Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.4 on date 03-02-2020 and time 17:33:40 (Italy) in region 6 km SE Troina (EN)

A magnitude ML 1.4 earthquake occured in region: 6 km SE Troina (EN), on

  • 03-02-2020 16:33:40 (UTC)
  • 03-02-2020 17:33:40 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 37.7400, 14.6330 at 20 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
Gagliano Castelferrato EN 9 3593 12966
Regalbuto EN 10 7277 20243
Agira EN 13 8345 28588
San Teodoro ME 13 1403 29991
Cesarò ME 14 2439 32430
Cerami EN 14 2006 34436
Centuripe EN 16 5470 39906
Capizzi ME 18 3176 43082
Bronte CT 18 19172 62254
Nissoria EN 19 3000 65254
Adrano CT 20 36122 101376
Catenanuova EN 20 4866 106242

Municipalities with at least 50000 inhabitants

An earthquake occurred to
48 Km NW of Catania (314555 inhabitants)
49 Km W of Acireale (52622 inhabitants)
57 Km NE of Caltanissetta (63360 inhabitants)
82 Km NE of Gela (75827 inhabitants)
88 Km N of Vittoria (63339 inhabitants)
91 Km N of Ragusa (73313 inhabitants)
95 Km SW of Messina (238439 inhabitants)
96 Km NW of Siracusa (122291 inhabitants)
98 Km W of Reggio di Calabria (183035 inhabitants)
99 Km N of Modica (54633 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 1.4 2020-02-03
16:33:40		 37.7403 14.6332 20 2020-07-18
21:08:34		 Bollettino Sismico Italiano INGV 78545481
Reviewed
Rev100 		ML 1.5 2020-02-03
16:33:39		 37.7478 14.5973 28 2020-02-03
16:39:13		 Sala Sismica INGV-Roma 76169321
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-02-03 16:33:40 ± 0.28
Latitude 37.7403 ± 0.0099
Longitude 14.6332 ± 0.0216
Depth (km) 20 ± 3 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 78545481

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1662
Semi-minor axis of confidence ellipse (meter) 1053
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 110
Circular confidence region, given by single value of horizontal uncertainty (meter) 1660.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 89
Number of associated phases, regardless of their use for origin computation 10
Number of defining phases 10
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.41
Epicentral distance of station closest to the epicenter (degree) 0.06025
Epicentral distance of station farthest from the epicenter (degree) 0.56028
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 7
Magnitudes information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.2
Num. used stations 4
Type of magnitude ML
Reference to an origin 78545481
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-04-24 18:56:20

ML:1.5

Field Value
Value 1.5
Uncertainty 0.2
Num. used stations 4
Type of magnitude ML
Reference to an origin 76169321
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-02-03 16:39:13
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.HLNI.HHZ. 2020-02-03T16:33:56.49 0.3 undecidable manual S 154 48.3183 104 0.31 71
IV.MUCR.HHZ. 2020-02-03T16:33:54.41 0.3 undecidable manual S 32 39.627 108 0.44 67
IV.CSLB.HHZ. 2020-02-03T16:33:51.41 0.6 undecidable manual P 294 54.9006 102 0.85 39
IV.RAFF.HHZ. 2020-02-03T16:33:51.78 0.3 undecidable manual P 203 62.1933 100 0.12 73
IV.HLNI.HHZ. 2020-02-03T16:33:49.18 0.3 undecidable manual P 154 48.3183 104 -0.38 70
IV.GALF.HHZ. 2020-02-03T16:33:47.41 0.6 undecidable manual S 241 6.6933 159 0.27 51
IV.MUCR.HHZ. 2020-02-03T16:33:47.90 0.3 undecidable manual P 32 39.627 108 -0.39 72
IV.EPZF.HHZ. 2020-02-03T16:33:46.10 0.3 undecidable manual P 65 21.7671 126 0.3 73
IV.MSFR.HHZ. 2020-02-03T16:33:46.96 0.1 undecidable manual P 354 32.745 113 -0.33 98
IV.GALF.HHZ. 2020-02-03T16:33:43.92 0.1 undecidable manual P 241 6.6933 159 -0.43 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.GALF.HHE. ML:1.5 0.0002635 1.8 AML other m 2020-02-03T16:33:48.04
IV.GALF.HHN. ML:1.6 0.000314 0.3 AML other m 2020-02-03T16:33:50.35
IV.MUCR.HHN. ML:1.4 0.00007489999999999999 0.72 AML other m 2020-02-03T16:33:54.70
IV.MUCR.HHE. ML:1.2 0.0000565 0.8 AML other m 2020-02-03T16:33:55.83
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