Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.4 on date 30-04-2018 and time 20:07:39 (UTC) in region 4 km NE Ragalna (CT)

A magnitude ML 2.4 earthquake occured in region: 4 km NE Ragalna (CT), on

  • 30-04-2018 20:07:39 (UTC)
  • 30-04-2018 22:07:39 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.6520, 14.9700 at 6 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.

Hai sentito il terremoto? Clicca qui

Did you feel it? Fill in the questionnaire.

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 4 3924 3924
Nicolosi CT 7 7463 11387
Belpasso CT 7 28108 39495
Santa Maria di Licodia CT 8 7641 47136
Biancavilla CT 9 24007 71143
Pedara CT 9 14102 85245
Camporotondo Etneo CT 10 5023 90268
San Pietro Clarenza CT 10 7743 98011
Paternò CT 10 48228 146239
Trecastagni CT 10 10910 157149
Mascalucia CT 11 31958 189107
Adrano CT 12 36122 225229
Viagrande CT 12 8563 233792
Tremestieri Etneo CT 12 20589 254381
Zafferana Etnea CT 13 9517 263898
Gravina di Catania CT 13 25838 289736
Aci Bonaccorsi CT 14 3524 293260
San Giovanni la Punta CT 14 23060 316320
Sant'Agata li Battiati CT 14 9479 325799
Aci Sant'Antonio CT 15 17984 343783
Misterbianco CT 15 49410 393193
Milo CT 15 1087 394280
Santa Venerina CT 16 8592 402872
Motta Sant'Anastasia CT 16 12116 414988
San Gregorio di Catania CT 16 11966 426954
Valverde CT 16 7840 434794
Aci Catena CT 16 29851 464645
Acireale CT 18 52622 517267
Sant'Alfio CT 19 1582 518849
Aci Castello CT 19 18723 537572
Bronte CT 19 19172 556744
Catania CT 20 314555 871299

Municipalities with at least 50000 inhabitants

An earthquake occurred to
18 Km W of Acireale (52622 inhabitants)
20 Km NW of Catania (314555 inhabitants)
72 Km NW of Siracusa (122291 inhabitants)
78 Km SW of Reggio di Calabria (183035 inhabitants)
79 Km SW of Messina (238439 inhabitants)
82 Km E of Caltanissetta (63360 inhabitants)
83 Km N of Ragusa (73313 inhabitants)
87 Km NE of Vittoria (63339 inhabitants)
90 Km N of Modica (54633 inhabitants)
91 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 2.4 2018-04-30
20:07:39		 37.6523 14.9698 6 2019-04-24
14:49:45		 Bollettino Sismico Italiano INGV 63668661
Reviewed
Rev100 		ML 2.3 2018-04-30
20:07:39		 37.6428 14.9372 6 2018-04-30
20:16:42		 Sala Sismica INGV-Roma 56299191
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2018-04-30 20:07:39 ± 0.11
Latitude 37.6523 ± 0.0054
Longitude 14.9698 ± 0.0114
Depth (km) 6 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 63668661

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 947
Semi-minor axis of confidence ellipse (meter) 535
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 281
Circular confidence region, given by single value of horizontal uncertainty (meter) 950.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 70
Number of associated phases, regardless of their use for origin computation 22
Number of defining phases 22
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.39
Epicentral distance of station closest to the epicenter (degree) 0.04137
Epicentral distance of station farthest from the epicenter (degree) 0.55218
Number of stations at which the event was observed 14
Number of stations from which data was used for origin computation 14
Magnitudes information

ML:2.4

Field Value
Value 2.4
Uncertainty 0.3
Num. used stations 13
Type of magnitude ML
Reference to an origin 63668661
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2019-02-20 10:41:11

