Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.6 on date 25-10-2021 and time 22:56:04 (UTC) in region 2 km NE Castelsantangelo sul Nera (MC)

A magnitude ML 1.6 earthquake occured in region: 2 km NE Castelsantangelo sul Nera (MC), on

  • 25-10-2021 22:56:04 (UTC)
  • 26-10-2021 00:56:04 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.9080, 13.1690 at 11 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

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
Castelsantangelo sul Nera MC 2 281 281
Ussita MC 5 444 725
Visso MC 7 1107 1832
Bolognola MC 11 142 1974
Preci PG 11 724 2698
Montemonaco AP 13 604 3302
Acquacanina MC 14 121 3423
Norcia PG 14 4957 8380
Fiastra MC 14 559 8939
Montefortino FM 15 1178 10117
Montegallo AP 15 523 10640
Fiordimonte MC 16 202 10842
Monte Cavallo MC 17 145 10987
Amandola FM 17 3629 14616
Sarnano MC 18 3264 17880
Pieve Torina MC 18 1458 19338
Arquata del Tronto AP 18 1178 20516
Pievebovigliana MC 19 866 21382
Sellano PG 20 1079 22461

Municipalities with at least 50000 inhabitants

An earthquake occurred to
38 Km E of Foligno (57155 inhabitants)
52 Km NW of Teramo (54892 inhabitants)
57 Km NE of Terni (111501 inhabitants)
65 Km NW of L'Aquila (69753 inhabitants)
67 Km E of Perugia (166134 inhabitants)
84 Km SW of Ancona (100861 inhabitants)
91 Km W of Montesilvano (53738 inhabitants)
99 Km NW of Pescara (121014 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
Bulletin
Rev1000 		ML 1.6 2021-10-25
22:56:04		 42.9082 13.1687 11 2022-03-30
13:04:14		 Bollettino Sismico Italiano INGV 97168811
Reviewed
Rev100 		ML 1.5 2021-10-25
22:56:04		 42.9108 13.1682 10 2021-10-25
23:03:29		 Sala Sismica INGV-Roma 96989791
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-25 22:56:04 ± 0.05
Latitude 42.9082 ± 0.0027
Longitude 13.1687 ± 0.0049
Depth (km) 11 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 97168811

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 399
Semi-minor axis of confidence ellipse (meter) 289
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 247
Circular confidence region, given by single value of horizontal uncertainty (meter) 400.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 89
Number of associated phases, regardless of their use for origin computation 49
Number of defining phases 48
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.28
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.61244
Number of stations at which the event was observed 28
Number of stations from which data was used for origin computation 27
Magnitudes information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.2
Num. used stations 18
Type of magnitude ML
Reference to an origin 97168811
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-11-02 13:45:13

