Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.5 on date 16-08-2021 and time 03:57:12 (Italy) in region 6 km S Bronte (CT)

A magnitude ML 1.5 earthquake occured in region: 6 km S Bronte (CT), on

  • 16-08-2021 01:57:12 (UTC)
  • 16-08-2021 03:57:12 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.7390, 14.8280 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.

Hai sentito il terremoto? Clicca qui

Did you feel it? Fill in the questionnaire.

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
Adrano CT 9 36122 55294
Maletto CT 11 3920 59214
Biancavilla CT 11 24007 83221
Maniace CT 14 3765 86986
Santa Maria di Licodia CT 15 7641 94627
Centuripe EN 15 5470 100097
Cesarò ME 16 2439 102536
Ragalna CT 16 3924 106460
San Teodoro ME 17 1403 107863
Randazzo CT 19 10900 118763
Regalbuto EN 19 7277 126040
Paternò CT 19 48228 174268

Municipalities with at least 50000 inhabitants

An earthquake occurred to
33 Km W of Acireale (52622 inhabitants)
35 Km NW of Catania (314555 inhabitants)
73 Km E of Caltanissetta (63360 inhabitants)
82 Km SW of Messina (238439 inhabitants)
83 Km SW of Reggio di Calabria (183035 inhabitants)
86 Km NW of Siracusa (122291 inhabitants)
91 Km NE of Gela (75827 inhabitants)
91 Km N of Ragusa (73313 inhabitants)
91 Km N of Vittoria (63339 inhabitants)
98 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 2021-08-16
01:57:12		 37.7388 14.8278 27 2021-12-29
11:12:23		 Bollettino Sismico Italiano INGV 94652621
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-08-16 01:57:12 ± 0.23
Latitude 37.7388 ± 0.0081
Longitude 14.8278 ± 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 94652621

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1270
Semi-minor axis of confidence ellipse (meter) 399
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 276
Circular confidence region, given by single value of horizontal uncertainty (meter) 1270.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 50
Number of associated phases, regardless of their use for origin computation 28
Number of defining phases 19
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.39
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.63402
Number of stations at which the event was observed 19
Number of stations from which data was used for origin computation 11
Magnitude information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.2
Num. used stations 12
Type of magnitude ML
Reference to an origin 94652621
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-08-26 07:27:45
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.EPDN.HHZ. 2021-08-16T01:58:42.08 3.0 undecidable manual S 0
IV.ECZM.HHZ. 2021-08-16T01:58:30.58 3.0 undecidable manual P 0
IV.EMCN.HHZ. 2021-08-16T01:58:28.56 3.0 undecidable manual P 0
IV.EMNR.HHZ. 2021-08-16T01:58:27.86 3.0 undecidable manual P 0
IV.ESVO.HHZ. 2021-08-16T01:58:25.56 3.0 undecidable manual P 0
IV.EMFS.HHZ. 2021-08-16T01:58:25.56 3.0 undecidable manual P 0
IV.EPDN.HHZ. 2021-08-16T01:58:25.82 3.0 undecidable manual P 0
IV.ECBD.HHZ. 2021-08-16T01:58:24.87 3.0 undecidable manual P 0
IV.HAVL.HHZ. 2021-08-16T01:57:38.73 3.0 undecidable manual P 0
IV.SSY.HHZ. 2021-08-16T01:57:33.99 0.6 undecidable manual S 161 67.9764 106 0.57 41
IV.HLNI.HHZ. 2021-08-16T01:57:27.75 0.1 undecidable manual S 175 43.4232 116 0.47 87
IV.MCPD.HHZ. 2021-08-16T01:57:27.82 0.1 undecidable manual S 349 43.1235 116 0.62 81
IV.RAFF.HHZ. 2021-08-16T01:57:25.03 0.6 undecidable manual P 216 70.374 105 0.21 43
IV.SSY.HHZ. 2021-08-16T01:57:24.20 0.1 undecidable manual P 161 67.9764 106 -0.26 86
IV.GALF.HHZ. 2021-08-16T01:57:23.05 0.3 undecidable manual S 262 23.1546 135 0.24 70
IV.EMSG.HHZ. 2021-08-16T01:57:21.29 0.1 undecidable manual S 50 14.0748 150 -0.02 100
IV.EMPL.HHZ. 2021-08-16T01:57:21.84 0.1 undecidable manual S 118 14.1747 149 0.52 91
IV.EPZF.HHZ. 2021-08-16T01:57:21.14 0.1 undecidable manual S 15 9.7791 158 0.34 94
IV.HLNI.HHZ. 2021-08-16T01:57:20.70 0.1 undecidable manual P 175 43.4232 116 -0.22 91
IV.MCPD.HHZ. 2021-08-16T01:57:20.86 0.1 undecidable manual P 349 43.1235 116 -0.01 96
IV.ESCV.HHZ. 2021-08-16T01:57:19.84 0.3 undecidable manual S 309 1.3986 177 -0.47 70
IV.GALF.HHZ. 2021-08-16T01:57:18.37 0.1 undecidable manual P 262 23.1546 135 0.04 98
IV.EPIT.HHZ. 2021-08-16T01:57:18.51 0.3 undecidable manual P 68 21.5673 137 0.34 70
IV.ESML.HHZ. 2021-08-16T01:57:17.30 0.1 undecidable manual P 161 14.1747 149 -0.17 97
IV.EMSG.HHZ. 2021-08-16T01:57:17.08 0.1 undecidable manual P 50 14.0748 150 -0.39 93
IV.EMPL.HHZ. 2021-08-16T01:57:17.46 0.1 undecidable manual P 118 14.1747 149 -0.02 100
IV.ESCV.HHZ. 2021-08-16T01:57:16.04 0.1 undecidable manual P 309 1.3986 177 -0.85 81
IV.EPZF.HHZ. 2021-08-16T01:57:16.73 0.1 undecidable manual P 15 9.7791 158 -0.45 92
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.EMSG.HHE. ML:1.7 0.00024249999999999999 0.34 AML other m 2021-08-16T01:57:21.93
IV.EPZF.HHN. ML:1.4 0.00015099999999999998 1.38 AML other m 2021-08-16T01:57:21.14
IV.ESCV.HHN. ML:1.5 0.0001875 0.22 AML other m 2021-08-16T01:57:21.94
IV.EMSG.HHN. ML:1.7 0.0002475 0.4 AML other m 2021-08-16T01:57:21.99
IV.ESCV.HHE. ML:1.4 0.0001595 0.22 AML other m 2021-08-16T01:57:22.31
IV.EPZF.HHE. ML:1.3 0.00009820000000000002 0.26 AML other m 2021-08-16T01:57:22.24
IV.EMPL.HHE. ML:1.7 0.000236 0.94 AML other m 2021-08-16T01:57:22.52
IV.GALF.HHE. ML:1.4 0.00011199999999999998 0.5 AML other m 2021-08-16T01:57:25.42
IV.GALF.HHN. ML:1.3 0.00008925 0.26 AML other m 2021-08-16T01:57:25.61
IV.EMPL.HHN. ML:2.0 0.0004555 0.2 AML other m 2021-08-16T01:57:25.89
IV.HLNI.HHE. ML:1.1 0.00002845 1.4 AML other m 2021-08-16T01:57:28.90
IV.HLNI.HHN. ML:1.1 0.00003585 0.14 AML other m 2021-08-16T01:57:28.58
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