Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.3 on date 01-09-2021 and time 18:09:35 (Italy) in region 6 km W Bronte (CT)

A magnitude ML 1.3 earthquake occured in region: 6 km W Bronte (CT), on

  • 01-09-2021 16:09:35 (UTC)
  • 01-09-2021 18:09:35 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.7840, 14.7670 at 35 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 6 19172 19172
Cesarò ME 8 2439 21611
San Teodoro ME 9 1403 23014
Maniace CT 10 3765 26779
Maletto CT 10 3920 30699
Adrano CT 15 36122 66821
Troina EN 15 9373 76194
Biancavilla CT 18 24007 100201
Regalbuto EN 18 7277 107478
Centuripe EN 18 5470 112948
Randazzo CT 19 10900 123848

Municipalities with at least 50000 inhabitants

An earthquake occurred to
40 Km NW of Acireale (52622 inhabitants)
42 Km NW of Catania (314555 inhabitants)
70 Km E of Caltanissetta (63360 inhabitants)
83 Km SW of Messina (238439 inhabitants)
85 Km W of Reggio di Calabria (183035 inhabitants)
92 Km NE of Gela (75827 inhabitants)
93 Km NW of Siracusa (122291 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 1.3 2021-09-01
16:09:35		 37.7837 14.767 35 2022-03-30
13:04:41		 Bollettino Sismico Italiano INGV 102053271
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-01 16:09:35 ± 0.35
Latitude 37.7837 ± 0.0117
Longitude 14.7670 ± 0.0228
Depth (km) 35 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 102053271

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1706
Semi-minor axis of confidence ellipse (meter) 1340
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 90
Circular confidence region, given by single value of horizontal uncertainty (meter) 1710.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 111
Number of associated phases, regardless of their use for origin computation 13
Number of defining phases 13
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.27
Epicentral distance of station closest to the epicenter (degree) 0.05306
Epicentral distance of station farthest from the epicenter (degree) 0.33725
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 7
Magnitude information

ML:1.3

Field Value
Value 1.3
Uncertainty 0.3
Num. used stations 7
Type of magnitude ML
Reference to an origin 102053271
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-03-17 01:19:34
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MCPD.HHZ. 2021-09-01T16:09:50.19 0.6 undecidable manual S 355 37.4292 129 0.23 47
IV.MSFR.HHZ. 2021-09-01T16:09:49.15 0.6 undecidable manual S 331 31.746 134 0.33 47
IV.MUCR.HHZ. 2021-09-01T16:09:48.07 0.6 undecidable manual S 18 30.2475 135 -0.47 45
IV.ESVO.HHE. 2021-09-01T16:09:46.84 0.6 undecidable manual S 94 15.7731 153 0.56 45
IV.ESCV.HHN. 2021-09-01T16:09:45.04 0.6 undecidable manual S 134 5.8941 170 -0.39 48
IV.EPZF.HHZ. 2021-09-01T16:09:45.68 0.6 undecidable manual S 60 9.0798 164 0.05 52
IV.MSFR.HHZ. 2021-09-01T16:09:43.00 0.1 undecidable manual P 331 31.746 134 -0.04 99
IV.MCPD.HHZ. 2021-09-01T16:09:43.85 0.1 undecidable manual P 355 37.4292 129 0.15 96
IV.MUCR.HHZ. 2021-09-01T16:09:42.86 0.1 undecidable manual P 18 30.2475 135 -0.02 100
IV.GALF.HHZ. 2021-09-01T16:09:41.63 0.3 undecidable manual P 245 19.3695 148 -0.21 73
IV.ESVO.HHE. 2021-09-01T16:09:41.56 0.3 undecidable manual P 94 15.7731 153 -0.02 77
IV.ESCV.HHN. 2021-09-01T16:09:41.44 0.3 undecidable manual P 134 5.8941 170 0.35 72
IV.EPZF.HHZ. 2021-09-01T16:09:40.75 0.3 undecidable manual P 60 9.0798 164 -0.45 71
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.GALF.HHN. ML:1.7 0.0001841033 0.256 AML other m 2021-09-01T16:09:47.56
IV.GALF.HHE. ML:1.6 0.00014107904999999997 0.3712 AML other m 2021-09-01T16:09:48.03
IV.MUCR.HHE. ML:1.4 0.00007871194 0.384 AML other m 2021-09-01T16:09:48.92
IV.MUCR.HHN. ML:1.3 0.000066718055 0.2944 AML other m 2021-09-01T16:09:50.12
IV.MSFR.HHN. ML:0.7 0.000013257667099999998 0.3328 AML other m 2021-09-01T16:09:49.31
IV.MCPD.HHN. ML:1.0 0.000025179180000000003 0.3968 AML other m 2021-09-01T16:09:51.33
IV.MCPD.HHE. ML:1.0 0.000025511445 0.2944 AML other m 2021-09-01T16:09:50.84
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