Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.7 on date 20-09-2023 and time 19:46:09 (Italy) in region 4 km W Monte Cavallo (MC)

A magnitude ML 1.7 earthquake occured in region: 4 km W Monte Cavallo (MC), on

  • 20-09-2023 17:46:09 (UTC)
  • 20-09-2023 19:46:09 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.0070, 12.9600 at 14 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 4 145 145
Serravalle di Chienti MC 7 1070 1215
Pieve Torina MC 9 1458 2673
Muccia MC 11 915 3588
Fiordimonte MC 11 202 3790
Pievebovigliana MC 12 866 4656
Sellano PG 13 1079 5735
Visso MC 13 1107 6842
Sefro MC 16 422 7264
Preci PG 16 724 7988
Ussita MC 16 444 8432
Fiastra MC 16 559 8991
Camerino MC 17 6974 15965
Valtopina PG 18 1398 17363
Acquacanina MC 18 121 17484
Nocera Umbra PG 18 5839 23323
Pioraco MC 19 1134 24457

Municipalities with at least 50000 inhabitants

An earthquake occurred to
22 Km E of Foligno (57155 inhabitants)
48 Km E of Perugia (166134 inhabitants)
56 Km NE of Terni (111501 inhabitants)
72 Km NW of Teramo (54892 inhabitants)
81 Km NW of L'Aquila (69753 inhabitants)
82 Km SW of Ancona (100861 inhabitants)
93 Km S of Fano (60888 inhabitants)
96 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 1.7 2023-09-20
17:46:09		 43.0072 12.9602 14 2023-09-20
17:52:26		 Sala Sismica INGV-Roma 121285371
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-09-20 17:46:09 ± 0.07
Latitude 43.0072 ± 0.0036
Longitude 12.9602 ± 0.0049
Depth (km) 14 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 121285371

