Earthquake with magnitude of ML 1.6 on date 09-07-2021 and time 11:57:46 (Italy) in region 4 km SW Randazzo (CT)

A magnitude ML 1.6 earthquake occured in region: 4 km SW Randazzo (CT), on

  • 09-07-2021 09:57:46 (UTC)
  • 09-07-2021 11:57:46 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.849, 14.928 at 28 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
Maletto CT 6 3920 14820
Santa Domenica Vittoria ME 8 980 15800
Maniace CT 11 3765 19565
Bronte CT 11 19172 38737
Roccella Valdemone ME 12 666 39403
Moio Alcantara ME 12 717 40120
Malvagna ME 14 733 40853
Floresta ME 16 485 41338
Castiglione di Sicilia CT 18 3215 44553
CesarĂ² ME 19 2439 46992
Linguaglossa CT 19 5403 52395
Francavilla di Sicilia ME 19 3945 56340

Municipalities with at least 50000 inhabitants

An earthquake occurred to
34 Km NW of Acireale (52622 inhabitants)
41 Km NW of Catania (314555 inhabitants)
67 Km SW of Messina (238439 inhabitants)
69 Km W of Reggio di Calabria (183035 inhabitants)
86 Km E of Caltanissetta (63360 inhabitants)
93 Km NW 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 1.6 2021-07-09
37.849 14.928 27 2021-07-09
Sala Operativa INGV_OE (Catania) 92486591
Preferred location and magnitude until now.
Origin information


Field Value
Time (UTC) 2021-07-09 09:57:46
Latitude 37.8490
Longitude 14.9280
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 92486591


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) 1000
Confidence level of the uncertainty (%) 68


Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 104
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) 0.04
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 1.6
Uncertainty 0.2
Num. used stations
Type of magnitude ML
Reference to an origin 92486591
Agency INGV
Autore Sala Operativa INGV_OE (Catania)
Time of creation (UTC) 2021-07-09 10:03:07
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