Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.8 on date 22-04-2020 and time 14:17:54 (UTC) in region 5 km SE Troina (EN)

A magnitude ML 1.8 earthquake occured in region: 5 km SE Troina (EN), on

  • 22-04-2020 14:17:54 (UTC)
  • 22-04-2020 16:17:54 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.7470, 14.6250 at 24 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 9 3593 12966
Regalbuto EN 11 7277 20243
Cerami EN 13 2006 22249
San Teodoro ME 13 1403 23652
Cesarò ME 13 2439 26091
Agira EN 13 8345 34436
Capizzi ME 17 3176 37612
Centuripe EN 17 5470 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)
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)
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 1.8 2020-04-22
14:17:54		 37.7473 14.6247 25 2020-07-18
21:08:41		 Bollettino Sismico Italiano INGV 80437481
Reviewed
Rev100 		ML 1.9 2020-04-22
14:17:54		 37.752 14.595 28 2020-04-22
14:29:29		 Sala Sismica INGV-Roma 78474251
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-04-22 14:17:54 ± 0.23
Latitude 37.7473 ± 0.0081
Longitude 14.6247 ± 0.0125
Depth (km) 25 ± 3 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 80437481

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1090
Semi-minor axis of confidence ellipse (meter) 217
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 106
Circular confidence region, given by single value of horizontal uncertainty (meter) 1090.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 62
Number of associated phases, regardless of their use for origin computation 28
Number of defining phases 28
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.45
Epicentral distance of station closest to the epicenter (degree) 0.05846
Epicentral distance of station farthest from the epicenter (degree) 0.86605
Number of stations at which the event was observed 18
Number of stations from which data was used for origin computation 18
Magnitudes information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.2
Num. used stations 11
Type of magnitude ML
Reference to an origin 80437481
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-06-23 10:02:00

ML:1.9

Field Value
Value 1.9
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 78474251
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-04-22 14:29:29
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MPNC.HHZ. 2020-04-22T14:18:19.82 1.0 undecidable manual S 55 77.5668 102 1.34 14
IV.SSY.HNN. 2020-04-22T14:18:18.58 0.6 undecidable manual S 149 76.4679 102 0.39 44
IV.RAFF.HHZ. 2020-04-22T14:18:16.34 1.0 undecidable manual S 202 62.5929 105 1.74 12
IV.HAGA.HHZ. 2020-04-22T14:18:16.14 0.6 undecidable manual S 138 69.375 103 -0.2 47
IV.AIO.HHE. 2020-04-22T14:18:15.15 1.0 undecidable manual S 65 58.7967 106 1.54 13
IV.HVZN.HNZ. 2020-04-22T14:18:15.65 0.6 undecidable manual S 173 63.6918 105 0.79 40
IV.HLNI.HHE. 2020-04-22T14:18:11.40 0.3 undecidable manual S 154 49.3173 110 0.19 73
IV.MSRU.HHE. 2020-04-22T14:18:11.64 0.6 undecidable manual P 53 96.126 99 0.28 43
IV.MUCR.HHZ. 2020-04-22T14:18:08.52 0.3 undecidable manual S 34 39.4272 115 -0.23 75
IV.MPNC.HHZ. 2020-04-22T14:18:08.78 0.1 undecidable manual P 55 77.5668 102 0.24 90
IV.SSY.HNN. 2020-04-22T14:18:07.60 0.3 undecidable manual P 149 76.4679 102 -0.77 58
IV.MSFR.HHZ. 2020-04-22T14:18:07.35 0.6 undecidable manual S 355 31.9458 121 0.36 48
IV.HVZN.HNZ. 2020-04-22T14:18:06.16 0.3 undecidable manual P 173 63.6918 105 -0.29 69
IV.HAGA.HHZ. 2020-04-22T14:18:06.46 0.3 undecidable manual P 138 69.375 103 -0.84 57
IV.AIO.HHE. 2020-04-22T14:18:06.07 0.3 undecidable manual P 65 58.7967 106 0.34 68
IV.GIB.HHE. 2020-04-22T14:18:06.92 0.3 undecidable manual P 297 58.8966 106 1.17 50
IV.RAFF.HHZ. 2020-04-22T14:18:06.41 0.1 undecidable manual P 202 62.5929 105 0.11 97
IV.EPZF.HHZ. 2020-04-22T14:18:05.25 1.0 undecidable manual S 67 22.0668 133 0.37 24
IV.CSLB.HHZ. 2020-04-22T14:18:04.64 0.1 undecidable manual P 293 53.9016 108 -0.37 92
IV.HLNI.HHE. 2020-04-22T14:18:03.73 0.3 undecidable manual P 154 49.3173 110 -0.61 65
MN.VAE.HHZ. 2020-04-22T14:18:03.89 0.6 undecidable manual P 218 39.0276 115 1.02 38
IV.MUCR.HHZ. 2020-04-22T14:18:02.49 0.1 undecidable manual P 34 39.4272 115 -0.43 95
IV.MSFR.HHZ. 2020-04-22T14:18:01.38 0.1 undecidable manual P 355 31.9458 121 -0.52 94
IV.ESML.HHE. 2020-04-22T14:18:01.37 0.3 undecidable manual P 123 26.5512 127 0.15 76
IV.EMSG.HHZ. 2020-04-22T14:18:01.92 0.3 undecidable manual P 74 29.6481 123 0.31 73
IV.CAGR.HHZ. 2020-04-22T14:18:00.56 0.1 undecidable manual P 218 17.6712 140 0.34 100
IV.EPZF.HHZ. 2020-04-22T14:18:00.71 0.3 undecidable manual P 67 22.0668 133 0.03 78
IV.GALF.HHZ. 2020-04-22T14:17:58.42 0.1 negative manual P 231 6.4935 163 -0.96 80
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.GALF.HHE. ML:2.1 0.0007709397499999999 1.7632 AML other m 2020-04-22T14:18:05.09
IV.GALF.HNN. ML:1.3 0.00011674835499999999 0.8064 AML other m 2020-04-22T14:18:05.74
IV.CAGR.HHE. ML:1.8 0.0003360249 0.544 AML other m 2020-04-22T14:18:07.63
IV.CAGR.HHN. ML:1.8 0.0002868293 1.3984 AML other m 2020-04-22T14:18:09.25
IV.EPZF.HHN. ML:2.0 0.0004055824 0.5184 AML other m 2020-04-22T14:18:10.66
IV.EPZF.HHE. ML:1.7 0.0002296798 0.9024 AML other m 2020-04-22T14:18:00.98
IV.MUCR.HHN. ML:1.8 0.00018487419999999998 1.7184 AML other m 2020-04-22T14:18:08.90
IV.MUCR.HHE. ML:1.6 0.000123063685 0.2752 AML other m 2020-04-22T14:18:08.77
IV.MPNC.HHN. ML:1.8 0.00009401908500000001 0.6016 AML other m 2020-04-22T14:18:21.22
IV.MPNC.HHE. ML:1.8 0.000089582145 0.7616 AML other m 2020-04-22T14:18:28.42
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