Earthquake with magnitude of ML 1.0 on date 21-10-2021 and time 16:25:49 (Italy) in region 2 km SW Muccia (MC)

A magnitude ML 1.0 earthquake occured in region: 2 km SW Muccia (MC), on

  • 21-10-2021 14:25:49 (UTC)
  • 21-10-2021 16:25:49 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.067, 13.025 at 14 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
Muccia MC 2 915 915
Pieve Torina MC 3 1458 2373
Pievebovigliana MC 5 866 3239
Serravalle di Chienti MC 6 1070 4309
Fiordimonte MC 6 202 4511
Monte Cavallo MC 8 145 4656
Camerino MC 9 6974 11630
Sefro MC 11 422 12052
Fiastra MC 11 559 12611
Acquacanina MC 13 121 12732
Pioraco MC 13 1134 13866
Fiuminata MC 16 1402 15268
Visso MC 16 1107 16375
Castelraimondo MC 16 4587 20962
Ussita MC 17 444 21406
Serrapetrona MC 18 966 22372
Caldarola MC 18 1823 24195
Bolognola MC 18 142 24337
Gagliole MC 20 620 24957
Cessapalombo MC 20 512 25469
Nocera Umbra PG 20 5839 31308

Municipalities with at least 50000 inhabitants

An earthquake occurred to
29 Km E of Foligno (57155 inhabitants)
52 Km E of Perugia (166134 inhabitants)
64 Km NE of Terni (111501 inhabitants)
72 Km NW of Teramo (54892 inhabitants)
73 Km SW of Ancona (100861 inhabitants)
85 Km NW of L'Aquila (69753 inhabitants)
86 Km S of Fano (60888 inhabitants)
94 Km S of Pesaro (94582 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 1.0 2021-10-21
14:25:49
43.0673 13.0248 14 2021-10-21
14:36:13
Sala Sismica INGV-Roma 96848431
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-21 14:25:49 ± 0.07
Latitude 43.0673 ± 0.0027
Longitude 13.0248 ± 0.0037
Depth (km) 14 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 96848431

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 314
Semi-minor axis of confidence ellipse (meter) 158
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 48
Circular confidence region, given by single value of horizontal uncertainty (meter) 310
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 142
Number of associated phases, regardless of their use for origin computation 11
Number of defining phases 11
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.1
Epicentral distance of station closest to the epicenter (degree) 0.05486
Epicentral distance of station farthest from the epicenter (degree) 0.24282
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 7
Magnitude information

ML:1

Field Value
Value 1
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 96848431
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-21 14:36:13
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.NRCA.HHZ. 2021-10-21T14:25:59.52 0.3 undecidable manual S 164 0.2428 100 -0.09 71
IV.NRCA.HHZ. 2021-10-21T14:25:55.37 0.1 undecidable manual P 164 0.2428 100 -0.14 94
IV.CESI.HHZ. 2021-10-21T14:25:55.84 0.3 undecidable manual S 235 0.1079 126 -0.03 74
IV.MC2.EHZ. 2021-10-21T14:25:54.85 0.1 undecidable manual P 142 0.197 104 0.11 96
IV.FDMO.HHZ. 2021-10-21T14:25:54.79 0.3 undecidable manual S 124 0.0549 149 -0.03 75
IV.SNTG.HHZ. 2021-10-21T14:25:54.66 0.1 undecidable manual P 342 0.197 104 -0.09 96
IV.MML1.EHZ. 2021-10-21T14:25:54.84 0.3 undecidable manual S 320 0.0603 147 -0.06 74
IV.CESI.HHZ. 2021-10-21T14:25:53.39 0.1 undecidable manual P 235 0.1079 126 0.04 98
IV.FDMO.HHZ. 2021-10-21T14:25:52.87 0.1 undecidable manual P 124 0.0549 149 0.13 98
IT.MTCL.HGZ. 2021-10-21T14:25:52.95 0.1 undecidable manual P 194 0.0755 140 0 100
IV.MML1.EHZ. 2021-10-21T14:25:52.87 0.1 undecidable manual P 320 0.0603 147 0.08 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FDMO.HHE. ML:1.1 0.000141 1.84 AML other m 2021-10-21T14:25:54.94
IV.MML1.EHE. ML:0.9 8.405E-5 0.44 AML other m 2021-10-21T14:25:55.24
IV.FDMO.HHN. ML:1.3 0.0002285 0.12 AML other m 2021-10-21T14:25:55.05
IV.MML1.EHN. ML:0.8 7.345E-5 0.26 AML other m 2021-10-21T14:25:55.23
IV.CESI.HHN. ML:1 9.77E-5 1.84 AML other m 2021-10-21T14:25:56.94
IV.CESI.HHE. ML:0.8 6.655E-5 1.62 AML other m 2021-10-21T14:25:56.14
IV.NRCA.HHN. ML:1.1 6.645E-5 0.12 AML other m 2021-10-21T14:25:59.95
IV.NRCA.HHE. ML:0.9 3.93E-5 0.12 AML other m 2021-10-21T14:25:59.92
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