Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.1 on date 20-11-2018 and time 08:21:24 (Italy) in region 9 km NE Biancavilla (CT)

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

  • 20-11-2018 07:21:24 (UTC)
  • 20-11-2018 08:21:24 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 37.7160, 14.9140 at 27 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
Biancavilla CT 9 24007 24007
Adrano CT 9 36122 60129
Ragalna CT 10 3924 64053
Bronte CT 11 19172 83225
Santa Maria di Licodia CT 11 7641 90866
Maletto CT 13 3920 94786
Belpasso CT 15 28108 122894
Nicolosi CT 15 7463 130357
Paternò CT 15 48228 178585
Zafferana Etnea CT 17 9517 188102
Pedara CT 17 14102 202204
Milo CT 18 1087 203291
Trecastagni CT 18 10910 214201
Randazzo CT 18 10900 225101
Camporotondo Etneo CT 18 5023 230124
Centuripe EN 19 5470 235594
San Pietro Clarenza CT 19 7743 243337
Maniace CT 19 3765 247102
Viagrande CT 20 8563 255665
Mascalucia CT 20 31958 287623

Municipalities with at least 50000 inhabitants

An earthquake occurred to
25 Km W of Acireale (52622 inhabitants)
28 Km NW of Catania (314555 inhabitants)
78 Km SW of Messina (238439 inhabitants)
78 Km SW of Reggio di Calabria (183035 inhabitants)
79 Km E of Caltanissetta (63360 inhabitants)
80 Km NW of Siracusa (122291 inhabitants)
89 Km N of Ragusa (73313 inhabitants)
92 Km NE of Vittoria (63339 inhabitants)
93 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 2018-11-20
07:21:24		 37.7163 14.9143 27 2019-06-04
09:16:17		 Bollettino Sismico Italiano INGV 68535801
Reviewed
Rev100 		ML 2.1 2018-11-20
07:21:25		 37.7232 14.9038 25 2018-11-20
07:42:01		 Sala Sismica INGV-Roma 63229011
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2018-11-20 07:21:24 ± 0.28
Latitude 37.7163 ± 0.0081
Longitude 14.9143 ± 0.0148
Depth (km) 27 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 68535801

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1163
Semi-minor axis of confidence ellipse (meter) 677
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 95
Circular confidence region, given by single value of horizontal uncertainty (meter) 1160.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 73
Number of associated phases, regardless of their use for origin computation 18
Number of defining phases 17
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.32
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.57197
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 10
Magnitudes information

ML:2.1

Field Value
Value 2.1
Uncertainty 0.3
Num. used stations 10
Type of magnitude ML
Reference to an origin 63229011
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2018-11-20 07:42:01

ML:2.1

Field Value
Value 2.1
Uncertainty 0.3
Num. used stations 10
Type of magnitude ML
Reference to an origin 68535801
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2019-05-14 09:17:23
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CLTA.HHZ. 2018-11-20T07:21:53.24 3.0 undecidable manual S -0.48 0
IV.SSY.HHZ. 2018-11-20T07:21:45.65 0.6 undecidable manual S 167 63.492 107 0.63 41
IV.HLNI.HHZ. 2018-11-20T07:21:39.45 0.6 undecidable manual S 185 40.9257 117 0.04 51
IV.AIO.HHZ. 2018-11-20T07:21:39.91 0.6 undecidable manual S 45 39.7269 118 0.79 42
IV.MUCR.HHE. 2018-11-20T07:21:38.51 0.6 undecidable manual S 354 36.4413 120 0.17 50
IV.GALF.HHZ. 2018-11-20T07:21:37.84 0.6 undecidable manual S 269 30.5472 126 0.82 42
IV.SSY.HHZ. 2018-11-20T07:21:36.53 0.3 undecidable manual P 167 63.492 107 -0.03 74
IV.EPZF.HHZ. 2018-11-20T07:21:34.22 0.6 undecidable manual S 337 12.9759 151 0.38 50
IV.HLNI.HHZ. 2018-11-20T07:21:33.16 0.1 undecidable manual P 185 40.9257 117 -0.16 100
IV.AIO.HHZ. 2018-11-20T07:21:33.36 0.3 undecidable manual P 45 39.7269 118 0.21 74
IV.MUCR.HHE. 2018-11-20T07:21:32.56 0.1 undecidable manual P 354 36.4413 120 -0.14 100
IV.ESLN.HHZ. 2018-11-20T07:21:32.78 0.6 undecidable manual S 116 5.8941 166 -0.37 50
IV.GALF.HHZ. 2018-11-20T07:21:31.66 0.3 undecidable manual P 269 30.5472 126 -0.28 74
IV.EPOZ.HHZ. 2018-11-20T07:21:31.28 1.0 undecidable manual P 101 24.5532 132 0.06 26
IV.ESML.HHZ. 2018-11-20T07:21:30.25 0.3 undecidable manual P 196 11.2776 154 0.26 77
IV.ESLN.HHZ. 2018-11-20T07:21:29.31 0.3 undecidable manual P 116 5.8941 166 -0.39 75
IV.EPZF.HHZ. 2018-11-20T07:21:29.59 0.3 undecidable manual P 337 12.9759 151 -0.51 72
IV.EMCN.HNZ. 2018-11-20T07:21:29.64 0.6 undecidable manual P 51 13.3755 150 -0.49 48
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.EPZF.HHE. ML:2.6 0.002225 0.62 AML other m 2018-11-20T07:21:34.93
IV.EPZF.HHN. ML:2.3 0.0009550000000000001 1.06 AML other m 2018-11-20T07:21:34.24
IV.GALF.HHN. ML:1.8 0.000245 0.26 AML other m 2018-11-20T07:21:39.17
IV.GALF.HHE. ML:2.0 0.0003235 0.44 AML other m 2018-11-20T07:21:39.77
IV.HLNI.HHN. ML:1.9 0.00023299999999999997 0.38 AML other m 2018-11-20T07:21:40.30
IV.AIO.HHE. ML:2.2 0.00042300000000000004 0.36 AML other m 2018-11-20T07:21:40.17
IV.HLNI.HHE. ML:1.9 0.000234 0.72 AML other m 2018-11-20T07:21:40.63
IV.AIO.HHN. ML:1.8 0.00020150000000000002 0.52 AML other m 2018-11-20T07:21:41.23
IV.SSY.HHE. ML:2.6 0.0006540000000000001 1.4 AML other m 2018-11-20T07:21:45.08
IV.SSY.HHN. ML:2.8 0.001105 0.8 AML other m 2018-11-20T07:21:49.24
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