Earthquake with magnitude of ML 1.1 on date 07-12-2021 and time 23:07:59 (Italy) in region 6 km W Visso (MC)

A magnitude ML 1.1 earthquake occured in region: 6 km W Visso (MC), on

  • 07-12-2021 22:07:59 (UTC)
  • 07-12-2021 23:07:59 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.934, 13.01 at 10 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.

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 6 1107 1107
Preci PG 7 724 1831
Monte Cavallo MC 7 145 1976
Sellano PG 8 1079 3055
Ussita MC 11 444 3499
Castelsantangelo sul Nera MC 12 281 3780
Pieve Torina MC 13 1458 5238
Fiordimonte MC 13 202 5440
Cerreto di Spoleto PG 15 1075 6515
Pievebovigliana MC 16 866 7381
Serravalle di Chienti MC 16 1070 8451
Fiastra MC 17 559 9010
Muccia MC 17 915 9925
Norcia PG 17 4957 14882
Acquacanina MC 17 121 15003
Bolognola MC 19 142 15145

Municipalities with at least 50000 inhabitants

An earthquake occurred to
25 Km E of Foligno (57155 inhabitants)
51 Km NE of Terni (111501 inhabitants)
54 Km E of Perugia (166134 inhabitants)
64 Km W of Teramo (54892 inhabitants)
72 Km NW of L'Aquila (69753 inhabitants)
87 Km SW of Ancona (100861 inhabitants)
94 Km NE of Viterbo (67173 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Preliminary map of the earthquake effects from the web questionnaire

Preliminary map of the earthquake effects from the web questionnaire

This map shows the distribution of earthquake resentment in the area, expressed in terms of intensity on the MCS scale (Mercalli-Cancani-Sieberg). Intensities are determined using data from questionnaires collected on the website http://www.hsit.it. The intensities shown are determined considering all the reports received from each municipality, and are all the more reliable the greater the number of questionnaires. The collected data are subjected to an automatic statistical filter, but are not checked individually. In particular, intensities greater than or equal to the VI degree of the MCS or EMS scale require on-site verification by specialized personnel. The black star is the epicenter of the earthquake that occurred. This map is updated every time citizens fill out new questionnaires. The number of questionnaires processed to obtain this map, the date and time of the last update are shown at the top right.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100
ML 1.1 2021-12-07
22:07:59
42.9338 13.0105 11 2021-12-07
22:14:58
Sala Sismica INGV-Roma 98257641
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-12-07 22:07:59 ± 0.17
Latitude 42.9338 ± 0.0063
Longitude 13.0105 ± 0.0135
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 98257641

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1123
Semi-minor axis of confidence ellipse (meter) 551
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 248
Circular confidence region, given by single value of horizontal uncertainty (meter) 1120
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 170
Number of associated phases, regardless of their use for origin computation 15
Number of defining phases 14
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.32
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.38581
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 8
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.1
Num. used stations 2
Type of magnitude ML
Reference to an origin 98257641
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-12-07 22:14:58
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.MMO1.EHZ. 2021-12-07T22:08:09.06 0.1 undecidable manual S 98 0.2338 50 -0.41 89
IV.CSP1.EHZ. 2021-12-07T22:08:08.96 0.1 undecidable manual S 42 0.2122 50 0.13 95
IV.MML1.EHZ. 2021-12-07T22:08:07.46 0.1 undecidable manual S 351 0.1817 117 -0.38 91
IV.SMA1.EHZ. 2021-12-07T22:08:07.56 0.6 negative manual P 142 0.3858 50 -0.48 43
IV.MMO1.EHZ. 2021-12-07T22:08:06.11 1.0 undecidable manual P 98 0.2338 50 0.66 21
IV.CESI.HHZ. 2021-12-07T22:08:05.20 0.1 undecidable manual S 313 0.1052 132 -0.19 96
IV.CSP1.EHZ. 2021-12-07T22:08:05.39 0.3 negative manual P 42 0.2122 50 0.31 69
IV.NRCA.HHZ. 2021-12-07T22:08:05.74 0.1 undecidable manual S 143 0.1259 127 -0.27 94
IV.FDMO.HHZ. 2021-12-07T22:08:05.79 0.1 undecidable manual S 29 0.1169 129 0.05 98
IV.NRCA.HHZ. 2021-12-07T22:08:04.01 0.1 positive manual P 143 0.1259 127 0.55 87
IV.MML1.EHZ. 2021-12-07T22:08:04.61 0.6 negative manual P 351 0.1817 117 0.1 48
IV.FDMO.HHZ. 2021-12-07T22:08:03.65 0.6 undecidable manual P 29 0.1169 129 0.35 46
IV.CESI.HHZ. 2021-12-07T22:08:03.26 0.1 undecidable manual P 313 0.1052 132 0.16 96
IV.MC2.EHZ. 2021-12-07T22:08:03.61 3.0 undecidable manual P -0.67 0
IT.MTCL.HGE. 2021-12-07T22:08:02.47 0.1 undecidable manual P 352 0.0603 147 0.02 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHN. ML:1 0.0001037 0.16 AML other m 2021-12-07T22:08:05.80
IV.NRCA.HHE. ML:1.1 0.0001285 0.08 AML other m 2021-12-07T22:08:05.83
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