Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.1 on date 17-10-2020 and time 03:50:41 (UTC) in region 6 km N Troina (EN)

A magnitude ML 2.1 earthquake occured in region: 6 km N Troina (EN), on

  • 17-10-2020 03:50:41 (UTC)
  • 17-10-2020 05:50:41 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.8350, 14.5850 at 36 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 6 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
Maniace CT 20 3765 39654
San Fratello ME 20 3707 43361

Municipalities with at least 50000 inhabitants

An earthquake occurred to
57 Km W of Acireale (52622 inhabitants)
58 Km NW of Catania (314555 inhabitants)
60 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 E of Bagheria (55387 inhabitants)
99 Km N of Vittoria (63339 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
03:50:41		 37.8353 14.5852 37 2021-02-26
14:56:01		 Bollettino Sismico Italiano INGV 84153421
Reviewed
Rev100 		ML 2.1 2020-10-17
03:50:42		 37.8582 14.5633 28 2020-10-17
04:18:10		 Sala Sismica INGV-Roma 83834521
Reviewed
Rev100 		ML 2.2 2020-10-17
03:50:41		 37.8432 14.5778 38 2020-10-17
04:10:56		 Sala Sismica INGV-Roma 83834431
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-10-17 03:50:41 ± 0.1
Latitude 37.8353 ± 0.0081
Longitude 14.5852 ± 0.0102
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 84153421

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 904
Semi-minor axis of confidence ellipse (meter) 813
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 32
Circular confidence region, given by single value of horizontal uncertainty (meter) 900.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 52
Number of associated phases, regardless of their use for origin computation 34
Number of defining phases 33
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.39
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.97397
Number of stations at which the event was observed 25
Number of stations from which data was used for origin computation 24
Magnitudes information

ML:2.1

Field Value
Value 2.1
Uncertainty 0.3
Num. used stations 20
Type of magnitude ML
Reference to an origin 83834521
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-10-17 04:18:10

ML:2.2

Field Value
Value 2.2
Uncertainty 0.3
Num. used stations 28
Type of magnitude ML
Reference to an origin 83834431
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-10-17 04:10:56

