Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.6 on date 20-10-2021 and time 03:52:32 (Italy) in region 2 km N Monte Cavallo (MC)

A magnitude ML 1.6 earthquake occured in region: 2 km N Monte Cavallo (MC), on

  • 20-10-2021 01:52:32 (UTC)
  • 20-10-2021 03:52:32 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.0080, 13.0070 at 12 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
Monte Cavallo MC 2 145 145
Pieve Torina MC 6 1458 1603
Fiordimonte MC 8 202 1805
Serravalle di Chienti MC 8 1070 2875
Pievebovigliana MC 9 866 3741
Muccia MC 9 915 4656
Visso MC 11 1107 5763
Fiastra MC 13 559 6322
Ussita MC 13 444 6766
Acquacanina MC 14 121 6887
Preci PG 15 724 7611
Sellano PG 15 1079 8690
Camerino MC 15 6974 15664
Sefro MC 16 422 16086
Castelsantangelo sul Nera MC 17 281 16367
Bolognola MC 18 142 16509
Pioraco MC 19 1134 17643

Municipalities with at least 50000 inhabitants

An earthquake occurred to
25 Km E of Foligno (57155 inhabitants)
51 Km E of Perugia (166134 inhabitants)
58 Km NE of Terni (111501 inhabitants)
69 Km NW of Teramo (54892 inhabitants)
80 Km SW of Ancona (100861 inhabitants)
80 Km NW of L'Aquila (69753 inhabitants)
93 Km S of Fano (60888 inhabitants)
99 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
Bulletin
Rev1000 		ML 1.6 2021-10-20
01:52:32		 43.0082 13.0068 12 2022-03-30
13:04:26		 Bollettino Sismico Italiano INGV 99285481
Reviewed
Rev100 		ML 1.8 2021-10-20
01:52:26		 42.8472 13.257 11 2021-10-20
02:01:00		 Sala Sismica INGV-Roma 96780511
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-20 01:52:32 ± 0.05
Latitude 43.0082 ± 0.0027
Longitude 13.0068 ± 0.0037
Depth (km) 12 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 99285481

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 337
Semi-minor axis of confidence ellipse (meter) 140
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 49
Circular confidence region, given by single value of horizontal uncertainty (meter) 340.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 45
Number of associated phases, regardless of their use for origin computation 55
Number of defining phases 48
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.23
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.67719
Number of stations at which the event was observed 31
Number of stations from which data was used for origin computation 26
Magnitudes information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.3
Num. used stations 48
Type of magnitude ML
Reference to an origin 99285481
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-01-03 15:32:25