ML:1.5

Field Value
Value 1.5
Uncertainty 0.3
Num. used stations 26
Type of magnitude ML
Reference to an origin 96989791
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-25 23:03:29
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.POFI.HHZ. 2021-10-25T22:56:45.38 3.0 undecidable manual S 0.36 0
IV.CING.HHZ. 2021-10-25T22:56:21.46 0.1 undecidable manual S 2 51.9036 50 0.54 84
IV.TERO.HHZ. 2021-10-25T22:56:19.60 0.1 undecidable manual S 132 47.5191 50 -0.15 93
IV.RM33.EHZ. 2021-10-25T22:56:19.19 0.1 undecidable manual S 175 44.4222 50 0.26 91
IV.EL6.EHZ. 2021-10-25T22:56:19.98 0.6 undecidable manual S 353 47.0196 50 0.35 44
IV.SNTG.HHZ. 2021-10-25T22:56:18.74 0.1 undecidable manual S 334 42.7239 50 0.28 91
IV.LNSS.HHZ. 2021-10-25T22:56:17.19 0.1 undecidable manual S 197 35.4423 50 0.66 82
IV.ARVD.HHZ. 2021-10-25T22:56:16.37 0.6 positive manual P 344 67.9764 50 -0.12 45
IV.SAP2.EHZ. 2021-10-25T22:56:15.02 0.6 undecidable manual S 42 28.0497 50 0.47 45
IV.SMA1.EHN. 2021-10-25T22:56:15.64 0.3 undecidable manual S 156 33.6441 50 -0.41 67
IV.T1299.HNN. 2021-10-25T22:56:15.66 0.6 undecidable manual S 163 31.746 50 0.12 48
IV.MF5.EHZ. 2021-10-25T22:56:14.43 0.1 undecidable manual S 69 25.2525 50 0.63 85
IV.MML1.EHZ. 2021-10-25T22:56:14.48 0.1 undecidable manual S 325 27.8499 50 -0.02 98
IV.ATCC.EHZ. 2021-10-25T22:56:14.24 0.6 undecidable manual P 306 52.7028 50 0.1 46
IV.CING.HHZ. 2021-10-25T22:56:13.59 0.3 positive manual P 2 51.9036 50 -0.42 65
IV.GUMA.HHZ. 2021-10-25T22:56:13.19 0.1 undecidable manual S 38 21.867 50 0.29 94
IV.PF6.EHZ. 2021-10-25T22:56:13.49 0.3 undecidable manual S 5 25.5522 50 -0.4 68
IV.CESI.HHZ. 2021-10-25T22:56:13.72 0.1 undecidable manual S 297 23.9538 50 0.25 94
IV.OFFI.HHZ. 2021-10-25T22:56:13.06 0.6 undecidable manual P 86 42.1245 50 0.56 42
IV.RM33.EHZ. 2021-10-25T22:56:12.61 0.6 negative manual P 175 44.4222 50 -0.25 46
IV.SNTG.HHZ. 2021-10-25T22:56:12.28 0.6 undecidable manual P 334 42.7239 50 -0.31 45
IV.CSP1.EHZ. 2021-10-25T22:56:12.21 0.1 undecidable manual S 8 20.5683 50 -0.35 93
IV.EL6.EHZ. 2021-10-25T22:56:12.76 1.0 undecidable manual P 353 47.0196 50 -0.5 21
IV.MNTT.EHZ. 2021-10-25T22:56:12.32 0.3 positive manual P 64 38.628 50 0.35 67
IV.TERO.HHZ. 2021-10-25T22:56:12.99 0.6 undecidable manual P 132 47.5191 50 -0.34 44
IV.CAMP.HHE. 2021-10-25T22:56:12.51 0.3 undecidable manual P 155 45.7209 50 -0.55 63
IT.MTCL.HGZ. 2021-10-25T22:56:11.38 0.1 undecidable manual S 305 16.6722 123 -0.11 98
IV.MNTP.HNZ. 2021-10-25T22:56:11.60 0.3 undecidable manual P 44 35.2425 50 0.16 71
IV.LNSS.HHZ. 2021-10-25T22:56:11.12 0.6 positive manual P 197 35.4423 50 -0.35 45
IV.FEMA.HNZ. 2021-10-25T22:56:10.28 0.3 undecidable manual S 302 11.3775 134 0.25 72
IV.MMO1.EHZ. 2021-10-25T22:56:10.28 0.1 undecidable manual S 94 12.876 130 -0.15 98
IV.SAP2.EHZ. 2021-10-25T22:56:10.27 0.1 undecidable manual P 42 28.0497 50 -0.06 97
