Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.9 on date 23-11-2021 and time 23:34:18 (UTC) in region 2 km E Fiordimonte (MC)

A magnitude ML 0.9 earthquake occured in region: 2 km E Fiordimonte (MC), on

  • 23-11-2021 23:34:18 (UTC)
  • 24-11-2021 00:34:18 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.0410, 13.1120 at 9 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.

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Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Fiordimonte MC 2 202 202
Pievebovigliana MC 3 866 1068
Fiastra MC 4 559 1627
Pieve Torina MC 5 1458 3085
Acquacanina MC 5 121 3206
Muccia MC 7 915 4121
Monte Cavallo MC 10 145 4266
Bolognola MC 11 142 4408
Ussita MC 11 444 4852
Camerino MC 11 6974 11826
Visso MC 12 1107 12933
Serravalle di Chienti MC 13 1070 14003
Cessapalombo MC 14 512 14515
Caldarola MC 14 1823 16338
Sarnano MC 15 3264 19602
Camporotondo di Fiastrone MC 16 563 20165
Serrapetrona MC 16 966 21131
Castelsantangelo sul Nera MC 17 281 21412
Belforte del Chienti MC 17 1886 23298
Sefro MC 18 422 23720
San Ginesio MC 18 3498 27218
Pioraco MC 19 1134 28352
Gualdo MC 19 815 29167
Preci PG 19 724 29891
Castelraimondo MC 19 4587 34478

Municipalities with at least 50000 inhabitants

An earthquake occurred to
35 Km E of Foligno (57155 inhabitants)
59 Km E of Perugia (166134 inhabitants)
64 Km NW of Teramo (54892 inhabitants)
65 Km NE of Terni (111501 inhabitants)
72 Km SW of Ancona (100861 inhabitants)
80 Km NW of L'Aquila (69753 inhabitants)
90 Km S of Fano (60888 inhabitants)
98 Km S of Pesaro (94582 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100 		ML 0.9 2021-11-23
23:34:18		 43.0413 13.1125 9 2021-11-23
23:43:51		 Sala Sismica INGV-Roma 97734361
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-11-23 23:34:18 ± 0.13
Latitude 43.0413 ± 0.0036
Longitude 13.1125 ± 0.0049
Depth (km) 9 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 97734361

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 439
Semi-minor axis of confidence ellipse (meter) 76
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 145
Circular confidence region, given by single value of horizontal uncertainty (meter) 440.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 62
Number of associated phases, regardless of their use for origin computation 17
Number of defining phases 17
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.18
Epicentral distance of station closest to the epicenter (degree) 0.01889
Epicentral distance of station farthest from the epicenter (degree) 0.24731
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 11
Magnitude information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.2
Num. used stations 4
Type of magnitude ML
Reference to an origin 97734361
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-11-23 23:43:51
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.GUMA.HHE. 2021-11-23T23:34:25.54 0.3 undecidable manual S 82 18.1707 116 0.38 68
IV.MML1.EHZ. 2021-11-23T23:34:24.10 0.3 undecidable manual S 305 13.9749 123 0.24 70
IV.PF6.EHN. 2021-11-23T23:34:23.28 0.3 undecidable manual S 32 12.5763 125 -0.19 71
IV.SNTG.HHZ. 2021-11-23T23:34:23.60 0.3 undecidable manual P 330 27.4503 108 -0.31 68
IV.NRCA.HHZ. 2021-11-23T23:34:22.72 0.6 positive manual P 180 23.0547 111 -0.35 45
IV.GUMA.HHE. 2021-11-23T23:34:22.24 0.1 undecidable manual P 82 18.1707 116 0.06 96
IV.MMO1.EHZ. 2021-11-23T23:34:22.76 1.0 positive manual P 132 23.4543 111 -0.39 22
IV.CSP1.EHZ. 2021-11-23T23:34:22.55 0.3 undecidable manual S 53 9.3795 134 -0.05 74
IV.FEMA.HNZ. 2021-11-23T23:34:22.91 0.1 undecidable manual S 210 10.1787 131 0.1 97
IV.MC2.EHZ. 2021-11-23T23:34:21.53 0.6 negative manual P 157 15.6732 120 -0.21 47
IV.FEMA.HNZ. 2021-11-23T23:34:21.03 0.3 undecidable manual P 210 10.1787 131 0.2 71
IV.PF6.EHN. 2021-11-23T23:34:21.20 0.3 undecidable manual P 32 12.5763 125 -0.01 74
IV.FDMO.HHZ. 2021-11-23T23:34:21.10 0.1 undecidable manual S 255 2.0979 167 -0.19 96
IV.MML1.EHZ. 2021-11-23T23:34:21.60 0.3 undecidable manual P 305 13.9749 123 0.17 71
IV.CSP1.EHZ. 2021-11-23T23:34:20.76 0.1 positive manual P 53 9.3795 134 0.05 98
IT.MTCL.HGZ. 2021-11-23T23:34:20.92 0.3 undecidable manual P 240 10.5783 130 0.03 74
IV.FDMO.HHZ. 2021-11-23T23:34:19.94 0.1 undecidable manual P 255 2.0979 167 -0.02 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CSP1.EHN. ML:1.2 0.0002125 1.34 AML other m 2021-11-23T23:34:23.09
IV.CSP1.EHE. ML:1.0 0.00013482379999999998 0.128 AML other m 2021-11-23T23:34:22.68
IV.MML1.EHE. ML:0.6 0.000045886275000000006 0.1152 AML other m 2021-11-23T23:34:24.83
IV.MML1.EHN. ML:0.8 0.00006274344499999999 0.256 AML other m 2021-11-23T23:34:24.67
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