Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.7 on date 14-07-2021 and time 02:02:10 (Italy) in region 5 km W Bronte (CT)

A magnitude ML 1.7 earthquake occured in region: 5 km W Bronte (CT), on

  • 14-07-2021 00:02:10 (UTC)
  • 14-07-2021 02:02:10 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.7800, 14.7800 at 33 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 5 19172 19172
Cesarò ME 9 2439 21611
Maletto CT 10 3920 25531
Maniace CT 10 3765 29296
San Teodoro ME 10 1403 30699
Adrano CT 14 36122 66821
Troina EN 16 9373 76194
Biancavilla CT 17 24007 100201
Centuripe EN 18 5470 105671
Randazzo CT 18 10900 116571
Regalbuto EN 19 7277 123848

Municipalities with at least 50000 inhabitants

An earthquake occurred to
39 Km NW of Acireale (52622 inhabitants)
41 Km NW of Catania (314555 inhabitants)
71 Km E of Caltanissetta (63360 inhabitants)
82 Km SW of Messina (238439 inhabitants)
84 Km W of Reggio di Calabria (183035 inhabitants)
92 Km NW of Siracusa (122291 inhabitants)
92 Km NE of Gela (75827 inhabitants)
95 Km N of Vittoria (63339 inhabitants)
95 Km N of Ragusa (73313 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 1.7 2021-07-14
00:02:10		 37.7798 14.7802 33 2021-12-29
11:12:14		 Bollettino Sismico Italiano INGV 93238831
Reviewed
Rev200 		ML 1.7 2021-07-14
00:02:10		 37.792 14.818 32 2021-07-14
00:32:53		 Sala Sismica INGV-Roma 92733591
Reviewed
Rev100 		ML 1.7 2021-07-14
00:02:10		 37.7918 14.8178 32 2021-07-14
00:18:55		 Sala Sismica INGV-Roma 92732911
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-07-14 00:02:10 ± 0.16
Latitude 37.7798 ± 0.0090
Longitude 14.7802 ± 0.0182
Depth (km) 33 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 93238831

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1666
Semi-minor axis of confidence ellipse (meter) 632
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 76
Circular confidence region, given by single value of horizontal uncertainty (meter) 1670.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 82
Number of associated phases, regardless of their use for origin computation 27
Number of defining phases 26
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.36
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.86335
Number of stations at which the event was observed 19
Number of stations from which data was used for origin computation 18
Magnitudes information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.3
Num. used stations
Type of magnitude ML
Reference to an origin 92733591
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-07-14 00:32:53

ML:1.7

Field Value
Value 1.7
Uncertainty 0.3
Num. used stations 14
Type of magnitude ML
Reference to an origin 92732911
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-07-14 00:18:55

