Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.5 on date 18-09-2021 and time 03:43:13 (Italy) in region 4 km NW Monte Cavallo (MC)

A magnitude ML 1.5 earthquake occured in region: 4 km NW Monte Cavallo (MC), on

  • 18-09-2021 01:43:13 (UTC)
  • 18-09-2021 03:43:13 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.0270, 12.9730 at 13 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 4 145 145
Serravalle di Chienti MC 5 1070 1215
Pieve Torina MC 7 1458 2673
Muccia MC 9 915 3588
Fiordimonte MC 10 202 3790
Pievebovigliana MC 10 866 4656
Sefro MC 14 422 5078
Visso MC 14 1107 6185
Camerino MC 14 6974 13159
Fiastra MC 15 559 13718
Sellano PG 16 1079 14797
Ussita MC 16 444 15241
Acquacanina MC 16 121 15362
Pioraco MC 17 1134 16496
Preci PG 17 724 17220
Nocera Umbra PG 18 5839 23059
Valtopina PG 18 1398 24457
Fiuminata MC 18 1402 25859

Municipalities with at least 50000 inhabitants

An earthquake occurred to
23 Km E of Foligno (57155 inhabitants)
48 Km E of Perugia (166134 inhabitants)
58 Km NE of Terni (111501 inhabitants)
72 Km NW of Teramo (54892 inhabitants)
79 Km SW of Ancona (100861 inhabitants)
83 Km NW of L'Aquila (69753 inhabitants)
91 Km S of Fano (60888 inhabitants)
98 Km NE of Viterbo (67173 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
Bulletin
Rev1000 		ML 1.5 2021-09-18
01:43:13		 43.0272 12.9733 13 2022-03-30
13:04:07		 Bollettino Sismico Italiano INGV 95662101
Reviewed
Rev100 		ML 1.5 2021-09-18
01:43:13		 43.0267 12.9793 11 2021-09-18
01:48:49		 Sala Sismica INGV-Roma 95563871
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-18 01:43:13 ± 0.05
Latitude 43.0272 ± 0.0027
Longitude 12.9733 ± 0.0037
Depth (km) 13 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 95662101

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 296
Semi-minor axis of confidence ellipse (meter) 212
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 78
Circular confidence region, given by single value of horizontal uncertainty (meter) 300.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 44
Number of associated phases, regardless of their use for origin computation 48
Number of defining phases 47
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.22
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.64931
Number of stations at which the event was observed 29
Number of stations from which data was used for origin computation 28
Magnitudes information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.2
Num. used stations 28
Type of magnitude ML
Reference to an origin 95662101
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-09-20 11:52:16

