Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.5 on date 20-04-2016 and time 08:09:44 (Italy) in region 6 km NE Ragalna (CT)

A magnitude ML 1.5 earthquake occured in region: 6 km NE Ragalna (CT), on

  • 20-04-2016 06:09:44 (UTC)
  • 20-04-2016 08:09:44 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.6750, 14.9810 at 17 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
Ragalna CT 6 3924 3924
Nicolosi CT 8 7463 11387
Belpasso CT 9 28108 39495
Pedara CT 9 14102 53597
Biancavilla CT 10 24007 77604
Santa Maria di Licodia CT 10 7641 85245
Trecastagni CT 11 10910 96155
Zafferana Etnea CT 11 9517 105672
San Pietro Clarenza CT 12 7743 113415
Camporotondo Etneo CT 12 5023 118438
Viagrande CT 12 8563 127001
Paternò CT 13 48228 175229
Mascalucia CT 13 31958 207187
Adrano CT 13 36122 243309
Milo CT 13 1087 244396
Tremestieri Etneo CT 14 20589 264985
Santa Venerina CT 14 8592 273577
Aci Bonaccorsi CT 14 3524 277101
Gravina di Catania CT 15 25838 302939
San Giovanni la Punta CT 15 23060 325999
Aci Sant'Antonio CT 15 17984 343983
Sant'Agata li Battiati CT 16 9479 353462
Aci Catena CT 16 29851 383313
Sant'Alfio CT 16 1582 384895
Valverde CT 17 7840 392735
San Gregorio di Catania CT 17 11966 404701
Misterbianco CT 17 49410 454111
Acireale CT 18 52622 506733
Motta Sant'Anastasia CT 18 12116 518849
Bronte CT 18 19172 538021
Giarre CT 19 27659 565680
Aci Castello CT 20 18723 584403
Maletto CT 20 3920 588323

Municipalities with at least 50000 inhabitants

An earthquake occurred to
18 Km W of Acireale (52622 inhabitants)
21 Km NW of Catania (314555 inhabitants)
74 Km NW of Siracusa (122291 inhabitants)
76 Km SW of Reggio di Calabria (183035 inhabitants)
77 Km SW of Messina (238439 inhabitants)
83 Km E of Caltanissetta (63360 inhabitants)
86 Km N of Ragusa (73313 inhabitants)
90 Km NE of Vittoria (63339 inhabitants)
93 Km N of Modica (54633 inhabitants)
93 Km NE of Gela (75827 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 1.5 2016-04-20
06:09:44		 37.6748 14.9807 17 2016-05-17
13:18:32		 Bollettino Sismico Italiano INGV 24670631
Reviewed
Rev100 		ML 1.5 2016-04-20
06:09:44		 37.6608 14.9693 16 2016-04-20
06:24:43		 Sala Sismica INGV-Roma 24499471
Reviewed
Rev100 		ML 1.4 2016-04-20
06:09:45		 37.6548 14.9488 13 2016-04-20
06:16:48		 Sala Sismica INGV-Roma 24499071
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2016-04-20 06:09:44 ± 0.14
Latitude 37.6748 ± 0.0045
Longitude 14.9807 ± 0.0102
Depth (km) 17 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 24670631

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 704
Semi-minor axis of confidence ellipse (meter) 641
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 92
Circular confidence region, given by single value of horizontal uncertainty (meter) 700.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 64
Number of associated phases, regardless of their use for origin computation 20
Number of defining phases 20
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.27
Epicentral distance of station closest to the epicenter (degree) 0.01889
Epicentral distance of station farthest from the epicenter (degree) 0.52251
Number of stations at which the event was observed 13
Number of stations from which data was used for origin computation 13
Magnitudes information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.3
Num. used stations 3
Type of magnitude ML
Reference to an origin 24499471
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2016-04-20 06:24:43

ML:1.4

Field Value
Value 1.4
Uncertainty 0.3
Num. used stations 3
Type of magnitude ML
Reference to an origin 24499071
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2016-04-20 06:16:48

ML:1.5

Field Value
Value 1.5
Uncertainty 0.2
Num. used stations 3
Type of magnitude ML
Reference to an origin 24670631
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2016-04-27 14:00:00
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.SSY.HHZ. 2016-04-20T06:10:03.66 0.6 undecidable manual S 172 57.9975 98 0.83 36
IV.AGST.EHE. 2016-04-20T06:10:01.02 0.6 undecidable manual S 155 51.2154 99 -0.03 47
IV.HAGA.HHE. 2016-04-20T06:10:00.41 0.6 undecidable manual S 160 45.9207 100 0.76 38
IV.HLNI.HHZ. 2016-04-20T06:09:57.13 0.3 undecidable manual S 195 37.4292 103 -0.31 67
IV.SSY.HHZ. 2016-04-20T06:09:55.17 0.1 undecidable manual P 172 57.9975 98 -0.04 92
IV.AGST.EHE. 2016-04-20T06:09:54.04 0.3 undecidable manual P 155 51.2154 99 -0.14 69
IV.EPZF.HHZ. 2016-04-20T06:09:53.42 0.3 undecidable manual S 327 19.7691 121 0.39 69
IV.HAGA.HHE. 2016-04-20T06:09:53.48 0.6 undecidable manual P 160 45.9207 100 0.11 46
IV.MUCR.HHE. 2016-04-20T06:09:52.84 0.6 undecidable manual P 347 41.9247 102 0.08 46
IV.AIO.HHE. 2016-04-20T06:09:52.62 0.1 undecidable manual P 34 39.627 102 0.2 90
IV.NOV.HHE. 2016-04-20T06:09:52.93 0.6 undecidable manual P 19 41.4252 102 0.23 45
IV.MNO.SHE. 2016-04-20T06:09:52.28 0.3 undecidable manual P 319 37.8288 103 0.12 69
IV.GALF.HHZ. 2016-04-20T06:09:51.97 0.6 undecidable manual P 276 36.5412 104 0.01 48
IV.ESML.HHZ. 2016-04-20T06:09:51.44 0.3 undecidable manual S 235 10.878 141 0.21 73
IV.HLNI.HHZ. 2016-04-20T06:09:51.78 0.3 undecidable manual P 195 37.4292 103 -0.32 68
IV.ESLN.HHZ. 2016-04-20T06:09:50.20 0.3 undecidable manual S 345 2.0979 172 -0.08 74
IV.EPZF.HHZ. 2016-04-20T06:09:49.24 0.1 undecidable manual P 327 19.7691 121 -0.31 93
IV.EPOZ.HHZ. 2016-04-20T06:09:48.82 0.3 undecidable manual P 91 18.2706 124 -0.53 67
IV.ESML.HHZ. 2016-04-20T06:09:48.53 0.1 undecidable manual P 235 10.878 141 0.02 100
IV.ESLN.HHZ. 2016-04-20T06:09:47.62 0.1 undecidable manual P 345 2.0979 172 -0.34 94
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.EPZF.HHE. ML:1.8 0.000345 0.28 AML other m 2016-04-20T06:09:54.17
IV.EPZF.HHN. ML:1.8 0.0003625 1.16 AML other m 2016-04-20T06:09:55.46
IV.ESML.HHN. ML:1.4 0.000216 0.86 AML other m 2016-04-20T06:09:53.83
IV.ESML.HHE. ML:1.4 0.00023649999999999998 0.26 AML other m 2016-04-20T06:09:56.49
IV.GALF.HHE. ML:1.3 0.00006604999999999999 0.38 AML other m 2016-04-20T06:10:01.11
IV.GALF.HHN. ML:1.2 0.0000605 1.08 AML other m 2016-04-20T06:10:11.21
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