Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.8 on date 18-11-2020 and time 05:17:08 (Italy) in region 5 km N Troina (EN)

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

  • 18-11-2020 04:17:08 (UTC)
  • 18-11-2020 05:17:08 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 37.83, 14.59 at 37 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
Troina EN 5 9373 9373
Cerami EN 7 2006 11379
Capizzi ME 10 3176 14555
San Teodoro ME 10 1403 15958
Cesarò ME 11 2439 18397
Gagliano Castelferrato EN 14 3593 21990
Nicosia EN 19 13899 35889
Agira EN 20 8345 44234
Maniace CT 20 3765 47999

Municipalities with at least 50000 inhabitants

An earthquake occurred to
57 Km W of Acireale (52622 inhabitants)
57 Km NW of Catania (314555 inhabitants)
59 Km NE of Caltanissetta (63360 inhabitants)
90 Km NE of Gela (75827 inhabitants)
94 Km W of Messina (238439 inhabitants)
98 Km W of Reggio di Calabria (183035 inhabitants)
98 Km N of Vittoria (63339 inhabitants)
98 Km E of Bagheria (55387 inhabitants)
Recent and historical Seismicity
Seismic hazard
Shakemap
Felt maps
The earthquake effects in MCS scale as obtained from the compiled questionnaire

The earthquake effects in MCS scale as obtained from the compiled questionnaire

This map shows the distribution of the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire (http://www.haisentitoilterremoto.it/) that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100 		ML 1.8 2020-11-18
04:17:08		 37.83 14.59 37 2020-11-18
04:29:00		 Sala Sismica INGV-Roma 84817281
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-11-18 04:17:08 ± 0.11
Latitude 37.83 ± 0.01
Longitude 14.59 ± 0.01
Depth (km) 37 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 84817281

