Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.4 on date 23-10-2020 and time 18:46:01 (Italy) in region 4 km NW Troina (EN)

A magnitude ML 2.4 earthquake occured in region: 4 km NW Troina (EN), on

  • 23-10-2020 16:46:01 (UTC)
  • 23-10-2020 18:46:01 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.8200, 14.5790 at 34 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
Troina EN 4 9373 9373
Cerami EN 6 2006 11379
Capizzi ME 9 3176 14555
San Teodoro ME 11 1403 15958
Cesarò ME 12 2439 18397
Gagliano Castelferrato EN 13 3593 21990
Nicosia EN 18 13899 35889
Agira EN 19 8345 44234
Regalbuto EN 19 7277 51511

Municipalities with at least 50000 inhabitants

An earthquake occurred to
57 Km W of Acireale (52622 inhabitants)
57 Km NW of Catania (314555 inhabitants)
58 Km NE of Caltanissetta (63360 inhabitants)
89 Km NE of Gela (75827 inhabitants)
95 Km W of Messina (238439 inhabitants)
97 Km N of Vittoria (63339 inhabitants)
98 Km E of Bagheria (55387 inhabitants)
99 Km W of Reggio di Calabria (183035 inhabitants)
100 Km N of Ragusa (73313 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 2.4 2020-10-23
16:46:01		 37.8205 14.5787 34 2021-02-26
14:56:01		 Bollettino Sismico Italiano INGV 84154741
Reviewed
Rev100 		ML 2.3 2020-10-23
16:46:01		 37.8277 14.5778 36 2021-02-26
14:16:36		 Sala Sismica INGV-Roma 84062281
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-10-23 16:46:01 ± 0.1
Latitude 37.8205 ± 0.0063
Longitude 14.5787 ± 0.0091
Depth (km) 34 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 84154741

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 691
Semi-minor axis of confidence ellipse (meter) 560
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 254
Circular confidence region, given by single value of horizontal uncertainty (meter) 690.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 55
Number of associated phases, regardless of their use for origin computation 43
Number of defining phases 43
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.33
Epicentral distance of station closest to the epicenter (degree) 0.11062
Epicentral distance of station farthest from the epicenter (degree) 1.17002
Number of stations at which the event was observed 29
Number of stations from which data was used for origin computation 29
Magnitudes information

ML:2.4

Field Value
Value 2.4
Uncertainty 0.3
Num. used stations 52
Type of magnitude ML
Reference to an origin 84154741
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-12-22 16:37:54

