Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.7 on date 29-12-2021 and time 22:39:04 (UTC) in region 3 km SE Visso (MC)

A magnitude ML 0.7 earthquake occured in region: 3 km SE Visso (MC), on

  • 29-12-2021 22:39:04 (UTC)
  • 29-12-2021 23:39:04 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.9070, 13.1120 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
Visso MC 3 1107 1107
Castelsantangelo sul Nera MC 4 281 1388
Ussita MC 5 444 1832
Preci PG 7 724 2556
Norcia PG 13 4957 7513
Monte Cavallo MC 13 145 7658
Bolognola MC 14 142 7800
Fiordimonte MC 15 202 8002
Acquacanina MC 15 121 8123
Fiastra MC 15 559 8682
Sellano PG 15 1079 9761
Pieve Torina MC 16 1458 11219
Pievebovigliana MC 18 866 12085
Montemonaco AP 18 604 12689
Cerreto di Spoleto PG 19 1075 13764
Montefortino FM 19 1178 14942
Montegallo AP 19 523 15465

Municipalities with at least 50000 inhabitants

An earthquake occurred to
34 Km E of Foligno (57155 inhabitants)
54 Km NE of Terni (111501 inhabitants)
56 Km NW of Teramo (54892 inhabitants)
63 Km E of Perugia (166134 inhabitants)
66 Km NW of L'Aquila (69753 inhabitants)
86 Km SW of Ancona (100861 inhabitants)
95 Km W of Montesilvano (53738 inhabitants)
99 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 0.7 2021-12-29
22:39:04		 42.9073 13.1125 13 2021-12-29
22:48:02		 Sala Sismica INGV-Roma 99129231
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-12-29 22:39:04 ± 0.11
Latitude 42.9073 ± 0.0054
Longitude 13.1125 ± 0.0061
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 99129231

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 535
Semi-minor axis of confidence ellipse (meter) 374
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 211
Circular confidence region, given by single value of horizontal uncertainty (meter) 540.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 124
Number of associated phases, regardless of their use for origin computation 12
Number of defining phases 12
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) 0.05576
Epicentral distance of station farthest from the epicenter (degree) 0.19605
Number of stations at which the event was observed 6
Number of stations from which data was used for origin computation 6
Magnitude information

ML:0.7

Field Value
Value 0.7
Uncertainty 0.4
Num. used stations 12
Type of magnitude ML
Reference to an origin 99129231
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-12-29 22:48:02
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CESI.HHZ. 2021-12-29T22:39:12.44 0.3 undecidable manual S 303 20.0688 102 0.05 74
IV.CSP1.EHZ. 2021-12-29T22:39:12.83 0.3 undecidable manual S 20 21.7671 100 -0.02 74
IV.MMO1.EHZ. 2021-12-29T22:39:11.48 0.1 undecidable manual S 93 17.4714 106 -0.24 95
IV.FDMO.HHZ. 2021-12-29T22:39:10.70 0.1 undecidable manual S 352 14.4744 114 -0.27 95
IV.CSP1.EHZ. 2021-12-29T22:39:09.44 0.1 undecidable manual P 20 21.7671 100 0.1 97
IV.NRCA.HHZ. 2021-12-29T22:39:09.45 0.1 undecidable manual S 179 8.1807 137 -0.15 97
IV.MC2.EHZ. 2021-12-29T22:39:09.42 0.3 undecidable manual S 86 6.1938 146 0.14 74
IV.CESI.HHZ. 2021-12-29T22:39:09.12 0.1 undecidable manual P 303 20.0688 102 0.04 99
IV.FDMO.HHZ. 2021-12-29T22:39:08.25 0.1 undecidable manual P 352 14.4744 114 0 100
IV.MMO1.EHZ. 2021-12-29T22:39:08.80 0.1 undecidable manual P 93 17.4714 106 0.12 97
IV.MC2.EHZ. 2021-12-29T22:39:07.55 0.1 undecidable manual P 86 6.1938 146 0.27 96
IV.NRCA.HHZ. 2021-12-29T22:39:07.44 0.1 undecidable manual P 179 8.1807 137 -0.02 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHN. ML:0.5 0.000042050000000000006 0.14 AML other m 2021-12-29T22:39:09.58
IV.NRCA.HHE. ML:0.5 0.00003298885 0.0896 AML other m 2021-12-29T22:39:09.63
IV.NRCA.HNE. ML:1.0 0.00011855727999999999 4.672 AML other m 2021-12-29T22:39:10.53
IV.NRCA.HNN. ML:1.3 0.00024066720000000003 1.3184 AML other m 2021-12-29T22:39:09.19
IV.MC2.EHE. ML:0.4 0.00003494115 6.784 AML other m 2021-12-29T22:39:09.95
IV.MC2.EHN. ML:1.0 0.00012001877500000001 17.0752 AML other m 2021-12-29T22:39:15.44
IV.FDMO.HHE. ML:0.2 0.000013553865 5.184 AML other m 2021-12-29T22:39:16.63
IV.FDMO.HHN. ML:0.6 0.000036525165 4.8 AML other m 2021-12-29T22:39:16.76
IV.CESI.HHE. ML:0.5 0.000020136445 5.3376 AML other m 2021-12-29T22:39:12.65
IV.CESI.HHN. ML:0.6 0.000026290960000000003 0.1664 AML other m 2021-12-29T22:39:12.65
IV.CESI.HNE. ML:1.3 0.00013151474499999998 1.1136 AML other m 2021-12-29T22:39:19.99
IV.CESI.HNN. ML:1.5 0.00021834684999999998 2.1632 AML other m 2021-12-29T22:39:16.21
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