Earthquake with magnitude of ML 1.8 on date 07-10-2021 and time 11:48:02 (Italy) in region 4 km SE Randazzo (CT)

A magnitude ML 1.8 earthquake occured in region: 4 km SE Randazzo (CT), on

  • 07-10-2021 09:48:02 (UTC)
  • 07-10-2021 11:48:02 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.859, 14.981 at 27 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
Randazzo CT 4 10900 10900
Santa Domenica Vittoria ME 7 980 11880
Moio Alcantara ME 8 717 12597
Roccella Valdemone ME 9 666 13263
Malvagna ME 9 733 13996
Maletto CT 11 3920 17916
Castiglione di Sicilia CT 13 3215 21131
Francavilla di Sicilia ME 15 3945 25076
Linguaglossa CT 15 5403 30479
Bronte CT 15 19172 49651
Maniace CT 15 3765 53416
Floresta ME 16 485 53901
Motta Camastra ME 17 845 54746
Piedimonte Etneo CT 18 3963 58709
Montalbano Elicona ME 19 2287 60996
Milo CT 19 1087 62083
Sant'Alfio CT 19 1582 63665

Municipalities with at least 50000 inhabitants

An earthquake occurred to
32 Km NW of Acireale (52622 inhabitants)
41 Km N of Catania (314555 inhabitants)
63 Km SW of Messina (238439 inhabitants)
65 Km W of Reggio di Calabria (183035 inhabitants)
91 Km E of Caltanissetta (63360 inhabitants)
93 Km N of Siracusa (122291 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 1.8 2021-10-07
37.859 14.981 27 2021-10-07
Sala Operativa INGV_OE (Catania) 96314291
Preferred location and magnitude until now.
Origin information


Field Value
Time (UTC) 2021-10-07 09:48:02
Latitude 37.8590
Longitude 14.9810
Depth (km) 27 (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 96314291


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) 600
Confidence level of the uncertainty (%) 68


Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 93
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) 0.14
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 1.8
Uncertainty 0.3
Num. used stations
Type of magnitude ML
Reference to an origin 96314291
Agency INGV
Autore Sala Operativa INGV_OE (Catania)
Time of creation (UTC) 2021-10-07 09:58:45
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