ML:2.3

Field Value
Value 2.3
Uncertainty 0.3
Num. used stations 10
Type of magnitude ML
Reference to an origin 56299191
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2018-04-30 20:16:42
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.AGST.EHZ. 2018-04-30T20:07:56.84 0.6 undecidable manual S 153 49.4172 50 0.45 44
IV.HAGA.HHZ. 2018-04-30T20:07:55.67 0.6 undecidable manual S 158 43.9227 50 0.75 40
IV.MUCR.HHZ. 2018-04-30T20:07:55.32 0.6 undecidable manual S 349 44.1225 50 0.33 46
IV.HLNI.HHZ. 2018-04-30T20:07:52.49 0.3 undecidable manual S 194 34.743 100 0.61 64
IV.MEU.SHZ. 2018-04-30T20:07:50.79 0.3 undecidable manual P 192 61.2942 50 -0.35 66
IV.CAGR.HHE. 2018-04-30T20:07:49.45 0.6 undecidable manual P 265 41.4252 98 1.43 29
IV.AGST.EHZ. 2018-04-30T20:07:48.82 0.3 undecidable manual P 153 49.4172 50 -0.49 66
IV.MUCR.HHZ. 2018-04-30T20:07:48.03 0.3 undecidable manual P 349 44.1225 50 -0.47 67
IV.HAGA.HHZ. 2018-04-30T20:07:48.09 0.6 undecidable manual P 158 43.9227 50 -0.36 45
IV.NOV.HHZ. 2018-04-30T20:07:48.12 0.6 undecidable manual P 19 44.1225 50 -0.38 45
IV.AIO.HHE. 2018-04-30T20:07:48.08 0.3 undecidable manual P 33 42.2244 98 -0.1 72
IV.GALF.HHZ. 2018-04-30T20:07:47.33 0.3 undecidable manual P 280 36.0417 100 0.38 69
IV.EMSG.HHZ. 2018-04-30T20:07:47.28 0.6 undecidable manual S 355 18.7701 108 0.8 41
IV.EPZF.HHZ. 2018-04-30T20:07:47.50 0.3 undecidable manual S 333 21.4674 106 0.13 75
IV.HLNI.HHZ. 2018-04-30T20:07:46.15 0.3 undecidable manual P 194 34.743 100 -0.56 66
IV.EPOZ.HHZ. 2018-04-30T20:07:44.32 0.3 undecidable manual P 83 19.3695 107 0.63 66
IV.EPZF.HHZ. 2018-04-30T20:07:43.89 0.1 undecidable manual P 333 21.4674 106 -0.21 98
IV.EMSG.HHZ. 2018-04-30T20:07:43.70 0.1 negative manual P 355 18.7701 108 0.12 100
IV.ESML.HHZ. 2018-04-30T20:07:43.32 0.3 undecidable manual S 245 8.7801 124 -0.02 78
IV.ESLN.HHZ. 2018-04-30T20:07:42.29 0.3 undecidable manual S 5 4.5954 143 0.02 78
IV.ESML.HHZ. 2018-04-30T20:07:41.34 0.1 negative manual P 245 8.7801 124 -0.43 95
IV.ESLN.HHZ. 2018-04-30T20:07:40.78 0.1 undecidable manual P 5 4.5954 143 -0.37 97
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ESML.HHE. ML:2.9 0.01349995 0.256 AML other m 2018-04-30T20:07:44.77
IV.ESML.HHN. ML:2.6 0.006748304 0.2432 AML other m 2018-04-30T20:07:45.00
IV.EPOZ.HHE. ML:2.2 0.0012252992 0.5376 AML other m 2018-04-30T20:07:50.73
IV.EMSG.HHN. ML:2.8 0.0053405215 0.384 AML other m 2018-04-30T20:07:51.57
IV.EPOZ.HHN. ML:2.2 0.0012931474999999999 0.256 AML other m 2018-04-30T20:07:52.01
IV.EPZF.HHN. ML:2.5 0.0024485405 0.3584 AML other m 2018-04-30T20:07:51.70
IV.EMSG.HHE. ML:2.6 0.003784737 0.4992 AML other m 2018-04-30T20:07:53.84
IV.HLNI.HHE. ML:1.6 0.00015521315 0.1536 AML other m 2018-04-30T20:07:54.02
IV.EPZF.HHE. ML:2.4 0.002012467 0.4992 AML other m 2018-04-30T20:07:54.07
IV.HLNI.HHN. ML:1.6 0.00018655735000000002 0.3584 AML other m 2018-04-30T20:07:56.44
IV.AGST.EHN. ML:2.4 0.0007423131 0.3584 AML other m 2018-04-30T20:07:57.68
IV.MUCR.HHE. ML:2.2 0.00048440989999999997 0.4736 AML other m 2018-04-30T20:07:58.10
IV.AGST.EHE. ML:2.3 0.0005338504499999999 0.4608 AML other m 2018-04-30T20:08:00.25
IV.MEU.SHN. ML:0.0 0.0002616019 0.5504 AML other m 2018-04-30T20:08:09.70
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
Waveforms Seismic signals in miniseed + resp format Download