Earthquake with magnitude of ML 1.4 on date 15-08-2021 and time 02:20:25 (Italy) in region 7 km NE Regalbuto (EN)

A magnitude ML 1.4 earthquake occured in region: 7 km NE Regalbuto (EN), on

  • 15-08-2021 00:20:25 (UTC)
  • 15-08-2021 02:20:25 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.695, 14.701 at 10 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
Regalbuto EN 7 7277 7277
Centuripe EN 9 5470 12747
Adrano CT 12 36122 48869
Troina EN 13 9373 58242
Catenanuova EN 14 4866 63108
Gagliano Castelferrato EN 15 3593 66701
Bronte CT 16 19172 85873
Biancavilla CT 16 24007 109880
Agira EN 16 8345 118225
CesarĂ² ME 17 2439 120664
San Teodoro ME 17 1403 122067
Santa Maria di Licodia CT 19 7641 129708

Municipalities with at least 50000 inhabitants

An earthquake occurred to
40 Km NW of Catania (314555 inhabitants)
42 Km W of Acireale (52622 inhabitants)
61 Km E of Caltanissetta (63360 inhabitants)
80 Km NE of Gela (75827 inhabitants)
84 Km N of Vittoria (63339 inhabitants)
86 Km N of Ragusa (73313 inhabitants)
88 Km NW of Siracusa (122291 inhabitants)
93 Km N of Modica (54633 inhabitants)
93 Km SW of Messina (238439 inhabitants)
95 Km SW of Reggio di Calabria (183035 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 2021-08-15
37.695 14.701 10 2021-09-27
Sala Operativa INGV_OE (Catania) 94172691
Preferred location and magnitude until now.
Origin information


Field Value
Time (UTC) 2021-08-15 00:20:25
Latitude 37.6950
Longitude 14.7010
Depth (km) 10 (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 94172691


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) 1900
Confidence level of the uncertainty (%) 68


Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 231
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) 0.34
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 0.2
Num. used stations
Type of magnitude ML
Reference to an origin 94172691
Agency INGV
Autore Sala Operativa INGV_OE (Catania)
Time of creation (UTC) 2021-08-15 00:35:49
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