Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.7 on date 22-04-2020 and time 19:07:52 (Italy) in region 4 km S Troina (EN)

A magnitude ML 1.7 earthquake occured in region: 4 km S Troina (EN), on

  • 22-04-2020 17:07:52 (UTC)
  • 22-04-2020 19:07:52 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.7460, 14.5970 at 26 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 7 3593 12966
Cerami EN 11 2006 14972
Regalbuto EN 11 7277 22249
Agira EN 12 8345 30594
San Teodoro ME 15 1403 31997
Cesarò ME 15 2439 34436
Capizzi ME 16 3176 37612
Nissoria EN 16 3000 40612
Nicosia EN 17 13899 54511
Centuripe EN 19 5470 59981
Assoro EN 20 5191 65172

Municipalities with at least 50000 inhabitants

An earthquake occurred to
51 Km NW of Catania (314555 inhabitants)
52 Km W of Acireale (52622 inhabitants)
55 Km NE of Caltanissetta (63360 inhabitants)
82 Km NE of Gela (75827 inhabitants)
89 Km N of Vittoria (63339 inhabitants)
92 Km N of Ragusa (73313 inhabitants)
98 Km SW of Messina (238439 inhabitants)
98 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 1.7 2020-04-22
17:07:52		 37.7458 14.5972 26 2020-07-18
21:08:42		 Bollettino Sismico Italiano INGV 80979181
Reviewed
Rev100 		ML 1.7 2020-04-22
17:07:52		 37.7458 14.6128 25 2020-04-22
17:52:35		 Sala Sismica INGV-Roma 78477491
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-04-22 17:07:52 ± 0.2
Latitude 37.7458 ± 0.0090
Longitude 14.5972 ± 0.0148
Depth (km) 26 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 80979181

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1256
Semi-minor axis of confidence ellipse (meter) 414
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 85
Circular confidence region, given by single value of horizontal uncertainty (meter) 1260.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 68
Number of associated phases, regardless of their use for origin computation 29
Number of defining phases 27
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.5
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.71766
Number of stations at which the event was observed 18
Number of stations from which data was used for origin computation 16
Magnitudes information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 78477491
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-04-22 17:52:35

ML:1.7

Field Value
Value 1.7
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 80979181
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-07-12 13:11:43
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CAFE.HHZ. 2020-04-22T17:09:30.00 3.0 undecidable manual Sg 1.03 0
IV.MMN.HHZ. 2020-04-22T17:08:35.27 3.0 positive manual Pg 1.31 0
IV.MPNC.HHE. 2020-04-22T17:08:17.90 0.6 undecidable manual S 56 79.6647 102 1.58 24
IV.SSY.HHZ. 2020-04-22T17:08:16.71 0.6 undecidable manual S 147 77.5668 103 0.93 35
IV.MEU.EHZ. 2020-04-22T17:08:14.88 0.6 undecidable manual S 164 73.371 104 0.2 44
IV.HAGA.HHE. 2020-04-22T17:08:13.56 0.3 undecidable manual S 136 70.8735 104 -0.48 63
IV.HVZN.HHE. 2020-04-22T17:08:12.71 0.6 undecidable manual S 171 63.7917 106 0.49 42
IV.AIO.HHE. 2020-04-22T17:08:12.85 0.6 undecidable manual S 66 61.0944 107 1.34 29
IV.HLNI.HHZ. 2020-04-22T17:08:08.87 0.3 undecidable manual S 151 50.3163 111 0.08 71
IV.MUCR.HHZ. 2020-04-22T17:08:06.14 0.6 undecidable manual S 36 40.9257 116 -0.34 46
IV.MPNC.HHE. 2020-04-22T17:08:06.35 0.3 undecidable manual P 56 79.6647 102 0.23 65
IV.SSY.HHZ. 2020-04-22T17:08:05.19 0.3 undecidable manual P 147 77.5668 103 -0.62 59
IV.MEU.EHZ. 2020-04-22T17:08:04.89 0.3 undecidable manual P 164 73.371 104 -0.28 65
IV.AIO.HHE. 2020-04-22T17:08:03.47 0.1 undecidable manual P 66 61.0944 107 0.13 91
IV.EPZF.HHE. 2020-04-22T17:08:03.80 0.6 undecidable manual S 69 24.3534 131 1.01 36
IV.RAFF.HHZ. 2020-04-22T17:08:03.60 0.3 undecidable manual P 200 61.5939 106 0.17 68
IV.HVZN.HHE. 2020-04-22T17:08:03.25 0.3 undecidable manual P 171 63.7917 106 -0.5 63
IV.HAGA.HHE. 2020-04-22T17:08:03.93 0.3 undecidable manual P 136 70.8735 104 -0.87 54
IV.CSLB.HHE. 2020-04-22T17:08:02.17 0.3 undecidable manual P 294 51.8037 110 0.19 69
IV.PETRA.HHE. 2020-04-22T17:08:01.79 0.3 undecidable manual P 283 43.4232 114 1 53
IV.HLNI.HHZ. 2020-04-22T17:08:01.11 0.1 undecidable manual P 151 50.3163 111 -0.66 81
IV.CAGR.HHZ. 2020-04-22T17:08:01.54 0.6 undecidable manual S 212 16.1727 144 0.23 49
MN.VAE.HHE. 2020-04-22T17:08:01.38 0.3 undecidable manual P 215 37.4292 118 1.41 44
IV.MUCR.HHZ. 2020-04-22T17:08:00.03 0.1 undecidable manual P 36 40.9257 116 -0.41 90
IV.GALF.HHZ. 2020-04-22T17:07:59.36 0.6 undecidable manual S 214 4.6953 168 -0.7 43
IV.EPZF.HHE. 2020-04-22T17:07:58.33 0.1 undecidable manual P 69 24.3534 131 0.03 100
IV.MSFR.HHZ. 2020-04-22T17:07:58.91 0.1 undecidable manual P 359 31.9458 123 -0.32 93
IV.CAGR.HHZ. 2020-04-22T17:07:57.88 0.1 undecidable manual P 212 16.1727 144 0.43 94
IV.GALF.HHZ. 2020-04-22T17:07:55.94 0.1 undecidable manual P 214 4.6953 168 -0.79 83
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.GALF.HHE. ML:2.0 0.0006194999999999999 1.56 AML other m 2020-04-22T17:08:01.18
IV.GALF.HHN. ML:1.9 0.0004625 1 AML other m 2020-04-22T17:08:01.18
IV.CAGR.HHE. ML:1.6 0.0001965 1.3 AML other m 2020-04-22T17:08:05.79
IV.CAGR.HHN. ML:1.6 0.000212 1.16 AML other m 2020-04-22T17:08:05.18
IV.MUCR.HHN. ML:1.6 0.0001111 1.38 AML other m 2020-04-22T17:08:06.05
IV.MUCR.HHE. ML:1.6 0.000112 0.96 AML other m 2020-04-22T17:08:08.45
IV.HLNI.HHE. ML:1.6 0.0000793 0.84 AML other m 2020-04-22T17:08:09.07
IV.HLNI.HHN. ML:1.6 0.00008340000000000001 0.8 AML other m 2020-04-22T17:08:09.46
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