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 426
Semi-minor axis of confidence ellipse (meter) 233
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 226
Circular confidence region, given by single value of horizontal uncertainty (meter) 430.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 46
Number of associated phases, regardless of their use for origin computation 39
Number of defining phases 35
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) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.66370
Number of stations at which the event was observed 29
Number of stations from which data was used for origin computation 25
Magnitude information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.4
Num. used stations 50
Type of magnitude ML
Reference to an origin 121285371
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-09-20 17:52:26
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MPPT.EHZ. 2023-09-20T17:46:59.90 3.0 undecidable manual Sn 0.49 0
IV.VMGN.HHZ. 2023-09-20T17:46:52.89 3.0 undecidable manual S -0.29 0
IV.LMD.HHZ. 2023-09-20T17:46:34.34 3.0 undecidable manual P 0.38 0
IV.PIEI.HHZ. 2023-09-20T17:46:30.88 0.6 undecidable manual S 330 67.9764 93 0.57 39
IV.ATPI.EHZ. 2023-09-20T17:46:30.84 0.6 undecidable manual S 318 66.7776 93 0.85 35
IV.ATVO.HHZ. 2023-09-20T17:46:29.20 0.6 undecidable manual S 313 61.0944 93 0.71 37
IV.NARO.HHZ. 2023-09-20T17:46:22.27 1.0 undecidable manual P 336 73.6707 93 -0.21 21
IV.MPAG.EHZ. 2023-09-20T17:46:22.00 0.6 positive manual P 347 70.8735 93 -0.05 44
IV.TERO.HHZ. 2023-09-20T17:46:21.79 3.0 negative manual P -0.16 0
IV.ATPI.EHZ. 2023-09-20T17:46:21.86 0.1 undecidable manual P 318 66.7776 93 0.44 81
IV.PIEI.HHZ. 2023-09-20T17:46:21.49 1.0 undecidable manual P 330 67.9764 93 -0.11 22
IV.ATVO.HHZ. 2023-09-20T17:46:20.44 0.1 undecidable manual P 313 61.0944 93 -0.11 89
IV.RM33.EHZ. 2023-09-20T17:46:20.29 0.6 positive manual P 159 58.9965 94 0.06 45
IV.SMA1.EHZ. 2023-09-20T17:46:19.34 0.6 negative manual P 144 51.7038 94 0.23 44
IV.ARVD.HHZ. 2023-09-20T17:46:19.29 0.1 undecidable manual P 358 54.501 94 -0.24 88
IV.FRON.EHZ. 2023-09-20T17:46:19.96 0.6 undecidable manual P 342 59.6958 93 -0.37 42
IV.ASSB.HHZ. 2023-09-20T17:46:18.68 0.1 undecidable manual S 279 24.753 103 -0.17 93
IV.LNSS.HHZ. 2023-09-20T17:46:18.08 0.3 undecidable manual P 172 45.3213 95 -0.04 69
IV.CSP1.EHZ. 2023-09-20T17:46:18.16 0.1 undecidable manual S 65 21.9669 106 0.04 96
IV.MURB.HHZ. 2023-09-20T17:46:18.12 0.3 positive manual P 309 45.2214 95 0.01 70
IV.NRCA.HHZ. 2023-09-20T17:46:18.38 0.1 undecidable manual S 147 22.9548 105 -0.01 96
IV.MOMA.HHZ. 2023-09-20T17:46:17.07 1.0 positive manual P 235 38.9277 96 -0.07 23
IV.CING.HHZ. 2023-09-20T17:46:17.95 0.3 negative manual P 25 45.1215 95 -0.13 68
IV.MF5.EHZ. 2023-09-20T17:46:17.83 1.0 negative manual P 93 40.626 96 0.43 21
IV.FOSV.EHZ. 2023-09-20T17:46:16.40 0.6 negative manual P 333 35.742 97 -0.25 45
IV.ATCC.EHZ. 2023-09-20T17:46:16.01 0.1 undecidable manual P 307 32.6451 98 -0.16 92
IV.GAVE.EHZ. 2023-09-20T17:46:16.62 0.1 positive manual P 189 35.3424 97 0.03 95
IV.FEMA.HNZ. 2023-09-20T17:46:15.38 0.1 undecidable manual S 125 8.7801 139 0.25 95
IV.MML1.EHZ. 2023-09-20T17:46:15.53 0.1 undecidable manual S 5 11.7771 129 -0.17 96
IV.SNTG.HHZ. 2023-09-20T17:46:15.12 0.1 positive manual P 357 27.5502 101 -0.28 91
IV.CSP1.EHZ. 2023-09-20T17:46:14.52 0.1 undecidable manual P 65 21.9669 106 -0.04 96
IV.NRCA.HHZ. 2023-09-20T17:46:14.68 0.1 positive manual P 147 22.9548 105 -0.04 96
IV.ASSB.HHZ. 2023-09-20T17:46:14.78 0.1 negative manual P 279 24.753 103 -0.2 93
IV.CESI.HHZ. 2023-09-20T17:46:14.48 0.1 undecidable manual S 267 4.4955 158 -0.05 99
IT.MTCL.HGZ. 2023-09-20T17:46:14.43 0.1 undecidable manual S 115 3.4965 163 -0.01 100
IV.FEMA.HNZ. 2023-09-20T17:46:13.07 0.3 negative manual P 125 8.7801 139 0.24 71
IV.MML1.EHZ. 2023-09-20T17:46:13.11 0.6 undecidable manual P 5 11.7771 129 -0.06 49
