Earthquake with magnitude of Md 1.1 on date 07-12-2021 and time 07:18:21 (Italy) in region 6 km NW Preci (PG)

A magnitude Md 1.1 earthquake occured in region: 6 km NW Preci (PG), on

  • 07-12-2021 06:18:21 (UTC)
  • 07-12-2021 07:18:21 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.925, 13.003 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.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Preci PG 6 724 724
Visso MC 7 1107 1831
Sellano PG 7 1079 2910
Monte Cavallo MC 8 145 3055
Ussita MC 11 444 3499
Castelsantangelo sul Nera MC 13 281 3780
Cerreto di Spoleto PG 14 1075 4855
Pieve Torina MC 14 1458 6313
Fiordimonte MC 14 202 6515
Norcia PG 16 4957 11472
Pievebovigliana MC 17 866 12338
Serravalle di Chienti MC 17 1070 13408
Fiastra MC 18 559 13967
Muccia MC 18 915 14882
Acquacanina MC 18 121 15003
Bolognola MC 20 142 15145

Municipalities with at least 50000 inhabitants

An earthquake occurred to
25 Km E of Foligno (57155 inhabitants)
50 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)
88 Km SW of Ancona (100861 inhabitants)
93 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
Md 1.1 2021-12-07
06:18:21
42.9253 13.0032 11 2021-12-07
06:30:37
Sala Sismica INGV-Roma 98228861
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-12-07 06:18:21 ± 0.09
Latitude 42.9253 ± 0.0036
Longitude 13.0032 ± 0.0061
Depth (km) 11 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 98228861

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 519
Semi-minor axis of confidence ellipse (meter) 294
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 242
Circular confidence region, given by single value of horizontal uncertainty (meter) 520
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 180
Number of associated phases, regardless of their use for origin computation 26
Number of defining phases 12
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.11
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.22213
Number of stations at which the event was observed 20
Number of stations from which data was used for origin computation 6
Magnitude information

Md:1.1

Field Value
Value 1.1
Uncertainty 0.1
Num. used stations 3
Type of magnitude Md
Reference to an origin 98228861
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-12-07 06:30:37
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.SARZ.HHZ. 2021-12-07T06:19:36.78 3.0 undecidable manual Sn -1.99 0
OT.OT17.EHZ. 2021-12-07T06:19:33.05 3.0 undecidable manual Sg 8.68 0
GU.PZZ.HHZ. 2021-12-07T06:19:28.50 3.0 undecidable manual Pg 12.63 0
IV.ECTS.HHZ. 2021-12-07T06:19:26.90 3.0 undecidable manual Pn -9.99 0
IV.CADC.HNZ. 2021-12-07T06:19:25.25 3.0 undecidable manual Sn -1.31 0
IV.NOCI.HHZ. 2021-12-07T06:19:16.41 3.0 negative manual Pg 4.47 0
IV.LPEL.HHZ. 2021-12-07T06:19:05.39 3.0 undecidable manual Sn -1.86 0
IV.CMIS.HHZ. 2021-12-07T06:19:03.39 3.0 positive manual Pg 5.55 0
GU.RORO.HHZ. 2021-12-07T06:18:59.08 3.0 positive manual Pn -7.16 0
IV.OSSC.HHZ. 2021-12-07T06:18:56.99 3.0 undecidable manual Sg -0.57 0
IV.FVI.HHZ. 2021-12-07T06:18:53.12 3.0 positive manual Pg -0.51 0
IV.CELB.HHZ. 2021-12-07T06:18:49.00 3.0 undecidable manual Pg -0.15 0
IV.SRES.HHZ. 2021-12-07T06:18:36.05 3.0 positive manual Pg -3.16 0
IV.CSP1.EHZ. 2021-12-07T06:18:30.58 0.6 undecidable manual S 41 0.2221 50 0.01 49
IV.FDMO.HHZ. 2021-12-07T06:18:27.46 0.6 undecidable manual S 29 0.1268 127 -0.09 49
IV.IMOL.HNZ. 2021-12-07T06:18:27.94 3.0 undecidable manual P -5.7 0
IV.NRCA.HHZ. 2021-12-07T06:18:27.14 0.6 undecidable manual S 138 0.1223 128 -0.27 47
IV.CSP1.EHZ. 2021-12-07T06:18:26.57 1.0 positive manual P 41 0.2221 50 -0.13 24
IV.CESI.HHZ. 2021-12-07T06:18:26.87 0.6 undecidable manual S 318 0.107 132 -0.09 49
IV.FEMA.HNE. 2021-12-07T06:18:25.78 0.6 undecidable manual S 43 0.0504 152 0.2 48
IT.MTCL.HGE. 2021-12-07T06:18:25.81 0.6 undecidable manual S 358 0.0683 144 -0.14 49
IT.MTCL.HGE. 2021-12-07T06:18:24.03 0.1 undecidable manual P 358 0.0683 144 -0.01 100
IV.FDMO.HHZ. 2021-12-07T06:18:24.93 0.1 undecidable manual P 29 0.1268 127 -0.03 99
IV.CESI.HHZ. 2021-12-07T06:18:24.66 0.3 undecidable manual P 318 0.107 132 0.04 74
IV.NRCA.HHZ. 2021-12-07T06:18:24.99 0.3 undecidable manual P 138 0.1223 128 0.11 73
IV.FEMA.HNE. 2021-12-07T06:18:23.96 0.1 undecidable manual P 43 0.0504 152 0.14 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FDMO.HHZ. Md:1 8 END duration s
IV.CESI.HHZ. Md:1 8 END duration s
IV.NRCA.HHZ. Md:1 8 END duration s
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