Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.8 on date 18-10-2020 and time 04:18:47 (Italy) in region 5 km NW Troina (EN)

A magnitude ML 1.8 earthquake occured in region: 5 km NW Troina (EN), on

  • 18-10-2020 02:18:47 (UTC)
  • 18-10-2020 04:18:47 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.8240, 14.5840 at 37 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 5 9373 9373
Cerami EN 7 2006 11379
Capizzi ME 10 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 20 7277 51511

Municipalities with at least 50000 inhabitants

An earthquake occurred to
56 Km W of Acireale (52622 inhabitants)
57 Km NW of Catania (314555 inhabitants)
59 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)
98 Km W of Reggio di Calabria (183035 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 1.8 2020-10-18
02:18:47		 37.8243 14.584 37 2021-02-26
14:56:04		 Bollettino Sismico Italiano INGV 84603641
Reviewed
Rev100 		ML 1.9 2020-10-18
02:18:47		 37.8268 14.5867 35 2020-10-18
02:36:59		 Sala Sismica INGV-Roma 83866271
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-10-18 02:18:47 ± 0.09
Latitude 37.8243 ± 0.0063
Longitude 14.5840 ± 0.0068
Depth (km) 37 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 84603641

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 727
Semi-minor axis of confidence ellipse (meter) 287
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 23
Circular confidence region, given by single value of horizontal uncertainty (meter) 730.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 63
Number of associated phases, regardless of their use for origin computation 30
Number of defining phases 29
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.34
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.77072
Number of stations at which the event was observed 18
Number of stations from which data was used for origin computation 17
Magnitudes information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.3
Num. used stations 5
Type of magnitude ML
Reference to an origin 84603641
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-11-10 12:00:47

ML:1.9

Field Value
Value 1.9
Uncertainty 0.5
Num. used stations 11
Type of magnitude ML
Reference to an origin 83866271
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-10-18 02:36:59
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.AGST.EHZ. 2020-10-18T02:19:13.38 0.3 undecidable manual S 138 84.6486 54 -0.09 68
IV.IFIL.HHZ. 2020-10-18T02:19:13.42 0.3 undecidable manual S 359 82.0512 54 0.5 63
IV.RAFF.HHZ. 2020-10-18T02:19:10.47 0.3 undecidable manual S 196 69.5748 54 0.25 68
IV.HLNI.HHZ. 2020-10-18T02:19:07.58 0.3 undecidable manual S 154 58.497 118 -0.04 73
IV.PLLN.EHZ. 2020-10-18T02:19:04.22 0.1 undecidable manual S 296 42.8238 127 0.14 97
MN.VAE.HHE. 2020-10-18T02:19:04.15 0.3 undecidable manual S 207 44.3223 126 -0.25 71
IV.PETRA.HHE. 2020-10-18T02:19:03.65 0.3 undecidable manual S 272 41.1255 128 -0.06 74
IV.ESML.HHZ. 2020-10-18T02:19:02.44 0.1 undecidable manual S 131 34.5432 133 0.05 100
IV.AGST.EHZ. 2020-10-18T02:19:02.26 0.1 positive manual P 138 84.6486 54 -0.36 86
IV.SSY.HHZ. 2020-10-18T02:19:02.76 0.3 undecidable manual P 150 85.5477 54 0.03 69
IV.IFIL.HHZ. 2020-10-18T02:19:01.83 0.3 undecidable manual P 359 82.0512 54 -0.47 63
IV.EPZF.HHZ. 2020-10-18T02:19:01.11 0.6 undecidable manual S 90 23.9538 144 0.6 45
IV.MUCR.HHZ. 2020-10-18T02:19:01.97 0.6 undecidable manual S 46 35.1426 133 -0.52 45
IV.MSFR.HHZ. 2020-10-18T02:19:00.82 0.1 undecidable manual S 2 23.2545 145 0.41 95
IV.RAFF.HHZ. 2020-10-18T02:19:00.93 0.1 negative manual P 196 69.5748 54 0.19 92
IV.MILZ.HHZ. 2020-10-18T02:18:59.62 3.0 positive manual P -1.68 0
IV.HLNI.HHZ. 2020-10-18T02:18:58.63 0.3 undecidable manual P 154 58.497 118 -0.61 63
IV.GALF.HHZ. 2020-10-18T02:18:58.60 0.3 undecidable manual S 187 12.6762 159 -0.49 72
IV.RESU.HHE. 2020-10-18T02:18:58.45 0.1 undecidable manual P 247 50.3163 122 0.31 93
MN.VAE.HHE. 2020-10-18T02:18:57.65 0.3 undecidable manual P 207 44.3223 126 0.27 71
IV.PLLN.EHZ. 2020-10-18T02:18:57.04 0.1 undecidable manual P 296 42.8238 127 -0.16 97
IV.ESML.HHZ. 2020-10-18T02:18:56.83 0.3 undecidable manual P 131 34.5432 133 0.61 65
IV.EMSG.HHE. 2020-10-18T02:18:56.53 0.6 undecidable manual P 91 32.0457 136 0.59 44
IV.PETRA.HHE. 2020-10-18T02:18:56.64 0.3 undecidable manual P 272 41.1255 128 -0.34 70
IV.EPZF.HHZ. 2020-10-18T02:18:55.65 0.1 undecidable manual P 90 23.9538 144 0.51 92
IV.MUCR.HHZ. 2020-10-18T02:18:55.99 0.1 undecidable manual P 46 35.1426 133 -0.29 96
IV.CAGR.HHZ. 2020-10-18T02:18:55.68 0.3 undecidable manual P 198 23.6541 145 0.57 68
IV.ECHR.HHE. 2020-10-18T02:18:55.84 0.6 undecidable manual P 118 32.6451 135 -0.17 49
IV.MSFR.HHZ. 2020-10-18T02:18:54.58 0.1 undecidable manual P 2 23.2545 145 -0.5 93
IV.GALF.HHZ. 2020-10-18T02:18:53.62 0.3 undecidable manual P 187 12.6762 159 -0.7 66
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.GALF.HHE. ML:2.1 0.0004505 0.64 AML other m 2020-10-18T02:18:59.11
IV.GALF.HHN. ML:1.8 0.00024204795 0.24 AML other m 2020-10-18T02:18:59.34
IV.MUCR.HHN. ML:1.3 0.00005139464000000001 0.3392 AML other m 2020-10-18T02:19:02.71
IV.MUCR.HHE. ML:1.6 0.00010899999999999999 0.38 AML other m 2020-10-18T02:19:03.06
IV.ESML.HHE. ML:2.0 0.0002386198 0.8208 AML other m 2020-10-18T02:19:03.50
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