ML:1.8

Field Value
Value 1.8
Uncertainty 0.4
Num. used stations 48
Type of magnitude ML
Reference to an origin 96780511
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-20 02:01:00
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.NARO.HHZ. 2021-10-20T01:52:55.80 0.6 undecidable manual S 333 75.1692 91 0.93 33
IV.PIEI.HHZ. 2021-10-20T01:52:54.41 0.3 undecidable manual S 327 69.8745 91 0.97 50
IV.FRON.EHZ. 2021-10-20T01:52:51.44 0.3 undecidable manual S 338 60.8946 91 0.38 63
IV.ARVD.HHZ. 2021-10-20T01:52:49.88 0.3 undecidable manual S 354 54.6009 91 0.5 62
IV.SSFR.HHZ. 2021-10-20T01:52:48.86 0.3 undecidable manual S 339 50.8158 92 0.49 63
IV.CING.HHZ. 2021-10-20T01:52:46.66 0.3 undecidable manual S 20 43.5231 92 0.24 67
IV.NARO.HHZ. 2021-10-20T01:52:45.11 0.3 undecidable manual P 333 75.1692 91 -0.24 62
IV.PIEI.HHZ. 2021-10-20T01:52:44.39 0.3 undecidable manual P 327 69.8745 91 -0.13 64
IV.ATPI.EHZ. 2021-10-20T01:52:44.57 3.0 negative manual P -0.31 0
IV.ATCC.EHZ. 2021-10-20T01:52:44.71 0.3 undecidable manual S 304 35.6421 93 0.4 66
IV.EL6.EHZ. 2021-10-20T01:52:44.51 0.3 undecidable manual S 12 36.4413 93 -0.02 70
IV.FOSV.EHZ. 2021-10-20T01:52:44.79 0.3 undecidable manual S 328 37.5291 92 -0.03 70
IV.ASSB.HHZ. 2021-10-20T01:52:42.34 0.3 undecidable manual S 278 28.4493 94 -0.07 70
IV.MMO1.EHZ. 2021-10-20T01:52:42.47 0.3 undecidable manual S 115 28.6491 94 0.01 71
IV.GUMA.HHZ. 2021-10-20T01:52:42.55 0.3 undecidable manual S 77 27.3504 94 0.45 65
IV.FRON.EHZ. 2021-10-20T01:52:42.86 0.1 undecidable manual P 338 60.8946 91 -0.29 84
IV.SSFR.HHZ. 2021-10-20T01:52:41.44 0.3 undecidable manual P 339 50.8158 92 -0.16 66
IV.MNTT.EHZ. 2021-10-20T01:52:41.82 3.0 undecidable manual S 0.59 0
IV.MURB.HHZ. 2021-10-20T01:52:41.14 0.1 positive manual P 306 48.2184 92 -0.05 91
IV.ARVD.HHZ. 2021-10-20T01:52:41.93 0.3 undecidable manual P 354 54.6009 91 -0.25 65
IV.SNTG.HHZ. 2021-10-20T01:52:41.90 0.1 undecidable manual S 349 27.9498 94 -0.36 88
IV.ATFO.HHZ. 2021-10-20T01:52:41.84 0.1 undecidable manual P 319 53.1024 92 -0.11 89
IV.NRCA.HHZ. 2021-10-20T01:52:40.37 0.1 undecidable manual S 156 21.2676 97 -0.12 94
IV.CING.HHZ. 2021-10-20T01:52:40.36 0.3 undecidable manual P 20 43.5231 92 -0.11 68
IV.MOMA.HHZ. 2021-10-20T01:52:40.44 0.3 undecidable manual P 238 42.1245 92 0.19 68
IV.PF6.EHN. 2021-10-20T01:52:40.07 0.3 undecidable manual S 47 20.9679 98 -0.33 68
IV.EL6.EHZ. 2021-10-20T01:52:39.23 0.1 undecidable manual P 12 36.4413 93 -0.15 91
IV.MC2.EHZ. 2021-10-20T01:52:39.95 0.1 undecidable manual S 126 18.2706 101 0.25 92
IV.CSP1.EHE. 2021-10-20T01:52:39.68 0.3 undecidable manual S 60 18.5703 100 -0.09 71
IV.MF5.EHZ. 2021-10-20T01:52:39.71 0.3 undecidable manual P 93 36.8298 93 0.27 67
IV.FOSV.EHZ. 2021-10-20T01:52:39.31 0.1 positive manual P 328 37.5291 92 -0.23 89
