Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.3 on date 20-07-2015 and time 07:26:53 (UTC) in region 4 km SE Troina (EN)

A magnitude ML 1.3 earthquake occured in region: 4 km SE Troina (EN), on

  • 20-07-2015 07:26:53 (UTC)
  • 20-07-2015 09:26:53 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.7490, 14.6200 at 38 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 5 9373 9373
Gagliano Castelferrato EN 8 3593 12966
Regalbuto EN 11 7277 20243
Cerami EN 12 2006 22249
Agira EN 13 8345 30594
San Teodoro ME 13 1403 31997
Cesarò ME 14 2439 34436
Capizzi ME 17 3176 37612
Centuripe EN 18 5470 43082
Nissoria EN 18 3000 46082
Bronte CT 19 19172 65254
Nicosia EN 19 13899 79153

Municipalities with at least 50000 inhabitants

An earthquake occurred to
49 Km NW of Catania (314555 inhabitants)
51 Km W of Acireale (52622 inhabitants)
57 Km NE of Caltanissetta (63360 inhabitants)
83 Km NE of Gela (75827 inhabitants)
89 Km N of Vittoria (63339 inhabitants)
92 Km N of Ragusa (73313 inhabitants)
96 Km SW of Messina (238439 inhabitants)
97 Km NW of Siracusa (122291 inhabitants)
98 Km W of Reggio di Calabria (183035 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 1.3 2015-07-20
07:26:53		 37.7487 14.6198 38 2016-01-08
08:53:02		 Bollettino Sismico Italiano INGV 22096871
Reviewed
Rev100 		ML 1.3 2015-07-20
07:26:53		 37.7057 14.4585 10 2015-07-20
07:37:04		 Sala Sismica INGV-Roma 20395361
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2015-07-20 07:26:53 ± 0.49
Latitude 37.7487 ± 0.0144
Longitude 14.6198 ± 0.0387
Depth (km) 38 ± 3 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 22096871

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 3319
Semi-minor axis of confidence ellipse (meter) 954
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 266
Circular confidence region, given by single value of horizontal uncertainty (meter) 3320.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 203
Number of associated phases, regardless of their use for origin computation 9
Number of defining phases 9
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) 0.19156
Epicentral distance of station farthest from the epicenter (degree) 0.44696
Number of stations at which the event was observed 5
Number of stations from which data was used for origin computation 5
Magnitudes information

ML:1.3

Field Value
Value 1.3
Uncertainty 0.1
Num. used stations 3
Type of magnitude ML
Reference to an origin 22096871
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2015-11-05 09:22:43

ML:1.3

Field Value
Value 1.3
Uncertainty 0.1
Num. used stations 3
Type of magnitude ML
Reference to an origin 20395361
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2015-07-20 07:37:04
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.HLNI.HHZ. 2015-07-20T07:27:11.35 0.6 undecidable manual S 153 49.617 124 -0.03 49
IV.MSFR.HHZ. 2015-07-20T07:27:08.24 0.6 undecidable manual S 356 31.746 137 0.52 46
IV.EPZF.HHZ. 2015-07-20T07:27:06.79 0.6 undecidable manual S 68 22.3554 147 0.61 44
IV.MNO.SHZ. 2015-07-20T07:27:05.42 0.3 undecidable manual S 18 21.2676 148 -0.6 66
IV.HLNI.HHZ. 2015-07-20T07:27:03.82 0.3 undecidable manual P 153 49.617 124 0.02 73
IV.MUCR.HHZ. 2015-07-20T07:27:02.56 0.3 undecidable manual P 34 39.5271 130 0.01 75
IV.MSFR.HHZ. 2015-07-20T07:27:01.93 0.3 undecidable manual P 356 31.746 137 0.24 73
IV.MNO.SHZ. 2015-07-20T07:27:00.55 0.1 undecidable manual P 18 21.2676 148 -0.16 99
IV.EPZF.HHZ. 2015-07-20T07:27:00.66 0.1 undecidable manual P 68 22.3554 147 -0.14 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.HLNI.HHE. ML:1.4 0.0000557 1.54 AML other m 2015-07-20T07:27:12.07
IV.HLNI.HHN. ML:1.2 0.0000344 0.52 AML other m 2015-07-20T07:27:12.95
IV.MNO.SHE. ML:0.0 0.0001194 0.4 AML other m 2015-07-20T07:27:05.76
IV.MNO.SHN. ML:0.0 0.0001053 0.52 AML other m 2015-07-20T07:27:05.88
IV.MUCR.HHE. ML:1.4 0.000054800000000000004 0.88 AML other m 2015-07-20T07:27:08.39
IV.MUCR.HHN. ML:1.3 0.000050950000000000005 0.3 AML other m 2015-07-20T07:27:09.23
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