IV.SMA1.EHN. 2021-10-25T22:56:10.77 0.3 undecidable manual P 156 33.6441 50 -0.42 67
IV.MML1.EHZ. 2021-10-25T22:56:10.04 0.3 positive manual P 325 27.8499 50 -0.26 70
IV.FDMO.HHZ. 2021-10-25T22:56:10.99 0.1 undecidable manual S 335 15.6732 125 -0.21 97
IV.T1299.HNN. 2021-10-25T22:56:10.63 0.3 undecidable manual P 163 31.746 50 -0.27 70
IV.PF6.EHZ. 2021-10-25T22:56:09.51 0.1 undecidable manual P 5 25.5522 50 -0.44 90
IV.CESI.HHZ. 2021-10-25T22:56:09.61 0.1 negative manual P 297 23.9538 50 -0.1 97
IV.NRCA.HNZ. 2021-10-25T22:56:09.72 0.1 undecidable manual S 208 9.3795 139 0.16 99
IV.MF5.EHZ. 2021-10-25T22:56:09.85 0.3 undecidable manual P 69 25.2525 50 -0.05 74
IV.GUMA.HHZ. 2021-10-25T22:56:09.32 0.1 undecidable manual P 38 21.867 50 -0.06 99
IV.MC2.EHZ. 2021-10-25T22:56:08.94 0.3 undecidable manual S 77 1.6983 171 0.54 69
IV.FDMO.HHZ. 2021-10-25T22:56:08.22 0.1 positive manual P 335 15.6732 125 -0.18 97
IT.MTCL.HGZ. 2021-10-25T22:56:08.63 0.1 undecidable manual P 305 16.6722 123 0.06 99
IV.CSP1.EHZ. 2021-10-25T22:56:08.90 0.3 undecidable manual P 8 20.5683 50 -0.29 71
IV.MC2.EHZ. 2021-10-25T22:56:07.15 0.3 undecidable manual P 77 1.6983 171 0.37 72
IV.NRCA.HNZ. 2021-10-25T22:56:07.55 0.1 positive manual P 208 9.3795 139 0.09 100
IV.FEMA.HNZ. 2021-10-25T22:56:07.76 0.3 undecidable manual P 302 11.3775 134 0.03 76
IV.MMO1.EHZ. 2021-10-25T22:56:07.73 0.1 undecidable manual P 94 12.876 130 -0.23 97
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FDMO.HHE. ML:1.4 0.000224 0.82 AML other m 2021-10-25T22:56:11.46
IV.FDMO.HHN. ML:1.6 0.000378 0.34 AML other m 2021-10-25T22:56:11.38
IV.CSP1.EHE. ML:1.8 0.00044199999999999996 0.58 AML other m 2021-10-25T22:56:12.46
IV.CSP1.EHN. ML:1.8 0.00046350000000000004 1.04 AML other m 2021-10-25T22:56:13.26
IV.GUMA.HHE. ML:2.0 0.000622 0.36 AML other m 2021-10-25T22:56:13.47
IV.GUMA.HNN. ML:1.8 0.0004685 0.32 AML other m 2021-10-25T22:56:13.66
IV.GUMA.HNE. ML:1.9 0.0005409999999999999 1.04 AML other m 2021-10-25T22:56:13.10
IV.GUMA.HHN. ML:1.8 0.00041999999999999996 1.62 AML other m 2021-10-25T22:56:13.10
IV.MF5.EHN. ML:1.5 0.0001725 0.12 AML other m 2021-10-25T22:56:14.72
IV.MF5.EHE. ML:1.4 0.0001482 0.36 AML other m 2021-10-25T22:56:14.85
IV.MML1.EHN. ML:1.4 0.00011999999999999999 0.68 AML other m 2021-10-25T22:56:15.64
IV.MML1.EHE. ML:1.1 0.00006934999999999999 1.46 AML other m 2021-10-25T22:56:15.11
IV.LNSS.HHE. ML:1.4 0.00009115 1.1 AML other m 2021-10-25T22:56:17.76
IV.LNSS.HHN. ML:1.3 0.00008319999999999999 0.72 AML other m 2021-10-25T22:56:17.31
IV.RM33.EHN. ML:1.6 0.00011949999999999999 0.26 AML other m 2021-10-25T22:56:19.55
IV.RM33.EHE. ML:1.4 0.0000799 1.06 AML other m 2021-10-25T22:56:20.56
IV.EL6.EHE. ML:1.5 0.0000924 0.56 AML other m 2021-10-25T22:56:32.60
IV.EL6.EHN. ML:1.5 0.0000843 1.46 AML other m 2021-10-25T22:56:34.13
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