Earthquake with magnitude of ML 0.5 on date 23-10-2021 and time 05:07:10 (Italy) in region 6 km W Serravalle di Chienti (MC)

A magnitude ML 0.5 earthquake occured in region: 6 km W Serravalle di Chienti (MC), on

  • 23-10-2021 03:07:10 (UTC)
  • 23-10-2021 05:07:10 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.087, 12.879 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
Serravalle di Chienti MC 6 1070 1070
Nocera Umbra PG 8 5839 6909
Sefro MC 9 422 7331
Valtopina PG 11 1398 8729
Fiuminata MC 12 1402 10131
Muccia MC 14 915 11046
Pioraco MC 14 1134 12180
Monte Cavallo MC 14 145 12325
Pieve Torina MC 15 1458 13783
Camerino MC 16 6974 20757
Pievebovigliana MC 17 866 21623
Gualdo Tadino PG 18 15208 36831
Fiordimonte MC 18 202 37033
Esanatoglia MC 19 2034 39067
Spello PG 20 8645 47712

Municipalities with at least 50000 inhabitants

An earthquake occurred to
20 Km NE of Foligno (57155 inhabitants)
40 Km E of Perugia (166134 inhabitants)
61 Km NE of Terni (111501 inhabitants)
79 Km SW of Ancona (100861 inhabitants)
82 Km NW of Teramo (54892 inhabitants)
85 Km S of Fano (60888 inhabitants)
91 Km E of Arezzo (99543 inhabitants)
92 Km S of Pesaro (94582 inhabitants)
92 Km NW of L'Aquila (69753 inhabitants)
98 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 the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire (http://www.haisentitoilterremoto.it/) that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100
ML 0.5 2021-10-23
03:07:10
43.0867 12.8788 10 2021-10-23
03:18:30
Sala Sismica INGV-Roma 96898611
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-23 03:07:10 ± 0.17
Latitude 43.0867 ± 0.0117
Longitude 12.8788 ± 0.0086
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 96898611

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1212
Semi-minor axis of confidence ellipse (meter) 470
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 197
Circular confidence region, given by single value of horizontal uncertainty (meter) 1210
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 128
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) 0.31
Epicentral distance of station closest to the epicenter (degree) 0.07285
Epicentral distance of station farthest from the epicenter (degree) 0.23832
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:0.5

Field Value
Value 0.5
Uncertainty 0.1
Num. used stations 4
Type of magnitude ML
Reference to an origin 96898611
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-23 03:18:30
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.CSP1.EHZ. 2021-10-23T03:07:20.22 0.6 undecidable manual S 89 0.2383 50 0.1 53
IV.ATCC.HNN. 2021-10-23T03:07:19.31 0.1 undecidable manual S 300 0.2005 115 0.38 100
IV.ASSB.HHZ. 2021-10-23T03:07:17.89 0.6 undecidable manual S 255 0.1664 119 0.1 53
IV.FDMO.HHZ. 2021-10-23T03:07:17.50 0.6 undecidable manual S 108 0.1601 120 -0.07 54
IV.CSP1.EHZ. 2021-10-23T03:07:16.11 1.0 negative manual P 89 0.2383 50 0.09 26
IV.CESI.HHZ. 2021-10-23T03:07:15.06 0.6 undecidable manual S 167 0.0836 138 -0.2 53
IV.FDMO.HHZ. 2021-10-23T03:07:14.61 0.6 positive manual P 108 0.1601 120 0.05 54
IV.MML1.EHZ. 2021-10-23T03:07:14.95 0.6 undecidable manual S 68 0.0728 142 -0.03 55
IV.ASSB.HHZ. 2021-10-23T03:07:14.85 0.6 positive manual P 255 0.1664 119 0.17 53
IV.ATCC.HNN. 2021-10-23T03:07:14.50 0.1 undecidable manual P 300 0.2005 115 -0.84 85
IV.MML1.EHZ. 2021-10-23T03:07:13.30 0.6 positive manual P 68 0.0728 142 0.24 53
IV.CESI.HHZ. 2021-10-23T03:07:13.45 0.6 positive manual P 167 0.0836 138 0.23 53
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MML1.EHE. ML:0.6 6.155E-5 0.1 AML other m 2021-10-23T03:07:15.09
IV.MML1.EHN. ML:0.5 4.325E-5 0.36 AML other m 2021-10-23T03:07:15.06
IV.CESI.HHN. ML:0.4 2.77E-5 0.34 AML other m 2021-10-23T03:07:15.43
IV.CESI.HHE. ML:0.4 2.925E-5 0.72 AML other m 2021-10-23T03:07:16.40
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