ML:1.7

Field Value
Value 1.7
Uncertainty 0.3
Num. used stations 16
Type of magnitude ML
Reference to an origin 93238831
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-07-26 13:31:16
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.HAVL.HHZ. 2021-07-14T00:02:39.03 0.3 undecidable manual S 162 95.8263 54 0.09 66
IV.SSY.HHZ. 2021-07-14T00:02:33.44 0.3 undecidable manual S 159 73.6707 109 0.15 68
IV.HAVL.HHZ. 2021-07-14T00:02:26.64 0.1 undecidable manual P 162 95.8263 54 -0.14 87
IV.HLNI.HHZ. 2021-07-14T00:02:26.80 0.3 undecidable manual S 170 48.5181 119 -0.34 69
IV.SSY.HHZ. 2021-07-14T00:02:23.58 0.1 positive manual P 159 73.6707 109 0.05 93
IV.GALF.HHZ. 2021-07-14T00:02:22.23 0.3 undecidable manual S 248 20.2686 145 0.8 58
IV.ESML.HHZ. 2021-07-14T00:02:21.53 0.3 undecidable manual S 154 19.9689 146 0.15 75
IV.EMFO.HHZ. 2021-07-14T00:02:21.20 3.0 undecidable manual P 0
IV.EPZF.HHZ. 2021-07-14T00:02:20.06 0.3 undecidable manual S 54 8.2806 164 0 79
IV.EMSG.HHZ. 2021-07-14T00:02:20.83 0.3 undecidable manual S 73 15.5733 152 0.05 78
IV.AIO.HHE. 2021-07-14T00:02:19.70 0.6 undecidable manual P 62 45.0216 121 0.2 48
IV.HLNI.HHZ. 2021-07-14T00:02:19.73 0.1 undecidable manual P 170 48.5181 119 -0.24 94
IV.MCPD.HHE. 2021-07-14T00:02:18.57 0.1 negative manual P 354 37.9287 126 -0.03 100
IV.ESCV.HHZ. 2021-07-14T00:02:18.86 0.6 undecidable manual S 140 4.7952 171 -1 39
IV.MSFR.HHZ. 2021-07-14T00:02:18.01 0.1 undecidable manual P 330 32.6451 131 0.05 99
IV.EPIT.HHN. 2021-07-14T00:02:18.07 0.6 undecidable manual P 82 24.4533 140 1 38
IV.MUCR.HHZ. 2021-07-14T00:02:17.34 0.3 undecidable manual P 16 30.3474 133 -0.35 71
IV.EMNR.HHZ. 2021-07-14T00:02:17.94 0.6 undecidable manual P 79 21.9669 143 1.11 36
IV.ECTS.HHZ. 2021-07-14T00:02:17.85 0.3 undecidable manual P 69 31.9458 132 -0.03 75
IV.EMPL.HHZ. 2021-07-14T00:02:17.55 0.6 undecidable manual P 124 20.0688 146 0.89 40
IV.EMSG.HHZ. 2021-07-14T00:02:16.30 0.3 undecidable manual P 73 15.5733 152 0 78
IV.GALF.HHZ. 2021-07-14T00:02:16.50 0.3 undecidable manual P 248 20.2686 145 -0.18 76
IV.ECHR.HHE. 2021-07-14T00:02:16.85 0.6 undecidable manual P 132 15.5733 152 0.55 46
IV.ESML.HHZ. 2021-07-14T00:02:16.88 0.6 undecidable manual P 154 19.9689 146 0.23 49
IV.EPZF.HHZ. 2021-07-14T00:02:15.48 0.1 undecidable manual P 54 8.2806 164 -0.41 97
IV.ECZM.HHN. 2021-07-14T00:02:15.89 0.3 undecidable manual P 116 12.1767 158 -0.19 75
IV.ESCV.HHZ. 2021-07-14T00:02:15.05 0.1 positive manual P 140 4.7952 171 -0.72 88
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ESCV.HHE. ML:1.7 0.0002347288 1.78 AML other m 2021-07-14T00:02:19.89
IV.EPZF.HHE. ML:1.5 0.00015184455 0.52 AML other m 2021-07-14T00:02:21.88
IV.EPZF.HHN. ML:2.0 0.0004562299 0.4 AML other m 2021-07-14T00:02:21.17
IV.ESCV.HHN. ML:1.8 0.000323 0.24 AML other m 2021-07-14T00:02:21.32
IV.GALF.HHE. ML:1.7 0.0001835 0.36 AML other m 2021-07-14T00:02:23.19
IV.GALF.HHN. ML:1.7 0.0002065 1.5 AML other m 2021-07-14T00:02:24.86
IV.MUCR.HHE. ML:1.2 0.000045239904999999994 0.34 AML other m 2021-07-14T00:02:24.37
IV.MUCR.HHN. ML:1.1 0.00004141902999999999 0.56 AML other m 2021-07-14T00:02:24.67
IV.HLNI.HHE. ML:1.4 0.00005871544 0.14 AML other m 2021-07-14T00:02:27.67
IV.HLNI.HHN. ML:1.5 0.00007210350999999999 0.22 AML other m 2021-07-14T00:02:27.51
IV.SSY.HHE. ML:2.2 0.00021393294999999998 1.76 AML other m 2021-07-14T00:02:34.01
IV.SSY.HHN. ML:2.5 0.00047295239999999993 0.22 AML other m 2021-07-14T00:02:35.57
IV.HAVL.HHE. ML:1.7 0.000047223534999999995 0.3 AML other m 2021-07-14T00:02:41.67
IV.EMSG.HHE. ML:1.6 0.00017995555000000003 0.42 AML other m 2021-07-14T00:02:22.18
IV.EMSG.HHN. ML:1.7 0.00021274465 0.42 AML other m 2021-07-14T00:02:24.84
IV.GALF.HNN. ML:1.4 0.00009194047 0.7 AML other m 2021-07-14T00:02:28.82
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