Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.9 on date 25-09-2021 and time 22:52:18 (Italy) in region Monte Cavallo (MC)

A magnitude ML 0.9 earthquake occured in region: Monte Cavallo (MC), on

  • 25-09-2021 20:52:18 (UTC)
  • 25-09-2021 22:52:18 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.9910, 13.0030 at 12 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
Monte Cavallo MC 0 145 145
Pieve Torina MC 7 1458 1603
Fiordimonte MC 9 202 1805
Visso MC 10 1107 2912
Serravalle di Chienti MC 10 1070 3982
Pievebovigliana MC 11 866 4848
Muccia MC 11 915 5763
Ussita MC 12 444 6207
Preci PG 13 724 6931
Sellano PG 13 1079 8010
Fiastra MC 14 559 8569
Acquacanina MC 15 121 8690
Castelsantangelo sul Nera MC 16 281 8971
Camerino MC 17 6974 15945
Sefro MC 18 422 16367
Bolognola MC 18 142 16509

Municipalities with at least 50000 inhabitants

An earthquake occurred to
25 Km E of Foligno (57155 inhabitants)
52 Km E of Perugia (166134 inhabitants)
56 Km NE of Terni (111501 inhabitants)
68 Km NW of Teramo (54892 inhabitants)
78 Km NW of L'Aquila (69753 inhabitants)
81 Km SW of Ancona (100861 inhabitants)
95 Km S of Fano (60888 inhabitants)
97 Km NE of Viterbo (67173 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 2021-09-25
20:52:18		 42.9908 13.0033 12 2021-09-25
21:21:58		 Sala Sismica INGV-Roma 95879341
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-25 20:52:18 ± 0.08
Latitude 42.9908 ± 0.0036
Longitude 13.0033 ± 0.0061
Depth (km) 12 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 95879341

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 532
Semi-minor axis of confidence ellipse (meter) 122
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 274
Circular confidence region, given by single value of horizontal uncertainty (meter) 530.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 98
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) 0.2
Epicentral distance of station closest to the epicenter (degree) 0.00450
Epicentral distance of station farthest from the epicenter (degree) 0.30847
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 9
Magnitude information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.4
Num. used stations 18
Type of magnitude ML
Reference to an origin 95879341
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-25 21:21:58
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.SNTG.HHZ. 2021-09-25T20:52:29.12 0.3 undecidable manual S 350 29.748 91 0.1 71
IV.ASSB.HHZ. 2021-09-25T20:52:28.15 0.6 undecidable manual S 282 28.5492 92 -0.54 44
IV.NRCA.HNZ. 2021-09-25T20:52:26.31 0.3 undecidable manual S 153 19.6692 94 -0.01 74
IV.CSP1.EHZ. 2021-09-25T20:52:26.36 0.3 undecidable manual S 55 19.869 94 -0.01 73
IV.SNTG.HHZ. 2021-09-25T20:52:24.52 0.3 undecidable manual P 350 29.748 91 -0.1 71
IV.MML1.EHZ. 2021-09-25T20:52:24.57 0.3 undecidable manual S 349 13.875 105 -0.22 71
IV.GAVE.EHZ. 2021-09-25T20:52:24.83 0.6 positive manual P 195 34.2435 91 -0.49 44
IV.ASSB.HHZ. 2021-09-25T20:52:24.94 0.6 undecidable manual P 282 28.5492 92 0.5 43
IV.CSP1.EHZ. 2021-09-25T20:52:23.26 0.6 undecidable manual P 55 19.869 94 0.17 48
IV.CESI.HHZ. 2021-09-25T20:52:23.55 0.3 undecidable manual S 281 8.1807 132 0.08 74
IV.NRCA.HNZ. 2021-09-25T20:52:23.12 0.3 undecidable manual P 153 19.6692 94 0.05 73
IV.FDMO.HHZ. 2021-09-25T20:52:23.38 0.3 undecidable manual S 53 8.4804 130 -0.15 72
IT.MTCL.HGZ. 2021-09-25T20:52:22.52 0.3 undecidable manual S 318 0.4995 177 -0.05 75
IV.MML1.EHZ. 2021-09-25T20:52:22.34 0.3 undecidable manual P 349 13.875 105 0.16 72
IV.FDMO.HHZ. 2021-09-25T20:52:21.45 0.1 undecidable manual P 53 8.4804 130 0 100
IV.CESI.HHZ. 2021-09-25T20:52:21.66 0.1 negative manual P 281 8.1807 132 0.24 95
IT.MTCL.HGZ. 2021-09-25T20:52:21.04 0.3 undecidable manual P 318 0.4995 177 0.14 74
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CESI.HHN. ML:0.8 0.00009183046 0.1536 AML other m 2021-09-25T20:52:23.80
IV.CESI.HHE. ML:0.9 0.00010662732 0.064 AML other m 2021-09-25T20:52:23.82
IV.MML1.EHN. ML:0.4 0.000024851541 0.1536 AML other m 2021-09-25T20:52:24.95
IV.MML1.EHE. ML:0.3 0.00001925967 0.1152 AML other m 2021-09-25T20:52:25.18
IV.GAVE.EHE. ML:0.9 0.00003535 0.78 AML other m 2021-09-25T20:52:34.27
IV.GAVE.EHN. ML:0.9 0.0000315 0.06 AML other m 2021-09-25T20:52:34.67
IV.CESI.HNE. ML:0.9 0.00009894489500000001 0.064 AML other m 2021-09-25T20:52:23.83
IV.CESI.HNN. ML:1.1 0.00017253883 0.4992 AML other m 2021-09-25T20:52:27.19
IV.MML1.HNE. ML:1.0 0.00009724666999999999 0.768 AML other m 2021-09-25T20:52:32.23
IV.MML1.HNN. ML:1.0 0.00009139564 0.6528 AML other m 2021-09-25T20:52:24.56
IV.CSP1.EHE. ML:0.6 0.000029736669999999997 0.1536 AML other m 2021-09-25T20:52:26.64
IV.CSP1.EHN. ML:0.7 0.000036254845 0.2176 AML other m 2021-09-25T20:52:26.44
IV.SNTG.HHE. ML:0.0 0.000005276068 0.2944 AML other m 2021-09-25T20:52:29.16
IV.SNTG.HHN. ML:0.0 0.00000434473445 0.4736 AML other m 2021-09-25T20:52:28.30
IV.SNTG.HNE. ML:1.4 0.0001223733 0.5888 AML other m 2021-09-25T20:52:40.00
IV.SNTG.HNN. ML:1.2 0.00007615299 0.64 AML other m 2021-09-25T20:52:37.40
IV.GAVE.HNE. ML:1.5 0.00011888361 0.6912 AML other m 2021-09-25T20:52:26.30
IV.GAVE.HNN. ML:1.6 0.00017541297 0.704 AML other m 2021-09-25T20:52:40.54
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