IV.ATCC.EHZ. 2021-10-20T01:52:39.13 0.1 positive manual P 304 35.6421 93 -0.12 92
IV.MMO1.EHZ. 2021-10-20T01:52:38.02 0.1 undecidable manual P 115 28.6491 94 -0.16 92
IV.GUMA.HHZ. 2021-10-20T01:52:38.10 0.1 undecidable manual P 77 27.3504 94 0.13 94
IV.LNSS.HHZ. 2021-10-20T01:52:38.38 3.0 undecidable manual S 0.52 0
IV.SNTG.HHZ. 2021-10-20T01:52:37.82 0.1 undecidable manual P 349 27.9498 94 -0.25 91
IV.FEMA.HNE. 2021-10-20T01:52:37.10 0.1 undecidable manual S 146 6.1938 145 0.13 97
IV.ASSB.HHZ. 2021-10-20T01:52:37.97 0.1 positive manual P 278 28.4493 94 -0.19 92
IV.MML1.HNE. 2021-10-20T01:52:37.86 0.1 undecidable manual S 346 11.9769 119 -0.27 93
IV.CESI.HHZ. 2021-10-20T01:52:37.41 0.1 undecidable manual S 268 8.2806 135 0.08 98
IV.PF6.EHN. 2021-10-20T01:52:36.83 0.3 undecidable manual P 47 20.9679 98 -0.17 70
IV.FDMO.HHN. 2021-10-20T01:52:36.98 0.1 undecidable manual S 64 7.2927 140 -0.16 96
IV.MC2.EHZ. 2021-10-20T01:52:36.67 0.1 undecidable manual P 126 18.2706 101 0.08 96
IV.CSP1.EHE. 2021-10-20T01:52:36.62 0.3 undecidable manual P 60 18.5703 100 -0.01 73
IT.MTCL.HGZ. 2021-10-20T01:52:36.39 0.1 undecidable manual S 201 1.6983 170 -0.12 98
IV.NRCA.HHZ. 2021-10-20T01:52:36.92 0.1 undecidable manual P 156 21.2676 97 -0.12 94
IV.CESI.HHZ. 2021-10-20T01:52:35.35 0.1 positive manual P 268 8.2806 135 0.13 97
IV.SMA1.EHZ. 2021-10-20T01:52:35.80 3.0 undecidable manual S -0.06 0
IV.FEMA.HNE. 2021-10-20T01:52:35.19 0.1 undecidable manual P 146 6.1938 145 0.18 96
IV.FDMO.HHN. 2021-10-20T01:52:35.09 0.1 undecidable manual P 64 7.2927 140 -0.02 99
IV.MML1.HNE. 2021-10-20T01:52:35.62 0.1 negative manual P 346 11.9769 119 -0.06 97
IT.MTCL.HGZ. 2021-10-20T01:52:34.76 0.1 negative manual P 201 1.6983 170 0.01 100
IV.TERO.HHZ. 2021-10-20T01:52:33.79 3.0 undecidable manual P -3.08 0
IV.LNSS.HHZ. 2021-10-20T01:52:32.83 3.0 undecidable manual P -0.31 0
IV.SMA1.EHZ. 2021-10-20T01:52:31.66 3.0 positive manual P -0.32 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHE. ML:1.4 0.0001565 0.16 AML other m 2021-10-20T01:52:32.37
IV.NRCA.HHN. ML:1.5 0.000194 0.08 AML other m 2021-10-20T01:52:32.42
IV.FDMO.HHE. ML:1.9 0.0011149999999999999 1.8 AML other m 2021-10-20T01:52:37.08
IV.FEMA.HNN. ML:2.0 0.001265 1.18 AML other m 2021-10-20T01:52:37.16
IV.FDMO.HHN. ML:1.9 0.0009765 0.12 AML other m 2021-10-20T01:52:37.35
IV.FEMA.HNE. ML:2.0 0.001345 0.4 AML other m 2021-10-20T01:52:37.19
IV.CESI.HHE. ML:2.2 0.001965 0.14 AML other m 2021-10-20T01:52:37.55
IV.CESI.HHN. ML:2.4 0.00271 0.14 AML other m 2021-10-20T01:52:37.62
IV.CESI.HNE. ML:2.1 0.001665 0.14 AML other m 2021-10-20T01:52:37.56
IV.CESI.HNN. ML:2.3 0.002565 0.14 AML other m 2021-10-20T01:52:37.63
IV.MML1.EHN. ML:1.8 0.000603 0.48 AML other m 2021-10-20T01:52:38.00
