Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.5 on date 04-02-2020 and time 03:37:02 (Italy) in region 3 km SW Troina (EN)

A magnitude ML 1.5 earthquake occured in region: 3 km SW Troina (EN), on

  • 04-02-2020 02:37:02 (UTC)
  • 04-02-2020 03:37:02 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 37.7650, 14.5860 at 35 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 3 9373 9373
Gagliano Castelferrato EN 7 3593 12966
Cerami EN 9 2006 14972
Agira EN 13 8345 23317
Regalbuto EN 13 7277 30594
Capizzi ME 13 3176 33770
San Teodoro ME 14 1403 35173
Cesarò ME 14 2439 37612
Nicosia EN 17 13899 51511
Nissoria EN 17 3000 54511

Municipalities with at least 50000 inhabitants

An earthquake occurred to
53 Km NW of Catania (314555 inhabitants)
54 Km W of Acireale (52622 inhabitants)
55 Km NE of Caltanissetta (63360 inhabitants)
83 Km NE of Gela (75827 inhabitants)
91 Km N of Vittoria (63339 inhabitants)
94 Km N of Ragusa (73313 inhabitants)
98 Km SW of Messina (238439 inhabitants)
100 Km NW of Siracusa (122291 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 1.5 2020-02-04
02:37:02		 37.7652 14.5863 35 2020-07-18
21:08:30		 Bollettino Sismico Italiano INGV 77836621
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-02-04 02:37:02 ± 0.29
Latitude 37.7652 ± 0.0135
Longitude 14.5863 ± 0.0239
Depth (km) 35 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 77836621

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 2144
Semi-minor axis of confidence ellipse (meter) 1240
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 263
Circular confidence region, given by single value of horizontal uncertainty (meter) 2140.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 155
Number of associated phases, regardless of their use for origin computation 15
Number of defining phases 15
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.4
Epicentral distance of station closest to the epicenter (degree) 0.05666
Epicentral distance of station farthest from the epicenter (degree) 0.71946
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 8
Magnitude information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.3
Num. used stations 7
Type of magnitude ML
Reference to an origin 77836621
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-04-03 15:30:03
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.SSY.HHZ. 2020-02-04T02:37:27.50 0.6 undecidable manual S 147 79.8645 109 0.55 56
IV.HLNI.HHZ. 2020-02-04T02:37:20.24 0.6 undecidable manual S 151 52.6029 119 -0.05 64
IV.ENIC.HNZ. 2020-02-04T02:37:18.24 1.0 undecidable manual S 111 41.0256 126 0.56 30
IV.SSY.HHZ. 2020-02-04T02:37:16.20 0.6 undecidable manual P 147 79.8645 109 -0.24 59
IV.MUCR.HHZ. 2020-02-04T02:37:16.74 0.3 undecidable manual S 39 39.8268 127 -0.69 85
IV.MSFR.HHZ. 2020-02-04T02:37:15.91 0.6 undecidable manual S 1 29.8479 136 0.47 61
IV.EPZF.HHZ. 2020-02-04T02:37:15.37 0.6 undecidable manual S 75 24.6531 142 0.84 54
IV.GALF.HHZ. 2020-02-04T02:37:12.27 0.6 undecidable manual S 196 6.2937 169 -0.18 68
IV.HLNI.HHZ. 2020-02-04T02:37:12.31 0.3 undecidable manual P 151 52.6029 119 -0.28 92
IV.ENIC.HNZ. 2020-02-04T02:37:10.57 0.6 undecidable manual P 111 41.0256 126 -0.52 59
IV.MUCR.HHZ. 2020-02-04T02:37:10.90 0.3 undecidable manual P 39 39.8268 127 -0.04 100
IV.MSFR.HHZ. 2020-02-04T02:37:09.86 0.3 undecidable manual P 1 29.8479 136 0.07 100
IV.EPZF.HHZ. 2020-02-04T02:37:09.13 0.6 undecidable manual P 75 24.6531 142 -0.14 67
IV.CAGR.HHE. 2020-02-04T02:37:09.69 0.3 undecidable manual P 206 17.5713 151 1.02 76
IV.GALF.HHZ. 2020-02-04T02:37:07.62 0.3 undecidable manual P 196 6.2937 169 -0.45 96
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.GALF.HNN. ML:1.6 0.0001615551 0.9008 AML other m 2020-02-04T02:37:19.17
IV.GALF.HHN. ML:1.8 0.00028234325000000003 0.2608 AML other m 2020-02-04T02:37:12.79
IV.GALF.HNE. ML:1.4 0.00010911774 0.7008 AML other m 2020-02-04T02:37:15.91
IV.GALF.HHE. ML:1.8 0.0002778447 0.2 AML other m 2020-02-04T02:37:12.67
IV.MUCR.HHE. ML:1.2 0.000040904460000000005 0.9808 AML other m 2020-02-04T02:37:17.64
IV.MUCR.HHN. ML:1.4 0.000054531105000000004 0.32 AML other m 2020-02-04T02:37:19.13
IV.HLNI.HHE. ML:1.2 0.0000305192 0.12 AML other m 2020-02-04T02:37:20.82
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