Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.1 on date 23-02-2018 and time 02:07:57 (Italy) in region 9 km N Ragalna (CT)

A magnitude ML 2.1 earthquake occured in region: 9 km N Ragalna (CT), on

  • 23-02-2018 01:07:57 (UTC)
  • 23-02-2018 02:07:57 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 37.7090, 14.9630 at 22 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 9 3924 3924
Biancavilla CT 11 24007 27931
Nicolosi CT 12 7463 35394
Santa Maria di Licodia CT 12 7641 43035
Zafferana Etnea CT 13 9517 52552
Adrano CT 13 36122 88674
Belpasso CT 13 28108 116782
Pedara CT 13 14102 130884
Milo CT 14 1087 131971
Trecastagni CT 14 10910 142881
Bronte CT 14 19172 162053
Paternò CT 16 48228 210281
Santa Venerina CT 16 8592 218873
Maletto CT 16 3920 222793
San Pietro Clarenza CT 16 7743 230536
Viagrande CT 16 8563 239099
Camporotondo Etneo CT 16 5023 244122
Sant'Alfio CT 17 1582 245704
Mascalucia CT 17 31958 277662
Tremestieri Etneo CT 18 20589 298251
Aci Bonaccorsi CT 18 3524 301775
Aci Sant'Antonio CT 18 17984 319759
San Giovanni la Punta CT 19 23060 342819
Gravina di Catania CT 19 25838 368657
Randazzo CT 19 10900 379557
Sant'Agata li Battiati CT 20 9479 389036
Giarre CT 20 27659 416695
Aci Catena CT 20 29851 446546

Municipalities with at least 50000 inhabitants

An earthquake occurred to
21 Km NW of Acireale (52622 inhabitants)
25 Km NW of Catania (314555 inhabitants)
75 Km SW of Reggio di Calabria (183035 inhabitants)
75 Km SW of Messina (238439 inhabitants)
78 Km NW of Siracusa (122291 inhabitants)
83 Km E of Caltanissetta (63360 inhabitants)
89 Km N of Ragusa (73313 inhabitants)
92 Km NE of Vittoria (63339 inhabitants)
95 Km NE of Gela (75827 inhabitants)
96 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 2.1 2018-02-23
01:07:57		 37.7092 14.9632 22 2019-04-24
14:49:19		 Bollettino Sismico Italiano INGV 54222541
Reviewed
Rev100 		ML 2.1 2018-02-23
01:07:57		 37.7173 14.9862 25 2018-02-23
01:19:27		 Sala Sismica INGV-Roma 54101061
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2018-02-23 01:07:57 ± 0.14
Latitude 37.7092 ± 0.0054
Longitude 14.9632 ± 0.0091
Depth (km) 22 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 54222541

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 847
Semi-minor axis of confidence ellipse (meter) 125
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 93
Circular confidence region, given by single value of horizontal uncertainty (meter) 850.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 49
Number of associated phases, regardless of their use for origin computation 38
Number of defining phases 36
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.38
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 1.37596
Number of stations at which the event was observed 23
Number of stations from which data was used for origin computation 21
Magnitudes information

ML:2.1

Field Value
Value 2.1
Uncertainty 0.2
Num. used stations 20
Type of magnitude ML
Reference to an origin 54101061
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2018-02-23 01:19:27

