Earthquake with magnitude of Md 1.1 on date 07-12-2021 and time 00:34:59 (Italy) in region 4 km E Sefro (MC)

A magnitude Md 1.1 earthquake occured in region: 4 km E Sefro (MC), on

  • 06-12-2021 23:34:59 (UTC)
  • 07-12-2021 00:34:59 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.145, 12.995 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
Sefro MC 4 422 422
Pioraco MC 4 1134 1556
Camerino MC 6 6974 8530
Fiuminata MC 7 1402 9932
Muccia MC 8 915 10847
Serravalle di Chienti MC 9 1070 11917
Castelraimondo MC 9 4587 16504
Pievebovigliana MC 12 866 17370
Pieve Torina MC 12 1458 18828
Gagliole MC 12 620 19448
Esanatoglia MC 13 2034 21482
Matelica MC 13 9981 31463
Fiordimonte MC 14 202 31665
Serrapetrona MC 16 966 32631
Monte Cavallo MC 17 145 32776
Nocera Umbra PG 17 5839 38615
San Severino Marche MC 18 12726 51341
Fiastra MC 18 559 51900
Caldarola MC 19 1823 53723
Acquacanina MC 19 121 53844
Gualdo Tadino PG 20 15208 69052
Cerreto d'Esi AN 20 3817 72869
Belforte del Chienti MC 20 1886 74755

Municipalities with at least 50000 inhabitants

An earthquake occurred to
32 Km NE of Foligno (57155 inhabitants)
49 Km E of Perugia (166134 inhabitants)
68 Km SW of Ancona (100861 inhabitants)
71 Km NE of Terni (111501 inhabitants)
78 Km S of Fano (60888 inhabitants)
79 Km NW of Teramo (54892 inhabitants)
86 Km S of Pesaro (94582 inhabitants)
94 Km NW of L'Aquila (69753 inhabitants)
97 Km E of Arezzo (99543 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 2021-12-06
23:34:59
43.1447 12.9952 11 2021-12-06
23:41:45
Sala Sismica INGV-Roma 98223001
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-12-06 23:34:59 ± 0.04
Latitude 43.1447 ± 0.0018
Longitude 12.9952 ± 0.0037
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 98223001

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 278
Semi-minor axis of confidence ellipse (meter) 141
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 253
Circular confidence region, given by single value of horizontal uncertainty (meter) 280
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 135
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) 0.08
Epicentral distance of station closest to the epicenter (degree) 0.11691
Epicentral distance of station farthest from the epicenter (degree) 0.27249
Number of stations at which the event was observed 6
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 5
Type of magnitude Md
Reference to an origin 98223001
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-12-06 23:41:45
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.MC2.EHZ. 2021-12-06T23:35:09.99 0.6 undecidable manual S 149 0.2725 50 0.08 48
IV.EL6.EHZ. 2021-12-06T23:35:07.83 0.6 undecidable manual S 23 0.2005 50 0.07 49
IV.CESI.HNZ. 2021-12-06T23:35:06.42 0.6 undecidable manual S 205 0.1547 122 0.06 49
IV.CSP1.EHZ. 2021-12-06T23:35:06.64 0.6 undecidable manual S 109 0.1619 121 0.04 50
IV.SNTG.HHZ. 2021-12-06T23:35:05.15 0.6 undecidable manual S 340 0.1169 130 -0.05 50
IV.MC2.EHZ. 2021-12-06T23:35:05.29 0.6 undecidable manual P 149 0.2725 50 -0.14 47
IV.FDMO.HHN. 2021-12-06T23:35:05.34 0.3 undecidable manual S 148 0.1268 128 -0.16 73
IV.EL6.EHZ. 2021-12-06T23:35:04.12 0.1 undecidable manual P 23 0.2005 50 -0.08 98
IV.CESI.HNZ. 2021-12-06T23:35:03.38 0.1 undecidable manual P 205 0.1547 122 0 100
IV.CSP1.EHZ. 2021-12-06T23:35:03.60 0.3 positive manual P 109 0.1619 121 0.08 74
IV.SNTG.HHZ. 2021-12-06T23:35:02.78 0.6 undecidable manual P 340 0.1169 130 0.07 50
IV.FDMO.HHN. 2021-12-06T23:35:02.95 0.1 undecidable manual P 148 0.1268 128 0.06 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SNTG.HHZ. Md:0.9 7 END duration s
IV.CSP1.EHZ. Md:1.1 8 END duration s
IV.EL6.EHZ. Md:1.1 8 END duration s
IV.MC2.EHZ. Md:1.3 10 END duration s
IV.CESI.HNZ. Md:1.1 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