Earthquake with magnitude of ML 1.4 on date 12-10-2021 and time 09:31:48 (Italy) in region 3 km NW Zafferana Etnea (CT)

A magnitude ML 1.4 earthquake occured in region: 3 km NW Zafferana Etnea (CT), on

  • 12-10-2021 07:31:48 (UTC)
  • 12-10-2021 09:31:48 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.715, 15.08 at 4 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
Zafferana Etnea CT 3 9517 9517
Milo CT 3 1087 10604
Santa Venerina CT 6 8592 19196
Sant'Alfio CT 7 1582 20778
Giarre CT 9 27659 48437
Trecastagni CT 11 10910 59347
Pedara CT 11 14102 73449
Riposto CT 11 14838 88287
Mascali CT 11 14282 102569
Viagrande CT 12 8563 111132
Nicolosi CT 12 7463 118595
Aci Sant'Antonio CT 13 17984 136579
Aci Bonaccorsi CT 13 3524 140103
Aci Catena CT 14 29851 169954
Piedimonte Etneo CT 14 3963 173917
Acireale CT 14 52622 226539
Fiumefreddo di Sicilia CT 14 9623 236162
Linguaglossa CT 15 5403 241565
San Giovanni la Punta CT 15 23060 264625
Tremestieri Etneo CT 15 20589 285214
Valverde CT 16 7840 293054
Ragalna CT 16 3924 296978
Mascalucia CT 16 31958 328936
Belpasso CT 16 28108 357044
San Pietro Clarenza CT 17 7743 364787
San Gregorio di Catania CT 17 11966 376753
Gravina di Catania CT 17 25838 402591
Sant'Agata li Battiati CT 17 9479 412070
Camporotondo Etneo CT 18 5023 417093
Calatabiano CT 18 5308 422401
Aci Castello CT 19 18723 441124
Castiglione di Sicilia CT 19 3215 444339

Municipalities with at least 50000 inhabitants

An earthquake occurred to
14 Km NW of Acireale (52622 inhabitants)
24 Km N of Catania (314555 inhabitants)
66 Km SW of Reggio di Calabria (183035 inhabitants)
68 Km SW of Messina (238439 inhabitants)
75 Km N of Siracusa (122291 inhabitants)
93 Km E of Caltanissetta (63360 inhabitants)
93 Km NE of Ragusa (73313 inhabitants)
98 Km NE of Vittoria (63339 inhabitants)
99 Km N of Modica (54633 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 earthquake resentment in the area, expressed in terms of intensity on the MCS scale (Mercalli-Cancani-Sieberg). Intensities are determined using data from questionnaires collected on the website The intensities shown are determined considering all the reports received from each municipality, and are all the more reliable the greater the number of questionnaires. The collected data are subjected to an automatic statistical filter, but are not checked individually. In particular, intensities greater than or equal to the VI degree of the MCS or EMS scale require on-site verification by specialized personnel. The black star is the epicenter of the earthquake that occurred. This map is updated every time citizens fill out new questionnaires. The number of questionnaires processed to obtain this map, the date and time of the last update are shown at the top right.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
ML 1.4 2021-10-12
37.715 15.08 4 2021-10-12
Sala Operativa INGV_OE (Catania) 96465581
Preferred location and magnitude until now.
Origin information


Field Value
Time (UTC) 2021-10-12 07:31:48
Latitude 37.7150
Longitude 15.0800
Depth (km) 4 (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 96465581


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) 300
Confidence level of the uncertainty (%) 68


Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 85
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) 0.2
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 96465581
Agency INGV
Autore Sala Operativa INGV_OE (Catania)
Time of creation (UTC) 2021-10-12 07:39:34
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