ML:1.5

Field Value
Value 1.5
Uncertainty 0.2
Num. used stations 28
Type of magnitude ML
Reference to an origin 95563871
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-18 01:48:49
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.BRSN.EHZ. 2021-09-18T01:43:57.61 3.0 undecidable manual S 0.45 0
IV.FRON.EHZ. 2021-09-18T01:43:31.45 0.3 undecidable manual S 340 57.9975 92 0.22 66
IV.ARVD.HHZ. 2021-09-18T01:43:30.50 0.1 undecidable manual S 357 52.3032 92 0.79 74
IV.ATFO.HHZ. 2021-09-18T01:43:29.14 0.3 undecidable manual S 319 49.7169 92 0.11 69
IV.LNSS.HHZ. 2021-09-18T01:43:28.47 0.3 undecidable manual S 173 47.4192 93 0.07 70
IV.SSFR.HHZ. 2021-09-18T01:43:28.91 0.3 undecidable manual S 341 47.9187 93 0.36 65
IV.MOMA.HHZ. 2021-09-18T01:43:27.44 0.1 undecidable manual S 233 41.0256 93 0.72 81
IV.CING.HHZ. 2021-09-18T01:43:27.27 0.1 undecidable manual S 25 42.624 93 0.14 91
IV.MPAG.EHZ. 2021-09-18T01:43:25.06 0.3 undecidable manual P 346 68.9754 92 -0.28 64
IV.EL6.EHZ. 2021-09-18T01:43:25.20 0.1 undecidable manual S 17 35.0427 94 0.07 94
IV.NARO.HHZ. 2021-09-18T01:43:25.49 0.3 undecidable manual P 334 72.0723 91 -0.33 63
IV.MMO1.EHZ. 2021-09-18T01:43:24.25 0.1 undecidable manual S 116 32.0457 95 -0.05 96
IV.ATCC.EHZ. 2021-09-18T01:43:24.48 0.1 undecidable manual S 303 32.1456 95 0.12 94
IV.FRON.EHZ. 2021-09-18T01:43:23.30 0.3 undecidable manual P 340 57.9975 92 -0.35 64
IV.ATFO.HHZ. 2021-09-18T01:43:22.30 0.1 undecidable manual P 319 49.7169 92 -0.08 92
IV.NRCA.HHZ. 2021-09-18T01:43:22.12 0.3 undecidable manual S 152 24.3534 98 -0.15 71
IV.ARVD.HHZ. 2021-09-18T01:43:22.56 0.1 undecidable manual P 357 52.3032 92 -0.21 89
IV.MNTT.EHZ. 2021-09-18T01:43:22.87 0.3 undecidable manual P 85 50.616 92 0.36 65
IV.SNTG.HHZ. 2021-09-18T01:43:22.44 0.3 undecidable manual S 354 25.4523 97 -0.11 72
IV.SMA1.EHZ. 2021-09-18T01:43:22.63 0.3 undecidable manual P 146 52.9026 92 -0.24 66
IV.ASSB.HHZ. 2021-09-18T01:43:22.40 0.3 undecidable manual S 274 25.5522 97 -0.2 70
IV.MC2.EHZ. 2021-09-18T01:43:21.98 0.1 undecidable manual S 126 21.6672 100 0.4 90
IV.CING.HHZ. 2021-09-18T01:43:21.19 0.1 positive manual P 25 42.624 93 -0.09 93
IV.MF5.EHZ. 2021-09-18T01:43:21.00 0.3 undecidable manual P 96 39.7269 93 0.17 69
IV.LNSS.HHZ. 2021-09-18T01:43:21.84 0.3 undecidable manual P 173 47.4192 93 -0.17 90
IV.CSP1.EHZ. 2021-09-18T01:43:21.18 0.3 undecidable manual S 69 20.0688 102 0.03 97
IV.MOMA.HHZ. 2021-09-18T01:43:21.06 0.3 undecidable manual P 233 41.0256 93 0.02 71
IV.SSFR.HHZ. 2021-09-18T01:43:21.80 0.3 undecidable manual P 341 47.9187 93 -0.3 66
IV.MURB.HHZ. 2021-09-18T01:43:21.55 0.1 undecidable manual P 306 44.7219 93 -0.06 93
IV.GAVE.EHZ. 2021-09-18T01:43:20.48 0.1 undecidable manual P 190 37.7289 94 -0.05 94
IV.EL6.EHZ. 2021-09-18T01:43:20.00 0.1 positive manual P 17 35.0427 94 -0.12 94
IV.MMO1.EHZ. 2021-09-18T01:43:19.57 0.1 positive manual P 116 32.0457 95 -0.08 95
IV.ATCC.EHZ. 2021-09-18T01:43:19.59 0.1 positive manual P 303 32.1456 95 -0.09 94
IV.ASSB.HHZ. 2021-09-18T01:43:18.53 0.1 negative manual P 274 25.5522 97 -0.13 94
IV.CESI.HHZ. 2021-09-18T01:43:18.10 0.1 undecidable manual S 246 6.0939 147 0.09 99
IV.MC2.EHZ. 2021-09-18T01:43:18.16 0.1 undecidable manual P 126 21.6672 100 0.09 97