ML:2.1

Field Value
Value 2.1
Uncertainty 0.2
Num. used stations 20
Type of magnitude ML
Reference to an origin 54222541
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2018-02-28 15:01:55
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.PLAC.HHE. 2018-02-23T01:08:23.17 1.0 undecidable manual P 57 152.736 54 0.72 16
IV.PLLN.EHN. 2018-02-23T01:08:23.30 1.0 undecidable manual S 294 78.366 99 1.89 10
IV.HMDC.HHZ. 2018-02-23T01:08:23.40 0.3 undecidable manual S 191 84.7485 98 0.32 66
IV.RAFF.HHZ. 2018-02-23T01:08:22.00 0.6 undecidable manual S 225 75.5688 100 1.33 30
IV.PETRA.HHZ. 2018-02-23T01:08:20.33 3.0 undecidable manual Sn -0.26 0
IV.MILZ.HHN. 2018-02-23T01:08:18.70 0.3 undecidable manual S 21 66.5778 101 0.39 65
IV.HVZN.HHE. 2018-02-23T01:08:17.40 1.0 undecidable manual S 200 62.7927 102 0.08 24
IV.SOI.EHN. 2018-02-23T01:08:15.91 0.6 undecidable manual P 67 103.7184 97 0.62 38
IV.AGST.EHZ. 2018-02-23T01:08:15.90 0.6 undecidable manual S 155 55.3002 104 0.53 44
IV.HLNI.HHZ. 2018-02-23T01:08:11.40 0.3 undecidable manual S 191 40.8258 110 -0.26 70
IV.HMDC.HHZ. 2018-02-23T01:08:11.99 0.6 undecidable manual P 191 84.7485 98 -0.4 42
IV.PLLN.EHN. 2018-02-23T01:08:11.95 0.3 undecidable manual P 294 78.366 99 0.52 63
IV.AIO.HHE. 2018-02-23T01:08:11.40 0.6 undecidable manual S 39 37.4292 112 0.57 43
IV.RAFF.HHZ. 2018-02-23T01:08:10.50 0.3 undecidable manual P 225 75.5688 100 -0.5 62
IV.IVPL.HHZ. 2018-02-23T01:08:10.67 0.6 undecidable manual P 1 73.9704 100 -0.09 46
IV.GALF.HHZ. 2018-02-23T01:08:10.50 0.3 undecidable manual S 270 34.8429 114 0.32 72
IV.IVGP.HHZ. 2018-02-23T01:08:10.75 0.6 undecidable manual P 360 76.2681 100 -0.35 44
IV.MUCR.HHZ. 2018-02-23T01:08:10.90 0.3 undecidable manual S 348 37.8288 112 -0.02 75
IV.HVZN.HHE. 2018-02-23T01:08:09.12 0.6 undecidable manual P 200 62.7927 102 0.06 48
IV.MILZ.HHN. 2018-02-23T01:08:09.53 0.3 undecidable manual P 21 66.5778 101 -0.11 70
IV.AGST.EHZ. 2018-02-23T01:08:07.64 0.3 undecidable manual P 155 55.3002 104 -0.3 69
IV.EPZF.HHZ. 2018-02-23T01:08:06.10 0.3 undecidable manual S 324 15.7731 139 0.08 77
IV.CAGR.HHZ. 2018-02-23T01:08:06.52 0.3 undecidable manual P 257 41.8248 110 0.57 67
IV.MPNC.HHE. 2018-02-23T01:08:06.90 1.0 undecidable manual P 35 59.2962 103 -1.64 13
IV.EPOZ.HHZ. 2018-02-23T01:08:06.90 1.0 undecidable manual S 102 20.1687 131 0.04 25
IV.ESML.HHZ. 2018-02-23T01:08:06.50 0.3 undecidable manual S 216 12.4764 146 1.01 58
IV.HLNI.HHZ. 2018-02-23T01:08:05.24 0.3 undecidable manual P 191 40.8258 110 -0.56 65
IV.EMSG.HHZ. 2018-02-23T01:08:05.70 0.1 undecidable manual S 355 12.4764 146 0.22 100
IV.AIO.HHE. 2018-02-23T01:08:05.34 0.3 undecidable manual P 39 37.4292 112 0.02 75
IV.MUCR.HHZ. 2018-02-23T01:08:04.59 0.3 undecidable manual P 348 37.8288 112 -0.78 61
IV.ESLN.HHZ. 2018-02-23T01:08:04.40 0.3 undecidable manual S 151 1.998 174 -0.12 79
IV.GALF.HHZ. 2018-02-23T01:08:04.44 0.1 undecidable manual P 270 34.8429 114 -0.5 89
IV.EPOZ.HHZ. 2018-02-23T01:08:03.59 0.3 undecidable manual P 102 20.1687 131 0.56 68
IV.MTTG.HHZ. 2018-02-23T01:08:02.68 3.0 negative manual P 72.2721 -7.82 0
IV.EPZF.HHZ. 2018-02-23T01:08:02.11 0.3 undecidable manual P 324 15.7731 139 -0.44 72
IV.ESML.HHZ. 2018-02-23T01:08:01.79 0.1 undecidable manual P 216 12.4764 146 -0.45 95
IV.ESLN.HHZ. 2018-02-23T01:08:01.33 0.1 undecidable manual P 151 1.998 174 -0.34 100
IV.EMSG.HHZ. 2018-02-23T01:08:01.96 0.1 positive manual P 355 12.4764 146 -0.27 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ESLN.HHN. ML:2.0 0.0007955 0.66 AML other m 2018-02-23T01:08:05.17
IV.ESLN.HHE. ML:2.2 0.001335 0.52 AML other m 2018-02-23T01:08:05.88
IV.EMSG.HHE. ML:2.5 0.00229 0.24 AML other m 2018-02-23T01:08:05.93
IV.EMSG.HHN. ML:2.4 0.001625 0.8 AML other m 2018-02-23T01:08:06.96
IV.ESML.HHN. ML:1.9 0.000512 1.3 AML other m 2018-02-23T01:08:06.15
IV.ESML.HHE. ML:2.2 0.0009245 1.42 AML other m 2018-02-23T01:08:06.89
IV.EPZF.HHN. ML:2.2 0.0010215 0.22 AML other m 2018-02-23T01:08:07.15
IV.EPZF.HHE. ML:2.2 0.00108 0.28 AML other m 2018-02-23T01:08:07.21
IV.EPOZ.HHN. ML:2.2 0.0007575 0.48 AML other m 2018-02-23T01:08:09.65
IV.EPOZ.HHE. ML:2.2 0.0009085 0.66 AML other m 2018-02-23T01:08:10.23
IV.MUCR.HHN. ML:1.8 0.000212 0.36 AML other m 2018-02-23T01:08:11.74
IV.MUCR.HHE. ML:1.8 0.00020800000000000001 1.52 AML other m 2018-02-23T01:08:11.06
IV.GALF.HHE. ML:2.0 0.00031899999999999995 1.58 AML other m 2018-02-23T01:08:11.06
IV.GALF.HHN. ML:1.9 0.0002755 0.56 AML other m 2018-02-23T01:08:11.92
IV.HLNI.HHN. ML:1.9 0.0002395 0.48 AML other m 2018-02-23T01:08:12.68
IV.HLNI.HHE. ML:1.9 0.0002245 0.42 AML other m 2018-02-23T01:08:12.61
IV.AGST.EHN. ML:2.2 0.0003179999999999999 0.42 AML other m 2018-02-23T01:08:16.20
IV.CAGR.HHN. ML:2.0 0.0003055 0.6 AML other m 2018-02-23T01:08:17.86
IV.CAGR.HHE. ML:2.0 0.000319 1.54 AML other m 2018-02-23T01:08:18.16
IV.AGST.EHE. ML:2.0 0.00021 0.52 AML other m 2018-02-23T01:08:18.44
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