ML:2.3

Field Value
Value 2.3
Uncertainty 0.3
Num. used stations 48
Type of magnitude ML
Reference to an origin 84062281
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-10-23 16:59:18
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.HAVL.HHN. 2020-10-23T16:46:32.95 0.6 undecidable manual S 153 106.8153 54 0.49 40
IV.HMDC.HHZ. 2020-10-23T16:46:30.55 0.6 undecidable manual S 169 97.2249 54 0.16 43
IV.SSY.HHN. 2020-10-23T16:46:27.89 0.6 undecidable manual S 149 85.4478 107 0.22 44
IV.AGST.EHN. 2020-10-23T16:46:27.15 0.6 undecidable manual S 137 84.6486 107 -0.32 43
IV.HAGA.HHZ. 2020-10-23T16:46:25.83 0.3 undecidable manual S 139 78.0663 109 0.03 69
IV.IVPL.HHZ. 2020-10-23T16:46:25.03 0.6 undecidable manual S 29 70.8735 111 1.03 34
IV.HCRL.HHZ. 2020-10-23T16:46:24.32 0.6 undecidable manual S 146 71.7726 110 0.12 46
IV.HPAC.HHN. 2020-10-23T16:46:22.70 1.0 undecidable manual P 162 129.87 54 0.46 19
IV.HLNI.HHZ. 2020-10-23T16:46:21.51 0.6 undecidable manual S 154 58.3971 115 0.6 42
IV.CORL.HHZ. 2020-10-23T16:46:20.83 1.0 undecidable manual P 275 111.999 54 0.81 17
IV.HAVL.HHN. 2020-10-23T16:46:19.00 0.3 undecidable manual P 153 106.8153 54 -0.38 60
IV.PLLN.EHZ. 2020-10-23T16:46:18.89 0.6 undecidable manual S 297 42.624 124 1.64 25
IV.HMDC.HHZ. 2020-10-23T16:46:17.79 0.6 undecidable manual P 169 97.2249 54 -0.39 41
IV.CLTA.HHN. 2020-10-23T16:46:17.66 0.6 undecidable manual P 217 91.3419 54 0.21 43
IV.SSY.HHN. 2020-10-23T16:46:16.19 0.3 undecidable manual P 149 85.4478 107 -0.42 63
IV.PETRA.HHZ. 2020-10-23T16:46:16.35 0.6 undecidable manual S 272 40.626 125 -0.47 45
IV.ILOS.HHZ. 2020-10-23T16:46:15.88 0.3 undecidable manual P 25 76.4679 109 0.58 61
IV.SCIAR.HHZ. 2020-10-23T16:46:15.24 0.3 undecidable manual P 281 73.8705 110 0.33 65
IV.IACL.HHN. 2020-10-23T16:46:15.41 0.3 undecidable manual P 346 81.3519 108 -0.61 60
IV.MUCR.HHZ. 2020-10-23T16:46:15.81 0.6 undecidable manual S 46 35.742 129 0.04 50
IV.AGST.EHN. 2020-10-23T16:46:15.86 0.6 undecidable manual P 137 84.6486 107 -0.63 39
IV.IFIL.HHZ. 2020-10-23T16:46:15.57 0.6 undecidable manual P 360 82.4508 108 -0.61 40
IV.MILZ.HHE. 2020-10-23T16:46:15.30 0.6 undecidable manual P 49 75.8685 109 0.1 46
IV.IVPL.HHZ. 2020-10-23T16:46:14.96 0.3 undecidable manual P 29 70.8735 111 0.47 64
IV.RAFF.HHZ. 2020-10-23T16:46:14.54 0.3 undecidable manual P 196 68.9754 111 0.32 66
IV.EPZF.HHZ. 2020-10-23T16:46:14.74 0.6 undecidable manual S 89 24.3534 141 1.12 35
IV.HCRL.HHZ. 2020-10-23T16:46:14.18 0.3 undecidable manual P 146 71.7726 110 -0.43 64
IV.HVZN.HNZ. 2020-10-23T16:46:14.54 0.6 undecidable manual P 170 72.2721 110 -0.14 45
IV.HAGA.HHZ. 2020-10-23T16:46:14.99 0.3 undecidable manual P 139 78.0663 109 -0.54 61
IV.AIO.HHZ. 2020-10-23T16:46:12.99 0.3 undecidable manual P 74 59.6958 115 0.1 71
IV.MSFR.HHZ. 2020-10-23T16:46:12.86 0.3 undecidable manual S 3 23.6541 142 -0.64 66
IV.HLNI.HHZ. 2020-10-23T16:46:12.68 0.3 undecidable manual P 154 58.3971 115 -0.03 72
IV.GALF.HHZ. 2020-10-23T16:46:11.73 0.3 undecidable manual S 185 12.2766 158 -0.23 75
IV.GIB.HHZ. 2020-10-23T16:46:11.85 0.3 undecidable manual P 291 51.9036 118 0.04 72
IV.PETRA.HHZ. 2020-10-23T16:46:10.38 0.3 undecidable manual P 272 40.626 125 0.04 74
IV.CSLB.HHZ. 2020-10-23T16:46:10.91 0.1 undecidable manual P 286 47.4192 121 -0.31 92
MN.VAE.HHZ. 2020-10-23T16:46:10.98 0.6 undecidable manual P 207 43.7229 123 0.25 47
IV.PLLN.EHZ. 2020-10-23T16:46:10.52 0.3 undecidable manual P 297 42.624 124 -0.07 73
IV.CAGR.HHE. 2020-10-23T16:46:09.17 0.3 undecidable manual P 197 23.0547 143 0.8 61
IV.MUCR.HHZ. 2020-10-23T16:46:09.73 0.1 positive manual P 46 35.742 129 -0.01 100
IV.MSFR.HHZ. 2020-10-23T16:46:08.12 0.1 undecidable manual P 3 23.6541 142 -0.31 96
IV.EPZF.HHZ. 2020-10-23T16:46:08.56 0.6 undecidable manual P 89 24.3534 141 0.06 50
IV.GALF.HHZ. 2020-10-23T16:46:07.29 0.1 negative manual P 185 12.2766 158 -0.25 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.GALF.HNE. ML:1.6 0.000183 1.46 AML other m 2020-10-23T16:46:13.77