IV.MML1.EHZ. 2021-09-18T01:43:18.54 0.1 undecidable manual S 359 9.5793 131 -0.08 100
IV.NRCA.HHZ. 2021-09-18T01:43:18.41 0.1 positive manual P 152 24.3534 98 -0.06 96
IV.FDMO.HHN. 2021-09-18T01:43:18.36 0.1 undecidable manual S 84 9.2796 133 -0.2 98
IV.SNTG.HHZ. 2021-09-18T01:43:18.33 0.1 undecidable manual P 354 25.4523 97 -0.31 92
IT.MTCL.HGZ. 2021-09-18T01:43:17.56 0.1 undecidable manual S 150 4.2957 156 -0.22 98
IV.CSP1.EHZ. 2021-09-18T01:43:17.57 0.3 undecidable manual P 69 20.0688 102 -0.26 70
IV.FDMO.HHN. 2021-09-18T01:43:16.33 0.1 undecidable manual P 84 9.2796 133 0 100
IV.SEF1.HNN. 2021-09-18T01:43:16.80 0.1 negative manual P 351 13.4754 117 -0.06 99
IV.CESI.HHZ. 2021-09-18T01:43:16.15 0.1 negative manual P 246 6.0939 147 0.14 98
IV.MML1.EHZ. 2021-09-18T01:43:16.39 0.1 undecidable manual P 359 9.5793 131 0.03 99
IV.FEMA.HNE. 2021-09-18T01:43:16.55 0.1 undecidable manual P 139 9.4794 132 0.19 96
IT.MTCL.HGZ. 2021-09-18T01:43:15.94 0.1 positive manual P 150 4.2957 156 0.06 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CESI.HHN. ML:1.6 0.00046750000000000003 0.38 AML other m 2021-09-18T01:43:18.30
IV.CESI.HHE. ML:1.7 0.000689 0.34 AML other m 2021-09-18T01:43:18.18
IV.MML1.EHN. ML:1.7 0.000608 0.52 AML other m 2021-09-18T01:43:18.72
IV.MML1.HNN. ML:1.7 0.0006134999999999999 0.08 AML other m 2021-09-18T01:43:18.72
IV.MML1.HNE. ML:1.8 0.0007685 0.12 AML other m 2021-09-18T01:43:18.78
IV.MML1.EHE. ML:1.8 0.0007709999999999999 0.12 AML other m 2021-09-18T01:43:18.84
IV.CSP1.EHE. ML:1.4 0.00017754999999999998 1 AML other m 2021-09-18T01:43:22.37
IV.NRCA.HHN. ML:1.9 0.000458 0.12 AML other m 2021-09-18T01:43:22.43
IV.CSP1.EHN. ML:1.5 0.00021050000000000002 0.46 AML other m 2021-09-18T01:43:22.68
IV.ASSB.HHN. ML:1.5 0.00016149999999999997 0.16 AML other m 2021-09-18T01:43:22.61
IV.NRCA.HHE. ML:1.7 0.000273 1.1 AML other m 2021-09-18T01:43:22.74
IV.ASSB.HHE. ML:1.4 0.0001505 0.44 AML other m 2021-09-18T01:43:22.68
IV.SNTG.HHE. ML:1.2 0.00007944999999999999 1.14 AML other m 2021-09-18T01:43:23.64
IV.SNTG.HHN. ML:1.1 0.00007605 1.02 AML other m 2021-09-18T01:43:23.01
IV.ATCC.EHE. ML:1.7 0.000193 0.16 AML other m 2021-09-18T01:43:24.73
IV.ATCC.EHN. ML:1.5 0.000124 1.84 AML other m 2021-09-18T01:43:25.07
IV.EL6.EHE. ML:1.6 0.0001655 0.82 AML other m 2021-09-18T01:43:25.51
IV.EL6.EHN. ML:1.6 0.00015000000000000001 0.2 AML other m 2021-09-18T01:43:26.09
IV.GAVE.EHE. ML:1.4 0.00010115 0.5 AML other m 2021-09-18T01:43:26.87
IV.GAVE.EHN. ML:1.3 0.0000726 1 AML other m 2021-09-18T01:43:27.65
IV.CING.HHN. ML:1.2 0.00004965 1.18 AML other m 2021-09-18T01:43:28.64
IV.CING.HHE. ML:1.2 0.000045350000000000005 1.28 AML other m 2021-09-18T01:43:28.81
IV.MURB.HHE. ML:1.5 0.00010185 0.24 AML other m 2021-09-18T01:43:29.55
IV.SSFR.HHE. ML:1.4 0.0000663 0.14 AML other m 2021-09-18T01:43:30.21
IV.LNSS.HHN. ML:1.1 0.000037449999999999995 0.56 AML other m 2021-09-18T01:43:30.34
IV.LNSS.HHE. ML:1.3 0.0000479 0.46 AML other m 2021-09-18T01:43:31.59
IV.MURB.HHN. ML:1.5 0.0000979 0.7 AML other m 2021-09-18T01:43:31.89
IV.SSFR.HHN. ML:1.3 0.0000539 1.5 AML other m 2021-09-18T01:43:31.21
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