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 804
Semi-minor axis of confidence ellipse (meter) 778
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 248
Circular confidence region, given by single value of horizontal uncertainty (meter) 800
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 73
Number of associated phases, regardless of their use for origin computation 30
Number of defining phases 27
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.31
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.77522
Number of stations at which the event was observed 17
Number of stations from which data was used for origin computation 14
Magnitude information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.4
Num. used stations 12
Type of magnitude ML
Reference to an origin 84817281
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-11-18 04:29:00
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IX.STN3.HNZ.01 2020-11-18T04:17:53.46 3.0 undecidable manual Pn -0.4 0
IV.CMPR.HHZ. 2020-11-18T04:17:50.91 3.0 undecidable manual Pn 0.75 0
XK.ALB1.HHZ. 2020-11-18T04:17:40.40 3.0 positive manual Pn -1.24 0
IV.AGST.EHZ. 2020-11-18T04:17:34.02 0.6 undecidable manual S 138 0.7653 54 0.11 45
IV.SSY.HHZ. 2020-11-18T04:17:34.93 0.6 undecidable manual S 150 0.7752 54 0.8 37
IV.RAFF.HHZ. 2020-11-18T04:17:31.03 1.0 undecidable manual S 196 0.6322 54 0.32 22
IV.HCRL.HHZ. 2020-11-18T04:17:30.98 0.3 undecidable manual S 147 0.6502 54 -0.18 69
IV.AIO.HHZ. 2020-11-18T04:17:28.64 1.0 undecidable manual S 74 0.5297 118 0.56 21
IV.HLNI.HHZ. 2020-11-18T04:17:27.95 0.3 undecidable manual S 155 0.5315 118 -0.17 70
IV.PETRA.HHE. 2020-11-18T04:17:25.29 1.0 undecidable manual S 271 0.3714 128 1.15 18
IV.PLLN.EHE. 2020-11-18T04:17:24.48 1.0 undecidable manual S 295 0.3849 127 0.02 25
IV.ESML.HHE. 2020-11-18T04:17:23.58 1.0 undecidable manual S 132 0.3139 133 0.74 21
IV.MUCR.HHZ. 2020-11-18T04:17:22.62 0.3 undecidable manual S 47 0.3121 133 -0.17 75
IV.EPZF.HHE. 2020-11-18T04:17:22.04 1.0 undecidable manual S 91 0.214 145 1.15 18
IV.AGST.EHZ. 2020-11-18T04:17:22.70 0.1 undecidable manual P 138 0.7653 54 -0.33 87
IV.SSY.HHZ. 2020-11-18T04:17:22.72 0.1 undecidable manual P 150 0.7752 54 -0.44 85
IV.RAFF.HHZ. 2020-11-18T04:17:21.36 0.1 undecidable manual P 196 0.6322 54 0.18 92
IV.HCRL.HHZ. 2020-11-18T04:17:21.62 0.1 undecidable manual P 147 0.6502 54 0.18 91
IV.MSFR.HHZ. 2020-11-18T04:17:20.86 0.6 undecidable manual S 1 0.2041 146 0.13 50
IV.GALF.HHZ. 2020-11-18T04:17:19.35 0.6 undecidable manual S 187 0.1196 159 -0.2 50
IV.HLNI.HHZ. 2020-11-18T04:17:19.61 0.1 undecidable manual P 155 0.5315 118 -0.08 95
IV.AIO.HHZ. 2020-11-18T04:17:19.86 0.1 undecidable manual P 74 0.5297 118 0.19 93
IV.PETRA.HHE. 2020-11-18T04:17:17.45 0.1 undecidable manual P 271 0.3714 128 0.06 100
IV.PLLN.EHE. 2020-11-18T04:17:17.55 0.1 undecidable manual P 295 0.3849 127 -0.03 100
IV.MUCR.HHZ. 2020-11-18T04:17:16.41 0.1 undecidable manual P 47 0.3121 133 -0.2 99
IV.EPZF.HHE. 2020-11-18T04:17:16.03 0.1 undecidable manual P 91 0.214 145 0.51 93
IV.ESML.HHE. 2020-11-18T04:17:16.38 0.3 undecidable manual P 132 0.3139 133 -0.26 72
IV.CAGR.HHE. 2020-11-18T04:17:15.94 0.1 undecidable manual P 198 0.2185 144 0.38 97
IV.MSFR.HHZ. 2020-11-18T04:17:15.07 0.1 undecidable manual P 1 0.2041 146 -0.35 97
IV.GALF.HHZ. 2020-11-18T04:17:14.06 0.1 undecidable manual P 187 0.1196 159 -0.69 87
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.GALF.HHE. ML:1.8 0.000207 0.56 AML other m 2020-11-18T04:17:19.60
IV.GALF.HHN. ML:1.7 0.000191 0.68 AML other m 2020-11-18T04:17:21.33
IV.HLNI.HHE. ML:1.5 5.58E-5 1.68 AML other m 2020-11-18T04:17:29.15
IV.HLNI.HHN. ML:1.5 5.555E-5 0.72 AML other m 2020-11-18T04:17:30.52
IV.AGST.EHN. ML:2.4 0.000296 0.5 AML other m 2020-11-18T04:17:34.80
IV.AGST.EHE. ML:2.4 0.000251 1.6 AML other m 2020-11-18T04:17:34.04
IV.SSY.HHE. ML:2.6 0.0004005 0.82 AML other m 2020-11-18T04:17:35.50
IV.SSY.HHN. ML:2.7 0.0005825 0.46 AML other m 2020-11-18T04:17:37.20
IV.AIO.HHE. ML:1.3 3.6954585E-5 0.9408 AML other m 2020-11-18T04:17:32.41
IV.AIO.HHN. ML:1.6 5.765338E-5 0.4 AML other m 2020-11-18T04:17:30.81
IV.HCRL.HHE. ML:1.8 8.634829E-5 0.1632 AML other m 2020-11-18T04:17:32.00
IV.HCRL.HHN. ML:1.6 5.5700885E-5 0.3616 AML other m 2020-11-18T04:17:32.68
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download