ML:2.1

Field Value
Value 2.1
Uncertainty 0.3
Num. used stations 20
Type of magnitude ML
Reference to an origin 84153421
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-10-26 13:09:02
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.SSY.HHZ. 2020-10-17T03:51:08.04 0.6 undecidable manual S 150 86.6466 54 0.16 44
IV.AGST.EHZ. 2020-10-17T03:51:07.19 0.3 undecidable manual S 138 85.5477 54 -0.45 63
IV.HCRL.HHZ. 2020-10-17T03:51:04.88 0.3 undecidable manual S 147 72.7716 54 -0.03 71
IV.HAVL.HHZ. 2020-10-17T03:50:59.58 0.3 undecidable manual P 154 108.114 54 0.08 65
IV.HMDC.HHZ. 2020-10-17T03:50:58.43 0.3 undecidable manual P 170 98.7234 54 0.09 66
IV.PLLN.EHZ. 2020-10-17T03:50:57.66 0.6 undecidable manual S 294 42.4242 127 -0.23 48
IV.ESML.HHZ. 2020-10-17T03:50:56.48 0.6 undecidable manual S 133 35.3424 133 0.05 50
IV.ILOS.HHZ. 2020-10-17T03:50:56.02 3.0 undecidable manual P 0
IV.AGST.EHZ. 2020-10-17T03:50:56.19 0.3 undecidable manual P 138 85.5477 54 -0.5 63
IV.IFIL.HHZ. 2020-10-17T03:50:56.09 0.3 undecidable manual P 359 80.8635 54 -0.02 70
IV.SSY.HHZ. 2020-10-17T03:50:56.75 0.3 undecidable manual P 150 86.6466 54 -0.08 68
IV.IACL.HHZ. 2020-10-17T03:50:55.84 0.3 undecidable manual P 346 79.9644 54 -0.16 68
IV.IVPL.HHZ. 2020-10-17T03:50:55.39 0.3 undecidable manual P 30 69.1752 114 0.74 58
IV.MPNC.HHZ. 2020-10-17T03:50:55.91 0.3 undecidable manual P 63 75.4689 54 0.47 64
IV.MUCR.HHZ. 2020-10-17T03:50:55.89 0.1 undecidable manual S 48 34.1436 134 -0.32 95
IV.EPZF.HHZ. 2020-10-17T03:50:54.64 0.3 undecidable manual S 93 23.8539 144 0.25 74
IV.HCRL.HHZ. 2020-10-17T03:50:54.64 0.3 undecidable manual P 147 72.7716 54 -0.47 65
IV.RAFF.HHZ. 2020-10-17T03:50:54.96 0.1 negative manual P 196 70.7736 54 0.1 93
IV.MSFR.HHZ. 2020-10-17T03:50:53.34 0.6 undecidable manual S 1 22.0668 146 -0.77 42
IV.AIO.HHZ. 2020-10-17T03:50:53.33 0.3 undecidable manual P 75 58.6968 118 0.14 71
IV.HLNI.HHZ. 2020-10-17T03:50:52.71 0.3 undecidable manual P 155 59.5959 117 -0.61 63
MN.VAE.HHZ. 2020-10-17T03:50:52.38 0.1 undecidable manual P 207 45.4212 125 0.94 75
IV.GALF.HHZ. 2020-10-17T03:50:52.31 0.3 undecidable manual S 187 13.9749 157 -0.78 63
IV.RESU.HHE. 2020-10-17T03:50:52.29 0.6 undecidable manual P 246 50.8158 122 0.15 48
IV.CSLB.HHZ. 2020-10-17T03:50:51.61 0.3 undecidable manual P 284 47.5191 124 -0.1 73
IV.PLLN.EHZ. 2020-10-17T03:50:51.16 0.1 undecidable manual P 294 42.4242 127 0.09 98
IV.EMSG.HHN. 2020-10-17T03:50:51.58 0.3 undecidable manual P 93 32.0457 136 1.73 37
IV.ESML.HHZ. 2020-10-17T03:50:50.01 0.3 undecidable manual P 133 35.3424 133 -0.21 73
IV.MUCR.HHZ. 2020-10-17T03:50:50.00 0.1 undecidable manual P 48 34.1436 134 -0.09 100
IV.PETRA.HHE. 2020-10-17T03:50:50.98 0.1 undecidable manual P 270 41.2254 128 0.07 99
IV.EPZF.HHZ. 2020-10-17T03:50:49.52 0.1 undecidable manual P 93 23.8539 144 0.48 94
IV.CAGR.HHE. 2020-10-17T03:50:49.72 0.1 undecidable manual P 198 24.8529 143 0.59 90
IV.MSFR.HHZ. 2020-10-17T03:50:48.60 0.1 undecidable manual P 1 22.0668 146 -0.28 98
IV.GALF.HHZ. 2020-10-17T03:50:47.71 0.1 negative manual P 187 13.9749 157 -0.58 92
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.GALF.HHE. ML:2.6 0.0012999999999999997 0.6 AML other m 2020-10-17T03:50:53.16
IV.GALF.HHN. ML:2.2 0.000622 0.54 AML other m 2020-10-17T03:50:54.56
IV.MSFR.HHN. ML:1.6 0.00013164313999999998 0.3392 AML other m 2020-10-17T03:50:55.11
IV.MSFR.HHE. ML:1.4 0.00008651444 0.3616 AML other m 2020-10-17T03:50:55.26
IV.EPZF.HHN. ML:2.1 0.0003785 1.28 AML other m 2020-10-17T03:50:57.03
IV.EPZF.HHE. ML:2.0 0.0003015 0.48 AML other m 2020-10-17T03:50:57.62
IV.MUCR.HHE. ML:2.0 0.0002405 0.44 AML other m 2020-10-17T03:50:58.75
IV.ESML.HHN. ML:2.0 0.00027649999999999994 0.5 AML other m 2020-10-17T03:50:59.38
IV.MUCR.HHN. ML:2.0 0.0002505 1.2 AML other m 2020-10-17T03:50:59.75
IV.ESML.HHE. ML:2.2 0.0004465 0.68 AML other m 2020-10-17T03:50:59.56
IV.HLNI.HHE. ML:1.9 0.000146 0.32 AML other m 2020-10-17T03:51:03.72
IV.HLNI.HHN. ML:2.0 0.000158 1.04 AML other m 2020-10-17T03:51:03.06
IV.AIO.HHE. ML:1.8 0.00011525000000000001 0.48 AML other m 2020-10-17T03:51:03.89
IV.AIO.HHN. ML:2.1 0.00021 0.36 AML other m 2020-10-17T03:51:04.22
IV.HCRL.HHE. ML:2.2 0.00023249999999999999 0.5 AML other m 2020-10-17T03:51:05.56
IV.AGST.EHN. ML:2.7 0.0005700000000000001 0.94 AML other m 2020-10-17T03:51:08.36
IV.AGST.EHE. ML:2.7 0.0006015 0.42 AML other m 2020-10-17T03:51:08.60
IV.HCRL.HHN. ML:2.1 0.000162 0.8 AML other m 2020-10-17T03:51:08.84
IV.SSY.HHE. ML:2.9 0.0008745000000000001 0.28 AML other m 2020-10-17T03:51:09.07
IV.SSY.HHN. ML:2.9 0.0009615 0.9 AML other m 2020-10-17T03:51:14.76
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