57155 inhabitants)
53 Km NE of Terni (111501 inhabitants)
58 Km E of Perugia (166134 inhabitants)
61 Km W of Teramo (54892 inhabitants)
70 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
Reviewed
Rev100 		ML 0.5 2021-10-29
04:00:08		 42.9293 13.0543 11 2021-10-29
04:07:17		 Sala Sismica INGV-Roma 97048491
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-29 04:00:08 ± 0.13
Latitude 42.9293 ± 0.0063
Longitude 13.0543 ± 0.0086
Depth (km) 11 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 97048491

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 872
Semi-minor axis of confidence ellipse (meter) 388
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 229
Circular confidence region, given by single value of horizontal uncertainty (meter) 870.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 150
Number of associated phases, regardless of their use for origin computation 10
Number of defining phases 10
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.25
Epicentral distance of station closest to the epicenter (degree) 0.09982
Epicentral distance of station farthest from the epicenter (degree) 0.20145
Number of stations at which the event was observed 5
Number of stations from which data was used for origin computation 5
Magnitude information

ML:0.5

Field Value
Value 0.5
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 97048491
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-29 04:07:17
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MMO1.EHZ. 2021-10-29T04:00:16.56 0.3 undecidable manual S 98 22.3554 50 0.02 74
IV.CESI.HHZ. 2021-10-29T04:00:14.39 0.1 undecidable manual S 305 14.7741 126 0.02 100
IV.NRCA.HHZ. 2021-10-29T04:00:13.44 0.1 undecidable manual S 155 11.6772 133 -0.11 99
IV.FDMO.HHZ. 2021-10-29T04:00:13.88 0.3 undecidable manual S 13 12.1767 131 0.21 72
IV.MMO1.EHZ. 2021-10-29T04:00:13.00 0.1 undecidable manual P 98 22.3554 50 0.06 98
IV.MC2.EHZ. 2021-10-29T04:00:13.63 0.3 undecidable manual S 100 11.0778 134 0.23 72
IV.NRCA.HHZ. 2021-10-29T04:00:11.34 0.1 undecidable manual P 155 11.6772 133 0.12 98
IV.CESI.HHZ. 2021-10-29T04:00:11.83 0.1 undecidable manual P 305 14.7741 126 0.14 98
IV.MC2.EHZ. 2021-10-29T04:00:10.90 0.3 undecidable manual P 100 11.0778 134 -0.23 72
IV.FDMO.HHZ. 2021-10-29T04:00:10.71 0.3 undecidable manual P 13 12.1767 131 -0.58 66
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHN. ML:0.6 0.000039800000000000005 0.14 AML other m 2021-10-29T04:00:13.56
IV.NRCA.HHE. ML:0.5 0.000035999999999999994 0.26 AML other m 2021-10-29T04:00:14.01
IV.CESI.HHN. ML:0.7 0.0000499 0.2 AML other m 2021-10-29T04:00:14.78
IV.CESI.HHE. ML:0.6 0.00003785 0.9 AML other m 2021-10-29T04:00:15.81
IV.FDMO.HHE. ML:0.3 0.000019481224999999997 0.1216 AML other m 2021-10-29T04:00:14.25
IV.FDMO.HHN. ML:0.3 0.00001850717 0.1408 AML other m 2021-10-29T04:00:14.50
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