Earthquake with magnitude of ML 1.4 on date 01-09-2021 and time 16:08:28 (UTC) in region 7 km W Bronte (CT)

A magnitude ML 1.4 earthquake occured in region: 7 km W Bronte (CT), on

  • 01-09-2021 16:08:28 (UTC)
  • 01-09-2021 18:08:28 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.769, 14.754 at 30 km depth.

The earthquake was located by: Sala Operativa INGV_OE (Catania).

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.

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 7 19172 19172
CesarĂ² ME 9 2439 21611
San Teodoro ME 10 1403 23014
Maniace CT 12 3765 26779
Maletto CT 12 3920 30699
Troina EN 14 9373 40072
Adrano CT 14 36122 76194
Regalbuto EN 16 7277 83471
Centuripe EN 16 5470 88941
Biancavilla CT 17 24007 112948

Municipalities with at least 50000 inhabitants

An earthquake occurred to
40 Km W of Acireale (52622 inhabitants)
42 Km NW of Catania (314555 inhabitants)
68 Km E of Caltanissetta (63360 inhabitants)
85 Km SW of Messina (238439 inhabitants)
87 Km W of Reggio di Calabria (183035 inhabitants)
90 Km NE of Gela (75827 inhabitants)
92 Km NW of Siracusa (122291 inhabitants)
93 Km N of Vittoria (63339 inhabitants)
94 Km N of Ragusa (73313 inhabitants)
Recent and historical seismicity
Seismic hazard
Felt maps
Preliminary map of the earthquake effects from the web questionnaire

Preliminary map of the earthquake effects from the web questionnaire

This map shows the distribution of the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire ( that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
ML 1.4 2021-09-01
37.769 14.754 30 2021-09-01
Sala Operativa INGV_OE (Catania) 94924311
Preferred location and magnitude until now.
Origin information


Field Value
Time (UTC) 2021-09-01 16:08:28
Latitude 37.7690
Longitude 14.7540
Depth (km) 30 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 200 -> SURVEY-INGV-CT#SeismPicker_SO-OE
Event type earthquake
Origin ID 94924311


Field Value
Preferred uncertainty description horizontal uncertainty
Semi-major axis of confidence ellipse (meter)
Semi-minor axis of confidence ellipse (meter)
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi)
Circular confidence region, given by single value of horizontal uncertainty (meter) 2000
Confidence level of the uncertainty (%) 68


Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 211
Number of associated phases, regardless of their use for origin computation 1
Number of defining phases 1
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.12
Epicentral distance of station closest to the epicenter (degree)
Epicentral distance of station farthest from the epicenter (degree)
Number of stations at which the event was observed 0
Number of stations from which data was used for origin computation 0
Magnitude information


Field Value
Value 1.4
Uncertainty 0.3
Num. used stations
Type of magnitude ML
Reference to an origin 94924311
Agency INGV
Autore Sala Operativa INGV_OE (Catania)
Time of creation (UTC) 2021-09-01 16:19:44
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download