Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.1 on date 17-10-2020 and time 13:07:43 (UTC) in region 5 km N Troina (EN)

A magnitude ML 2.1 earthquake occured in region: 5 km N Troina (EN), on

  • 17-10-2020 13:07:43 (UTC)
  • 17-10-2020 15:07:43 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.8300, 14.5860 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 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 N of Vittoria (63339 inhabitants)
98 Km W of Reggio di Calabria (183035 inhabitants)
98 Km E of Bagheria (55387 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 2.1 2020-10-17
13:07:43		 37.8297 14.5857 37 2021-02-26
14:56:03		 Bollettino Sismico Italiano INGV 84583581
Reviewed
Rev100 		ML 2.2 2020-10-17
13:07:43		 37.836 14.5737 37 2020-10-17
13:16:31		 Sala Sismica INGV-Roma 83850041
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-10-17 13:07:43 ± 0.17
Latitude 37.8297 ± 0.0126
Longitude 14.5857 ± 0.0125
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 84583581

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1272
Semi-minor axis of confidence ellipse (meter) 1067
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 353
Circular confidence region, given by single value of horizontal uncertainty (meter) 1270.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 75
Number of associated phases, regardless of their use for origin computation 34
Number of defining phases 23
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.43
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.77522
Number of stations at which the event was observed 26
Number of stations from which data was used for origin computation 15
Magnitudes information

ML:2.1

Field Value
Value 2.1
Uncertainty 0.2
Num. used stations 11
Type of magnitude ML
Reference to an origin 84583581
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-11-09 16:41:36

ML:2.2

Field Value
Value 2.2
Uncertainty 0.2
Num. used stations 12
Type of magnitude ML
Reference to an origin 83850041
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-10-17 13:16:31
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.RIBO.EHZ.01 2020-10-17T13:09:09.83 3.0 negative manual Pg 5.84 0
IV.RNI2.HHZ. 2020-10-17T13:09:09.35 3.0 undecidable manual Sn -9.99 0
IV.MCRV.HHZ. 2020-10-17T13:09:02.46 3.0 undecidable manual Sn 1.89 0
IV.MURB.HHZ. 2020-10-17T13:08:52.73 3.0 negative manual Pn -9.59 0
IT.PLTA.HNZ. 2020-10-17T13:08:50.01 3.0 undecidable manual Pg 9.25 0
IV.IOCA.HHZ. 2020-10-17T13:08:22.98 3.0 negative manual Pn -2.48 0
IV.MCEL.HHZ. 2020-10-17T13:08:16.18 3.0 positive manual Pn -6 0
IV.HAGA.HHZ. 2020-10-17T13:08:07.69 0.3 undecidable manual S 140 78.4659 54 -0.01 69
IV.HLNI.HHZ. 2020-10-17T13:08:03.24 0.3 undecidable manual S 155 58.9965 118 -0.17 71
IV.PETRA.HHE. 2020-10-17T13:08:00.07 0.6 undecidable manual S 271 41.2254 128 0.65 42
IV.PLLN.EHZ. 2020-10-17T13:08:00.46 0.6 undecidable manual S 295 42.7239 127 0.72 41
IV.SSY.HHZ. 2020-10-17T13:07:58.26 0.3 undecidable manual P 150 86.0472 54 -0.12 67
IV.MUCR.HHZ. 2020-10-17T13:07:57.53 0.3 undecidable manual S 47 34.6431 134 -0.55 67
IV.ESML.HHZ. 2020-10-17T13:07:57.05 3.0 undecidable manual P 0
IV.HAGA.HHZ. 2020-10-17T13:07:57.17 0.3 undecidable manual P 140 78.4659 54 -0.26 66
IV.EPZF.HHZ. 2020-10-17T13:07:56.51 0.3 undecidable manual S 91 23.754 145 0.32 72
IV.RAFF.HHZ. 2020-10-17T13:07:56.80 0.3 undecidable manual P 196 70.1742 54 0.4 66
IV.HCRL.HHZ. 2020-10-17T13:07:55.90 0.3 undecidable manual P 147 72.2721 54 -0.76 57
IV.HLNI.HHZ. 2020-10-17T13:07:55.08 0.3 undecidable manual P 155 58.9965 118 0.12 71
IV.MSFR.HHZ. 2020-10-17T13:07:55.32 0.6 undecidable manual S 1 22.6551 146 -0.7 43
IV.GALF.HHZ. 2020-10-17T13:07:54.28 0.1 undecidable manual S 187 13.2756 159 -0.58 94
IV.AIO.HHE. 2020-10-17T13:07:54.86 0.3 undecidable manual P 74 58.7967 118 -0.07 71
IV.ECTS.HHE. 2020-10-17T13:07:54.42 3.0 undecidable manual P 0.7 0
IV.CSLB.HHE. 2020-10-17T13:07:53.22 0.3 undecidable manual P 285 47.7189 124 -0.25 70
IV.ENIC.HHE. 2020-10-17T13:07:53.91 0.3 undecidable manual P 120 44.1225 126 0.9 57
IV.EMSG.HHN. 2020-10-17T13:07:52.66 0.3 undecidable manual P 92 31.9458 136 1.07 54
IV.PETRA.HHE. 2020-10-17T13:07:52.80 0.3 undecidable manual P 271 41.2254 128 0.14 73
IV.PLLN.EHZ. 2020-10-17T13:07:52.90 0.6 undecidable manual P 295 42.7239 127 0.06 49
IV.MUCR.HHZ. 2020-10-17T13:07:51.68 0.3 undecidable manual P 47 34.6431 134 -0.2 73
IV.EPZF.HHZ. 2020-10-17T13:07:51.63 0.1 undecidable manual P 91 23.754 145 0.84 80
X3.T1582.EHZ. 2020-10-17T13:07:51.64 3.0 negative manual Pn -9.99 0
IV.MSFR.HHZ. 2020-10-17T13:07:50.55 0.1 undecidable manual P 1 22.6551 146 -0.14 100
MN.CLTB.HHZ. 2020-10-17T13:07:50.24 3.0 positive manual P -9.99 0
IV.GALF.HHZ. 2020-10-17T13:07:49.54 0.1 undecidable manual P 187 13.2756 159 -0.49 95
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.GALF.HHN. ML:2.3 0.0007995 0.7 AML other m 2020-10-17T13:07:56.51
IV.MUCR.HHE. ML:2.0 0.0002405 0.36 AML other m 2020-10-17T13:08:00.65
IV.EPZF.HHN. ML:2.1 0.0003615 0.82 AML other m 2020-10-17T13:08:01.11
IV.MUCR.HHN. ML:2.0 0.0002415 0.58 AML other m 2020-10-17T13:08:01.32
IV.EPZF.HHE. ML:2.1 0.0003625 0.82 AML other m 2020-10-17T13:08:02.50
IV.HLNI.HHN. ML:2.0 0.0001785 1.76 AML other m 2020-10-17T13:08:05.01
IV.HLNI.HHE. ML:2.0 0.0001495 1.24 AML other m 2020-10-17T13:08:06.65
IV.HCRL.HHE. ML:2.2 0.0001955 0.48 AML other m 2020-10-17T13:08:07.50
IV.HAGA.HHN. ML:2.4 0.00028100000000000005 1.36 AML other m 2020-10-17T13:08:08.79
IV.HAGA.HHE. ML:2.4 0.000306 1.36 AML other m 2020-10-17T13:08:08.80
IV.HCRL.HHN. ML:2.1 0.0001525 1.16 AML other m 2020-10-17T13:08:08.95
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