Earthquake with magnitude of ML 1.6 on date 17-04-2020 and time 17:55:17 (Italy) in region 5 km SE Troina (EN)

A magnitude ML 1.6 earthquake occured in region: 5 km SE Troina (EN), on

  • 17-04-2020 15:55:17 (UTC)
  • 17-04-2020 17:55:17 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.74, 14.62 at 23 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.

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 10 7277 20243
Cerami EN 13 2006 22249
Agira EN 13 8345 30594
San Teodoro ME 14 1403 31997
CesarĂ² ME 14 2439 34436
Centuripe EN 17 5470 39906
Capizzi ME 17 3176 43082
Nissoria EN 18 3000 46082
Bronte CT 19 19172 65254
Nicosia EN 20 13899 79153

Municipalities with at least 50000 inhabitants

An earthquake occurred to
49 Km NW of Catania (314555 inhabitants)
50 Km W of Acireale (52622 inhabitants)
57 Km NE of Caltanissetta (63360 inhabitants)
82 Km NE of Gela (75827 inhabitants)
89 Km N of Vittoria (63339 inhabitants)
91 Km N of Ragusa (73313 inhabitants)
96 Km SW of Messina (238439 inhabitants)
96 Km NW of Siracusa (122291 inhabitants)
99 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 1.6 2020-04-17
15:55:17
37.74 14.62 23 2020-07-18
21:08:35
Bollettino Sismico Italiano INGV 78857901
Reviewed
Rev100
ML 1.8 2020-04-17
15:55:17
37.75 14.61 26 2020-04-17
16:02:42
Sala Sismica INGV-Roma 78324321
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-04-17 15:55:17 ± 0.28
Latitude 37.74 ± 0.01
Longitude 14.62 ± 0.03
Depth (km) 23 ± 3 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 78857901

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1727
Semi-minor axis of confidence ellipse (meter) 1414
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 283
Circular confidence region, given by single value of horizontal uncertainty (meter) 1730
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 122
Number of associated phases, regardless of their use for origin computation 17
Number of defining phases 15
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.47
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.68618
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 9
Magnitudes information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.3
Num. used stations 10
Type of magnitude ML
Reference to an origin 78857901
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-05-05 08:44:15

ML:1.8

Field Value
Value 1.8
Uncertainty 0.3
Num. used stations 14
Type of magnitude ML
Reference to an origin 78324321
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-04-17 16:02:42
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.SSY.HHZ. 2020-04-17T15:55:41.35 0.3 undecidable manual S 148 0.6862 101 0.68 60
IV.MEU.EHZ. 2020-04-17T15:55:40.16 0.3 undecidable manual S 165 0.6529 101 0.46 66
IV.SOI.EHZ. 2020-04-17T15:55:37.46 3.0 positive manual P -0.75 0
IV.HLNI.HHZ. 2020-04-17T15:55:33.80 0.3 undecidable manual S 153 0.4416 108 0.17 73
IV.MUCR.HHZ. 2020-04-17T15:55:31.45 0.3 undecidable manual S 34 0.3597 112 0.09 75
IV.MSFR.HHZ. 2020-04-17T15:55:30.19 0.3 undecidable manual S 355 0.2914 118 0.66 66
IV.SSY.HHZ. 2020-04-17T15:55:30.33 0.1 undecidable manual P 148 0.6862 101 -0.59 84
IV.MEU.EHZ. 2020-04-17T15:55:29.76 0.1 undecidable manual P 165 0.6529 101 -0.6 84
IV.RAFF.HHZ. 2020-04-17T15:55:29.22 0.1 undecidable manual P 202 0.5594 103 0.43 90
IV.HLNI.HHZ. 2020-04-17T15:55:26.25 0.3 undecidable manual P 153 0.4416 108 -0.6 66
IV.ESML.HHZ. 2020-04-17T15:55:25.43 3.0 undecidable manual S -0.29 0
IV.MUCR.HHZ. 2020-04-17T15:55:25.24 0.1 positive manual P 34 0.3597 112 -0.31 97
IV.MSFR.HHZ. 2020-04-17T15:55:24.30 0.1 negative manual P 355 0.2914 118 -0.19 100
IV.GALF.HHZ. 2020-04-17T15:55:24.71 0.3 undecidable manual S 233 0.054 164 -0.12 79
IV.CAGR.HHE. 2020-04-17T15:55:23.38 0.3 undecidable manual P 219 0.1547 138 0.76 66
IV.EPZF.HHZ. 2020-04-17T15:55:23.64 0.3 undecidable manual P 66 0.2032 129 0.42 72
IV.GALF.HHZ. 2020-04-17T15:55:21.23 0.1 negative manual P 233 0.054 164 -0.54 95
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.GALF.HHN. ML:1.9 0.0005755 1.72 AML other m 2020-04-17T15:55:25.95
IV.GALF.HHE. ML:1.9 0.000531 1.38 AML other m 2020-04-17T15:55:27.15
IV.MSFR.HHE. ML:1.1 4.305E-5 0.82 AML other m 2020-04-17T15:55:30.25
IV.MSFR.HHN. ML:1 3.965E-5 1.38 AML other m 2020-04-17T15:55:31.74
IV.MUCR.HHN. ML:1.6 0.0001095 1.32 AML other m 2020-04-17T15:55:31.27
IV.MUCR.HHE. ML:1.6 0.0001225 1.22 AML other m 2020-04-17T15:55:32.08
IV.HLNI.HHE. ML:1.6 8.39E-5 0.72 AML other m 2020-04-17T15:55:34.34
IV.HLNI.HHN. ML:1.6 8.72E-5 0.28 AML other m 2020-04-17T15:55:35.48
IV.MEU.EHN. ML:2.1 0.0001965 0.68 AML other m 2020-04-17T15:55:41.84
IV.RAFF.HHN. ML:1.6 8.14E-5 1.28 AML other m 2020-04-17T15:55:42.14
IV.RAFF.HHE. ML:1.8 0.0001027 1.06 AML other m 2020-04-17T15:55:42.16
IV.MEU.EHE. ML:1.9 0.0001315 0.74 AML other m 2020-04-17T15:55:44.11
IV.SSY.HHN. ML:2.5 0.0004035 0.4 AML other m 2020-04-17T15:55:45.33
IV.SSY.HHE. ML:2.2 0.0002095 0.9 AML other m 2020-04-17T15:55:46.16
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download