Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.5 on date 11-04-2020 and time 23:45:02 (Italy) in region 7 km SE Troina (EN)

A magnitude ML 1.5 earthquake occured in region: 7 km SE Troina (EN), on

  • 11-04-2020 21:45:02 (UTC)
  • 11-04-2020 23:45:02 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.7590, 14.6670 at 21 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 7 9373 9373
Cesarò ME 10 2439 11812
San Teodoro ME 10 1403 13215
Regalbuto EN 12 7277 20492
Gagliano Castelferrato EN 13 3593 24085
Bronte CT 15 19172 43257
Cerami EN 15 2006 45263
Centuripe EN 17 5470 50733
Agira EN 17 8345 59078
Maniace CT 17 3765 62843
Adrano CT 18 36122 98965
Maletto CT 19 3920 102885
Capizzi ME 19 3176 106061

Municipalities with at least 50000 inhabitants

An earthquake occurred to
47 Km NW of Catania (314555 inhabitants)
47 Km W of Acireale (52622 inhabitants)
61 Km NE of Caltanissetta (63360 inhabitants)
85 Km NE of Gela (75827 inhabitants)
91 Km N of Vittoria (63339 inhabitants)
92 Km SW of Messina (238439 inhabitants)
93 Km N of Ragusa (73313 inhabitants)
94 Km W of Reggio di Calabria (183035 inhabitants)
95 Km NW of Siracusa (122291 inhabitants)
100 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 1.5 2020-04-11
21:45:02		 37.7588 14.667 21 2020-07-18
21:08:37		 Bollettino Sismico Italiano INGV 79546221
Reviewed
Rev100 		ML 1.5 2020-04-11
21:45:02		 37.7607 14.6577 20 2020-04-11
21:52:43		 Sala Sismica INGV-Roma 78123681
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-04-11 21:45:02 ± 0.16
Latitude 37.7588 ± 0.0054
Longitude 14.6670 ± 0.0102
Depth (km) 21 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 79546221

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 919
Semi-minor axis of confidence ellipse (meter) 201
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 80
Circular confidence region, given by single value of horizontal uncertainty (meter) 920.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 111
Number of associated phases, regardless of their use for origin computation 19
Number of defining phases 19
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.33
Epicentral distance of station closest to the epicenter (degree) 0.09263
Epicentral distance of station farthest from the epicenter (degree) 1.08998
Number of stations at which the event was observed 12
Number of stations from which data was used for origin computation 12
Magnitudes information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.3
Num. used stations 16
Type of magnitude ML
Reference to an origin 79546221
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-05-25 11:03:08

ML:1.5

Field Value
Value 1.5
Uncertainty 0.3
Num. used stations 18
Type of magnitude ML
Reference to an origin 78123681
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-04-11 21:52:43
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MEU.EHZ. 2020-04-11T21:45:25.01 0.3 undecidable manual S 169 73.2711 100 0.25 69
IV.HAGA.HHZ. 2020-04-11T21:45:23.90 0.3 undecidable manual S 141 67.8765 101 0.56 64
IV.HPAC.HHZ. 2020-04-11T21:45:22.57 0.3 undecidable manual P 164 120.99 95 -0.09 64
IV.HLNI.HHZ. 2020-04-11T21:45:18.26 0.3 undecidable manual S 158 48.9177 106 -0.16 73
IV.SSY.HHZ. 2020-04-11T21:45:15.37 0.3 undecidable manual P 152 75.6687 99 -0.36 66
IV.MUCR.HHZ. 2020-04-11T21:45:15.32 0.1 undecidable manual S 30 36.3414 112 0.09 100
IV.HAGA.HHZ. 2020-04-11T21:45:14.13 0.3 undecidable manual P 141 67.8765 101 -0.41 67
IV.RAFF.HHZ. 2020-04-11T21:45:14.18 0.3 undecidable manual P 204 65.2902 101 0.04 73
IV.MEU.EHZ. 2020-04-11T21:45:14.83 0.3 undecidable manual P 169 73.2711 100 -0.53 64
IV.MSFR.HHZ. 2020-04-11T21:45:13.63 0.1 undecidable manual S 348 31.2465 116 -0.35 97
IV.CAGR.HHN. 2020-04-11T21:45:12.22 0.6 undecidable manual S 224 21.0678 129 0.52 48
IV.PETRA.HHZ. 2020-04-11T21:45:11.70 0.6 undecidable manual P 280 49.1175 106 -0.02 50
IV.HLNI.HHZ. 2020-04-11T21:45:11.34 0.3 undecidable manual P 158 48.9177 106 -0.35 70
MN.VAE.HHE. 2020-04-11T21:45:11.36 0.3 undecidable manual P 221 42.3243 109 0.63 66
IV.MUCR.HHZ. 2020-04-11T21:45:10.31 0.1 positive manual P 30 36.3414 112 0.46 93
IV.MSFR.HHZ. 2020-04-11T21:45:09.15 0.3 undecidable manual P 348 31.2465 116 0.01 78
IV.GALF.HHZ. 2020-04-11T21:45:09.62 0.3 undecidable manual S 239 10.2786 151 -0.19 78
IV.CAGR.HHN. 2020-04-11T21:45:08.29 0.3 undecidable manual P 224 21.0678 129 0.47 72
IV.GALF.HHZ. 2020-04-11T21:45:06.15 0.6 undecidable manual P 239 10.2786 151 -0.58 47
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.GALF.HHN. ML:1.6 0.0002815 0.46 AML other m 2020-04-11T21:45:12.19
IV.GALF.HHE. ML:1.6 0.0003125 0.4 AML other m 2020-04-11T21:45:12.91
IV.MSFR.HHN. ML:0.8 0.000025500000000000003 0.88 AML other m 2020-04-11T21:45:15.32
IV.MSFR.HHE. ML:0.8 0.0000253 0.8 AML other m 2020-04-11T21:45:15.27
IV.MUCR.HHE. ML:1.3 0.00006405 0.64 AML other m 2020-04-11T21:45:16.54
IV.MUCR.HHN. ML:1.4 0.0000732 1.22 AML other m 2020-04-11T21:45:17.29
IV.HLNI.HHE. ML:1.4 0.00006654999999999999 0.48 AML other m 2020-04-11T21:45:19.40
IV.HLNI.HHN. ML:1.4 0.00006670000000000001 0.72 AML other m 2020-04-11T21:45:22.59
IV.PETRA.HHN. ML:1.2 0.000032850000000000006 0.84 AML other m 2020-04-11T21:45:22.44
IV.PETRA.HHE. ML:1.1 0.0000286 0.42 AML other m 2020-04-11T21:45:23.32
IV.HAGA.HHN. ML:1.7 0.00008995 0.58 AML other m 2020-04-11T21:45:24.00
IV.HAGA.HHE. ML:1.7 0.00008815 0.52 AML other m 2020-04-11T21:45:25.05
IV.RAFF.HHE. ML:1.4 0.0000423 0.84 AML other m 2020-04-11T21:45:26.90
IV.MEU.EHN. ML:1.9 0.0001315 1.7 AML other m 2020-04-11T21:45:26.86
IV.RAFF.HHN. ML:1.5 0.0000511 0.86 AML other m 2020-04-11T21:45:27.14
IV.MEU.EHE. ML:1.8 0.00009025 1.64 AML other m 2020-04-11T21:45:31.92
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