IV.CESI.HHZ. 2023-09-20T17:46:12.51 0.3 undecidable manual P 267 4.4955 158 0.03 75
IT.MTCL.HGZ. 2023-09-20T17:46:12.51 0.3 undecidable manual P 115 3.4965 163 0.08 74
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CESI.HHN. ML:1.7 0.0006314999999999999 0.2 AML other m 2023-09-20T17:46:14.54
IT.MTCL.HGN. ML:3.7 0.06570000000000001 0.82 AML other m 2023-09-20T17:46:14.99
IV.CESI.HHE. ML:1.8 0.0007235000000000001 0.42 AML other m 2023-09-20T17:46:14.53
IT.MTCL.HGE. ML:3.7 0.05734999999999999 0.26 AML other m 2023-09-20T17:46:14.79
IV.MML1.EHE. ML:2.1 0.001119 1.24 AML other m 2023-09-20T17:46:15.88
IV.MML1.HNE. ML:2.0 0.001083 1.24 AML other m 2023-09-20T17:46:15.88
IV.MML1.EHN. ML:1.7 0.000496 0.46 AML other m 2023-09-20T17:46:16.28
IV.MML1.HNN. ML:1.7 0.0005420000000000001 0.44 AML other m 2023-09-20T17:46:16.28
IV.CSP1.EHN. ML:2.0 0.0005914999999999999 0.14 AML other m 2023-09-20T17:46:18.33
IV.ASSB.HHN. ML:1.9 0.0004035 0.08 AML other m 2023-09-20T17:46:19.08
IV.CSP1.EHE. ML:1.9 0.000518 1.52 AML other m 2023-09-20T17:46:19.90
IV.ASSB.HHE. ML:1.8 0.00034599999999999995 0.08 AML other m 2023-09-20T17:46:19.40
IV.NRCA.HHN. ML:1.8 0.00035049999999999995 0.62 AML other m 2023-09-20T17:46:19.22
IV.SNTG.HHE. ML:1.3 0.000101 0.12 AML other m 2023-09-20T17:46:19.51
IV.SNTG.HHN. ML:1.5 0.00015099999999999998 1.02 AML other m 2023-09-20T17:46:19.07
IV.NRCA.HHE. ML:1.8 0.000373 0.12 AML other m 2023-09-20T17:46:19.82
IV.ATCC.EHN. ML:1.6 0.0001805 1.18 AML other m 2023-09-20T17:46:21.29
IV.ATCC.EHE. ML:1.9 0.00033650000000000005 0.28 AML other m 2023-09-20T17:46:21.17
IV.FOSV.EHN. ML:1.4 0.00009779999999999999 1.58 AML other m 2023-09-20T17:46:21.01
IV.GAVE.EHE. ML:1.7 0.000179 0.56 AML other m 2023-09-20T17:46:22.29
IV.GAVE.EHN. ML:1.7 0.000184 0.5 AML other m 2023-09-20T17:46:22.31
IV.FOSV.EHE. ML:1.2 0.00006670000000000001 0.46 AML other m 2023-09-20T17:46:22.46
IV.MOMA.HHN. ML:1.9 0.0002525 0.18 AML other m 2023-09-20T17:46:23.53
IV.MOMA.HNN. ML:1.9 0.0002925 0.18 AML other m 2023-09-20T17:46:23.71
IV.MOMA.HHE. ML:2.0 0.0003795 0.2 AML other m 2023-09-20T17:46:23.81
IV.MOMA.HNE. ML:2.0 0.000342 1.82 AML other m 2023-09-20T17:46:23.01
IV.CING.HHN. ML:1.4 0.00007115 1.18 AML other m 2023-09-20T17:46:25.05
IV.CING.HHE. ML:1.3 0.00005785 0.88 AML other m 2023-09-20T17:46:25.50
IV.LNSS.HHE. ML:1.5 0.00008955000000000001 0.1 AML other m 2023-09-20T17:46:25.12
IV.LNSS.HHN. ML:1.5 0.00009379999999999999 1.16 AML other m 2023-09-20T17:46:25.93
IV.MF5.EHE. ML:1.2 0.00004897 1.38 AML other m 2023-09-20T17:46:25.75
IV.MURB.HHN. ML:1.8 0.000199 0.28 AML other m 2023-09-20T17:46:25.68
IV.MURB.HHE. ML:1.8 0.0002 0.24 AML other m 2023-09-20T17:46:26.39
IV.ARVD.HHN. ML:1.4 0.0000554 0.54 AML other m 2023-09-20T17:46:27.32
IV.ARVD.HHE. ML:1.4 0.0000571 0.18 AML other m 2023-09-20T17:46:27.55
IV.FRON.EHE. ML:1.4 0.000044899999999999994 0.76 AML other m 2023-09-20T17:46:28.84
IV.ATVO.HHN. ML:1.2 0.00003535 0.68 AML other m 2023-09-20T17:46:29.15
IV.ATVO.HHE. ML:1.4 0.0000436 0.4 AML other m 2023-09-20T17:46:29.15
IV.SMA1.EHN. ML:1.3 0.000048 0.22 AML other m 2023-09-20T17:46:29.22
IV.MF5.EHN. ML:1.2 0.000048799999999999994 0.42 AML other m 2023-09-20T17:46:29.36
IV.SMA1.EHE. ML:1.3 0.00004765 0.8 AML other m 2023-09-20T17:46:29.78
IV.FRON.EHN. ML:1.3 0.0000415 0.7 AML other m 2023-09-20T17:46:30.01
IV.PIEI.HHN. ML:1.1 0.0000214 1.26 AML other m 2023-09-20T17:46:30.95
IV.PIEI.HHE. ML:1.4 0.000043349999999999997 0.3 AML other m 2023-09-20T17:46:31.28
IV.RM33.EHN. ML:1.5 0.000059050000000000006 0.22 AML other m 2023-09-20T17:46:33.60
IV.RM33.EHE. ML:1.4 0.00004915 0.6 AML other m 2023-09-20T17:46:33.82
IV.LMD.HHN. ML:2.9 0.000382 0.3 AML other m 2023-09-20T17:46:50.45
IV.LMD.HHE. ML:2.9 0.000347 0.26 AML other m 2023-09-20T17:46:50.33
IV.MPPT.EHN. ML:2.4 0.0000817 0.74 AML other m 2023-09-20T17:47:00.49
IV.MPPT.EHE. ML:2.4 0.0000779 0.76 AML other m 2023-09-20T17:47:00.50
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