IV.GALF.HHE. ML:2.6 0.00156 1.36 AML other m 2020-10-23T16:46:13.78
IV.GALF.HNN. ML:1.8 0.00023999999999999998 1.22 AML other m 2020-10-23T16:46:13.13
IV.GALF.HHN. ML:2.5 0.0012200000000000002 0.56 AML other m 2020-10-23T16:46:14.49
IV.MSFR.HHN. ML:2.1 0.00040249999999999997 0.34 AML other m 2020-10-23T16:46:14.80
IV.MSFR.HHE. ML:1.9 0.000259 0.7 AML other m 2020-10-23T16:46:14.94
IV.EPZF.HHE. ML:2.3 0.000714 0.84 AML other m 2020-10-23T16:46:16.06
IV.EPZF.HHN. ML:2.3 0.0007075 0.64 AML other m 2020-10-23T16:46:16.69
IV.MUCR.HHE. ML:2.1 0.00033150000000000003 1.2 AML other m 2020-10-23T16:46:16.78
IV.MUCR.HHN. ML:2.2 0.00041000000000000005 0.44 AML other m 2020-10-23T16:46:19.41
IV.CSLB.HHE. ML:1.7 0.0001017 1.54 AML other m 2020-10-23T16:46:20.82
IV.PLLN.EHN. ML:2.9 0.0019100000000000002 0.6 AML other m 2020-10-23T16:46:21.35
IV.PLLN.EHE. ML:2.8 0.0013900000000000002 0.54 AML other m 2020-10-23T16:46:21.63
IV.PETRA.HHE. ML:2.1 0.000319 0.5 AML other m 2020-10-23T16:46:22.73
IV.HLNI.HHE. ML:2.2 0.000266 0.48 AML other m 2020-10-23T16:46:23.38
IV.HLNI.HHN. ML:2.1 0.00023249999999999999 0.54 AML other m 2020-10-23T16:46:23.18
IV.GIB.HHN. ML:2.3 0.00041200000000000004 0.6 AML other m 2020-10-23T16:46:23.69
IV.PETRA.HHN. ML:2.0 0.0002525 0.58 AML other m 2020-10-23T16:46:23.52
IV.AIO.HHN. ML:2.2 0.0002565 1.58 AML other m 2020-10-23T16:46:24.83
IV.CSLB.HHN. ML:1.7 0.0001175 1.26 AML other m 2020-10-23T16:46:24.18
IV.AIO.HHE. ML:2.2 0.0002875 0.4 AML other m 2020-10-23T16:46:24.35
IV.HCRL.HHE. ML:2.4 0.0003185 0.54 AML other m 2020-10-23T16:46:25.17
IV.HCRL.HHN. ML:2.3 0.00026849999999999997 0.22 AML other m 2020-10-23T16:46:25.87
IV.RAFF.HHE. ML:2.2 0.00022799999999999999 0.74 AML other m 2020-10-23T16:46:25.92
IV.RAFF.HHN. ML:2.1 0.000187 0.9 AML other m 2020-10-23T16:46:25.48
IV.HAGA.HHE. ML:3.0 0.0011639999999999999 0.38 AML other m 2020-10-23T16:46:26.42
IV.HAGA.HHN. ML:2.6 0.0005110000000000001 0.32 AML other m 2020-10-23T16:46:26.55
IV.AGST.EHE. ML:3.0 0.0011075 1.52 AML other m 2020-10-23T16:46:27.18
IV.AGST.EHN. ML:3.0 0.001238 1.1 AML other m 2020-10-23T16:46:27.96
IV.IVPL.HHE. ML:2.2 0.0002525 1.36 AML other m 2020-10-23T16:46:28.68
IV.IVPL.HHN. ML:2.3 0.000263 0.7 AML other m 2020-10-23T16:46:28.58
IV.SSY.HHE. ML:3.2 0.0017649999999999999 0.3 AML other m 2020-10-23T16:46:28.61
IV.IACL.HHN. ML:2.2 0.00017549999999999998 0.68 AML other m 2020-10-23T16:46:28.89
IV.SCIAR.HHE. ML:2.2 0.00020250000000000002 0.98 AML other m 2020-10-23T16:46:29.12
IV.ILOS.HNN. ML:2.8 0.0008415 0.72 AML other m 2020-10-23T16:46:29.27
IV.ILOS.HHN. ML:2.8 0.0008725 0.72 AML other m 2020-10-23T16:46:29.28
IV.SCIAR.HHN. ML:2.2 0.0002125 0.64 AML other m 2020-10-23T16:46:29.64
IV.SCIAR.HNN. ML:2.3 0.00027049999999999996 0.66 AML other m 2020-10-23T16:46:29.65
IV.SCIAR.HNE. ML:2.3 0.000268 0.68 AML other m 2020-10-23T16:46:29.77
IV.MILZ.HHN. ML:2.5 0.000382 1.06 AML other m 2020-10-23T16:46:29.81
IV.SSY.HHN. ML:3.3 0.00246 0.64 AML other m 2020-10-23T16:46:29.55
IV.GIB.HHE. ML:2.2 0.0003115 1.5 AML other m 2020-10-23T16:46:29.88
IV.MILZ.HHE. ML:2.7 0.0006585000000000001 0.94 AML other m 2020-10-23T16:46:30.18
IV.ILOS.HNE. ML:2.7 0.0006215 0.38 AML other m 2020-10-23T16:46:30.43
IV.ILOS.HHE. ML:2.7 0.000669 0.38 AML other m 2020-10-23T16:46:30.44
IV.IFIL.HHN. ML:2.6 0.0004605 0.26 AML other m 2020-10-23T16:46:30.61
IV.IFIL.HHE. ML:3.0 0.0011825 1.66 AML other m 2020-10-23T16:46:31.93
IV.HMDC.HHN. ML:2.5 0.0002765 0.46 AML other m 2020-10-23T16:46:32.43
IV.IACL.HHE. ML:2.2 0.00020150000000000002 0.3 AML other m 2020-10-23T16:46:32.69
IV.HMDC.HHE. ML:2.4 0.00022300000000000003 0.22 AML other m 2020-10-23T16:46:33.18
IV.HAVL.HHE. ML:2.6 0.000306 0.54 AML other m 2020-10-23T16:46:34.45
IV.HAVL.HHN. ML:2.6 0.000299 0.32 AML other m 2020-10-23T16:46:37.06
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
Waveforms Seismic signals in miniseed + resp format Download