Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.5 on date 23-12-2015 and time 13:23:13 (Italy) in region 8 km SE Bronte (CT)

A magnitude ML 1.5 earthquake occured in region: 8 km SE Bronte (CT), on

  • 23-12-2015 12:23:13 (UTC)
  • 23-12-2015 13:23:13 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 37.7450, 14.9040 at 29 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
Bronte CT 8 19172 19172
Maletto CT 10 3920 23092
Adrano CT 11 36122 59214
Biancavilla CT 12 24007 83221
Ragalna CT 13 3924 87145
Santa Maria di Licodia CT 14 7641 94786
Randazzo CT 15 10900 105686
Maniace CT 16 3765 109451
Nicolosi CT 18 7463 116914
Belpasso CT 18 28108 145022
Zafferana Etnea CT 18 9517 154539
Paternò CT 19 48228 202767
Milo CT 19 1087 203854
Pedara CT 20 14102 217956
Santa Domenica Vittoria ME 20 980 218936
Centuripe EN 20 5470 224406

Municipalities with at least 50000 inhabitants

An earthquake occurred to
27 Km NW of Acireale (52622 inhabitants)
31 Km NW of Catania (314555 inhabitants)
76 Km SW of Messina (238439 inhabitants)
77 Km SW of Reggio di Calabria (183035 inhabitants)
79 Km E of Caltanissetta (63360 inhabitants)
84 Km NW of Siracusa (122291 inhabitants)
92 Km N of Ragusa (73313 inhabitants)
94 Km NE of Vittoria (63339 inhabitants)
95 Km NE of Gela (75827 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 1.5 2015-12-23
12:23:13		 37.7452 14.9045 29 2016-02-19
13:23:08		 Bollettino Sismico Italiano INGV 23035181
Reviewed
Rev100 		ML 1.5 2015-12-23
12:23:14		 37.7488 14.9228 25 2015-12-23
12:30:27		 Sala Sismica INGV-Roma 22796231
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2015-12-23 12:23:13 ± 0.19
Latitude 37.7452 ± 0.0054
Longitude 14.9045 ± 0.0125
Depth (km) 29 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 23035181

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 999
Semi-minor axis of confidence ellipse (meter) 456
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 271
Circular confidence region, given by single value of horizontal uncertainty (meter) 1000.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 134
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) 0.33
Epicentral distance of station closest to the epicenter (degree) 0.07554
Epicentral distance of station farthest from the epicenter (degree) 0.80399
Number of stations at which the event was observed 12
Number of stations from which data was used for origin computation 12
Magnitudes information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.3
Num. used stations 7
Type of magnitude ML
Reference to an origin 23035181
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2016-01-11 11:45:13