IV.MML1.HNN. ML:1.7 0.0005935000000000001 1.28 AML other m 2021-10-20T01:52:38.00
IV.MML1.HNE. ML:1.8 0.0006599999999999999 0.98 AML other m 2021-10-20T01:52:38.22
IV.MML1.EHE. ML:1.8 0.000701 0.98 AML other m 2021-10-20T01:52:38.22
IV.CSP1.EHN. ML:2.3 0.001385 1.04 AML other m 2021-10-20T01:52:40.81
IV.CSP1.EHE. ML:2.3 0.0015899999999999998 0.4 AML other m 2021-10-20T01:52:40.39
IV.SNTG.HHE. ML:1.5 0.00016149999999999997 0.14 AML other m 2021-10-20T01:52:42.15
IV.ASSB.HHN. ML:1.6 0.000175 0.2 AML other m 2021-10-20T01:52:42.49
IV.GUMA.HNN. ML:1.9 0.0004065 0.24 AML other m 2021-10-20T01:52:42.81
IV.SNTG.HHN. ML:1.5 0.00016399999999999997 1.06 AML other m 2021-10-20T01:52:42.18
IV.GUMA.HNE. ML:1.7 0.00026250000000000004 1 AML other m 2021-10-20T01:52:42.27
IV.ASSB.HHE. ML:1.4 0.000135 0.46 AML other m 2021-10-20T01:52:42.55
IV.GUMA.HHE. ML:2.0 0.000521 0.22 AML other m 2021-10-20T01:52:42.78
IV.GUMA.HHN. ML:1.8 0.0003565 0.2 AML other m 2021-10-20T01:52:42.81
IV.ATCC.EHE. ML:1.3 0.00007015 0.44 AML other m 2021-10-20T01:52:44.75
IV.FOSV.EHE. ML:1.3 0.00006755 1.64 AML other m 2021-10-20T01:52:44.05
IV.EL6.EHE. ML:1.7 0.000182 0.12 AML other m 2021-10-20T01:52:45.04
IV.ATCC.EHN. ML:1.3 0.00007795 0.12 AML other m 2021-10-20T01:52:45.28
IV.EL6.EHN. ML:1.8 0.000209 0.18 AML other m 2021-10-20T01:52:45.47
IV.FOSV.EHN. ML:1.3 0.00007350000000000001 0.94 AML other m 2021-10-20T01:52:45.10
IV.CING.HHN. ML:1.2 0.0000506 1.42 AML other m 2021-10-20T01:52:47.16
IV.CING.HHE. ML:1.4 0.0000811 1.3 AML other m 2021-10-20T01:52:47.82
IV.LNSS.HHN. ML:1.4 0.00006520000000000001 0.28 AML other m 2021-10-20T01:52:47.56
IV.LNSS.HHE. ML:1.4 0.00007795 0.2 AML other m 2021-10-20T01:52:47.58
IV.MOMA.HHN. ML:1.3 0.000061 1.08 AML other m 2021-10-20T01:52:47.29
IV.MOMA.HHE. ML:1.5 0.00010085 0.22 AML other m 2021-10-20T01:52:47.92
IV.MURB.HHN. ML:1.4 0.00007155 0.82 AML other m 2021-10-20T01:52:49.40
IV.SSFR.HHN. ML:1.6 0.00009025 1.28 AML other m 2021-10-20T01:52:49.66
IV.MURB.HHE. ML:1.4 0.00006955 0.24 AML other m 2021-10-20T01:52:49.84
IV.ARVD.HHE. ML:1.2 0.000038400000000000005 0.18 AML other m 2021-10-20T01:52:50.37
IV.SSFR.HHE. ML:1.6 0.00009255 0.18 AML other m 2021-10-20T01:52:50.88
IV.ARVD.HHN. ML:1.1 0.000032500000000000004 0.48 AML other m 2021-10-20T01:52:51.25
IV.FRON.EHN. ML:1.3 0.00004025 0.14 AML other m 2021-10-20T01:52:51.77
IV.MNTT.EHE. ML:1.7 0.00015 0.56 AML other m 2021-10-20T01:52:52.08
IV.FRON.EHE. ML:1.1 0.00002555 1.18 AML other m 2021-10-20T01:52:52.85
IV.MNTT.EHN. ML:1.6 0.0001147 0.32 AML other m 2021-10-20T01:52:53.88
IV.PIEI.HHE. ML:1.1 0.00001915 0.14 AML other m 2021-10-20T01:52:55.03
IV.PIEI.HHN. ML:1.0 0.00001529 0.48 AML other m 2021-10-20T01:52:56.32
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