Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.3 on date 18-04-2020 and time 05:37:26 (Italy) in region 6 km SE Troina (EN)

A magnitude ML 1.3 earthquake occured in region: 6 km SE Troina (EN), on

  • 18-04-2020 03:37:26 (UTC)
  • 18-04-2020 05:37:26 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.7480, 14.6480 at 22 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
Regalbuto EN 11 7277 16650
Gagliano Castelferrato EN 11 3593 20243
San Teodoro ME 12 1403 21646
Cesarò ME 12 2439 24085
Cerami EN 14 2006 26091
Agira EN 15 8345 34436
Centuripe EN 16 5470 39906
Bronte CT 17 19172 59078
Capizzi ME 19 3176 62254
Adrano CT 19 36122 98376
Maniace CT 19 3765 102141

Municipalities with at least 50000 inhabitants

An earthquake occurred to
47 Km NW of Catania (314555 inhabitants)
48 Km W of Acireale (52622 inhabitants)
59 Km NE of Caltanissetta (63360 inhabitants)
84 Km NE of Gela (75827 inhabitants)
89 Km N of Vittoria (63339 inhabitants)
92 Km N of Ragusa (73313 inhabitants)
94 Km SW of Messina (238439 inhabitants)
95 Km NW of Siracusa (122291 inhabitants)
96 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 1.3 2020-04-18
03:37:26		 37.7477 14.648 22 2020-07-18
21:08:36		 Bollettino Sismico Italiano INGV 79105241
Reviewed
Rev100 		ML 1.6 2020-04-18
03:37:26		 37.7433 14.5915 17 2020-04-18
03:48:47		 Sala Sismica INGV-Roma 78340481
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-04-18 03:37:26 ± 0.27
Latitude 37.7477 ± 0.0081
Longitude 14.6480 ± 0.0136
Depth (km) 22 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 79105241

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1136
Semi-minor axis of confidence ellipse (meter) 372
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 91
Circular confidence region, given by single value of horizontal uncertainty (meter) 1140.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 67
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) 0.34
Epicentral distance of station closest to the epicenter (degree) 0.07464
Epicentral distance of station farthest from the epicenter (degree) 0.67899
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 9
Magnitudes information

ML:1.3

Field Value
Value 1.3
Uncertainty 0.3
Num. used stations 6
Type of magnitude ML
Reference to an origin 79105241
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-06-12 12:03:42

ML:1.6

Field Value
Value 1.6
Uncertainty 0.5
Num. used stations 4
Type of magnitude ML
Reference to an origin 78340481
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-04-18 03:48:47
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.HLNI.HHZ. 2020-04-18T03:37:43.40 0.3 undecidable manual S 156 48.4182 107 0.64 64
IV.MUCR.HHE. 2020-04-18T03:37:40.40 0.6 undecidable manual S 31 38.2284 113 0.2 48
IV.SSY.HHZ. 2020-04-18T03:37:40.03 0.1 undecidable manual P 150 75.369 100 -0.07 92
IV.CAGR.HHZ. 2020-04-18T03:37:36.24 0.6 undecidable manual S 223 19.0698 134 0.38 48
IV.ESML.HHZ. 2020-04-18T03:37:36.56 0.3 undecidable manual S 125 24.8529 125 -0.5 68
IV.PLLN.EHE. 2020-04-18T03:37:36.27 1.0 undecidable manual P 302 51.9036 106 -0.3 23
IV.EPZF.HHE. 2020-04-18T03:37:36.13 0.3 undecidable manual S 65 20.1687 132 0.05 78
IV.HLNI.HHZ. 2020-04-18T03:37:35.74 0.1 undecidable manual P 156 48.4182 107 -0.32 92
IV.MUCR.HHE. 2020-04-18T03:37:34.60 0.1 undecidable manual P 31 38.2284 113 0.02 100
IV.MSFR.HHZ. 2020-04-18T03:37:33.51 0.1 undecidable manual P 351 32.1456 117 -0.22 98
IV.ESML.HHZ. 2020-04-18T03:37:33.01 0.6 undecidable manual P 125 24.8529 125 0.24 49
IV.GALF.HHZ. 2020-04-18T03:37:33.88 0.6 undecidable manual S 240 8.2806 157 -0.32 50
IV.CAGR.HHZ. 2020-04-18T03:37:32.63 0.1 undecidable manual P 223 19.0698 134 0.56 91
IV.EPZF.HHE. 2020-04-18T03:37:32.39 0.1 undecidable manual P 65 20.1687 132 0.19 100
IV.GALF.HHZ. 2020-04-18T03:37:30.51 0.3 undecidable manual P 240 8.2806 157 -0.61 69
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.GALF.HNN. ML:1.1 0.000089052575 0.7904 AML other m 2020-04-18T03:37:32.59
IV.GALF.HHN. ML:1.5 0.0001933228 0.2592 AML other m 2020-04-18T03:37:34.36
IV.GALF.HHE. ML:1.3 0.00014912295 0.3408 AML other m 2020-04-18T03:37:35.11
IV.GALF.HNE. ML:1.0 0.00007443248 0.4896 AML other m 2020-04-18T03:37:35.55
IV.HLNI.HHN. ML:1.2 0.0000338 0.12 AML other m 2020-04-18T03:37:44.90
IV.SSY.HHN. ML:2.2 0.00022159614999999998 0.4 AML other m 2020-04-18T03:37:52.34
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