ML:1.5

Field Value
Value 1.5
Uncertainty 0.3
Num. used stations 7
Type of magnitude ML
Reference to an origin 22796231
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2015-12-23 12:30:27
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.HAVL.HHZ. 2015-12-23T12:23:41.13 0.1 undecidable manual S 168 89.244 103 0.35 82
IV.SSY.HHZ. 2015-12-23T12:23:35.48 0.3 undecidable manual S 167 66.8775 108 0.47 63
IV.MCSR.HHZ. 2015-12-23T12:23:30.30 0.1 undecidable manual S 39 45.5211 117 0.57 86
IV.HLNI.HHZ. 2015-12-23T12:23:29.22 0.1 undecidable manual S 184 44.1225 118 -0.18 93
IV.HAVL.HHZ. 2015-12-23T12:23:28.96 0.3 undecidable manual P 168 89.244 103 -0.48 60
IV.AIO.HHZ. 2015-12-23T12:23:28.35 0.1 undecidable manual S 49 38.1285 122 0.32 92
IV.NOV.HHZ. 2015-12-23T12:23:27.18 0.1 undecidable manual S 33 37.3293 123 -0.67 80
IV.MUCR.HHZ. 2015-12-23T12:23:27.45 0.1 undecidable manual S 355 33.1446 126 0.53 87
IV.SSY.HHZ. 2015-12-23T12:23:26.20 0.6 undecidable manual P 167 66.8775 108 0.08 45
IV.MNO.SHZ. 2015-12-23T12:23:25.82 0.1 undecidable manual S 318 27.6501 132 0.05 97
IV.MCSR.HHZ. 2015-12-23T12:23:23.01 0.1 undecidable manual P 39 45.5211 117 -0.05 94
IV.EMSG.HHZ. 2015-12-23T12:23:22.89 0.1 undecidable manual S 25 9.2796 160 -0.09 100
IV.HLNI.HHZ. 2015-12-23T12:23:22.93 0.1 undecidable manual P 184 44.1225 118 0.06 95
IV.MSFR.HHZ. 2015-12-23T12:23:22.88 0.3 undecidable manual P 320 42.1245 119 0.27 68
IV.NOV.HHZ. 2015-12-23T12:23:22.08 0.1 undecidable manual P 33 37.3293 123 0.1 96
IV.EPZF.HHZ. 2015-12-23T12:23:22.88 0.1 undecidable manual S 335 9.6792 160 -0.14 100
IV.AIO.HHZ. 2015-12-23T12:23:22.37 0.1 undecidable manual P 49 38.1285 122 0.29 92
IV.MUCR.HHZ. 2015-12-23T12:23:21.29 0.1 undecidable manual P 355 33.1446 126 -0.15 95
IV.MNO.SHZ. 2015-12-23T12:23:20.80 0.1 undecidable manual P 318 27.6501 132 0.03 98
IV.EPZF.HHZ. 2015-12-23T12:23:18.73 0.1 undecidable manual P 335 9.6792 160 -0.46 93
IV.EMSG.HHZ. 2015-12-23T12:23:18.74 0.1 undecidable manual P 25 9.2796 160 -0.43 93
IV.ESLN.HHZ. 2015-12-23T12:23:18.83 0.1 undecidable manual P 133 8.3805 162 -0.29 96
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.AIO.HHE. ML:1.3 0.000060049999999999996 1.24 AML other m 2015-12-23T12:23:29.23
IV.AIO.HHN. ML:1.3 0.000058450000000000005 1.1 AML other m 2015-12-23T12:23:30.00
IV.EMSG.HHN. ML:1.8 0.000316 0.24 AML other m 2015-12-23T12:23:23.06
IV.EMSG.HHE. ML:1.8 0.00028599999999999996 0.24 AML other m 2015-12-23T12:23:24.37
IV.ESLN.HHE. ML:1.6 0.0002165 0.54 AML other m 2015-12-23T12:24:22.99
IV.ESLN.HHN. ML:1.7 0.0002415 0.8 AML other m 2015-12-23T12:24:29.50
IV.HLNI.HHE. ML:1.3 0.000047799999999999996 1.12 AML other m 2015-12-23T12:23:30.71
IV.HLNI.HHN. ML:1.3 0.00005665 0.24 AML other m 2015-12-23T12:23:30.33
IV.MNO.SHE. ML:0.0 0.00026000000000000003 0.72 AML other m 2015-12-23T12:23:26.81
IV.MNO.SHN. ML:0.0 0.00011935 0.32 AML other m 2015-12-23T12:23:27.89
IV.MUCR.HHE. ML:1.2 0.00004405 0.92 AML other m 2015-12-23T12:23:27.96
IV.MUCR.HHN. ML:1.0 0.00003195 0.52 AML other m 2015-12-23T12:23:31.49
IV.SSY.HHE. ML:1.7 0.0000817 1.18 AML other m 2015-12-23T12:23:36.20
IV.SSY.HHN. ML:2.0 0.00015649999999999998 1.3 AML other m 2015-12-23T12:23:40.22
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