Earthquake with magnitude of ML 1.2 on date 22-10-2021 and time 03:48:36 (UTC) in region 3 km W Zafferana Etnea (CT)

A magnitude ML 1.2 earthquake occured in region: 3 km W Zafferana Etnea (CT), on

  • 22-10-2021 03:48:36 (UTC)
  • 22-10-2021 05:48:36 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.705, 15.078 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 4 1087 10604
Santa Venerina CT 6 8592 19196
Sant'Alfio CT 7 1582 20778
Trecastagni CT 10 10910 31688
Pedara CT 10 14102 45790
Giarre CT 10 27659 73449
Viagrande CT 11 8563 82012
Nicolosi CT 11 7463 89475
Riposto CT 12 14838 104313
Aci Sant'Antonio CT 12 17984 122297
Mascali CT 12 14282 136579
Aci Bonaccorsi CT 12 3524 140103
Aci Catena CT 13 29851 169954
Acireale CT 13 52622 222576
San Giovanni la Punta CT 14 23060 245636
Tremestieri Etneo CT 14 20589 266225
Valverde CT 15 7840 274065
Piedimonte Etneo CT 15 3963 278028
Mascalucia CT 15 31958 309986
Ragalna CT 15 3924 313910
Fiumefreddo di Sicilia CT 15 9623 323533
Belpasso CT 15 28108 351641
San Pietro Clarenza CT 15 7743 359384
San Gregorio di Catania CT 16 11966 371350
Gravina di Catania CT 16 25838 397188
Sant'Agata li Battiati CT 16 9479 406667
Linguaglossa CT 16 5403 412070
Camporotondo Etneo CT 16 5023 417093
Aci Castello CT 18 18723 435816
Calatabiano CT 19 5308 441124
Santa Maria di Licodia CT 19 7641 448765
Biancavilla CT 20 24007 472772

Municipalities with at least 50000 inhabitants

An earthquake occurred to
13 Km NW of Acireale (52622 inhabitants)
22 Km N of Catania (314555 inhabitants)
67 Km SW of Reggio di Calabria (183035 inhabitants)
69 Km SW of Messina (238439 inhabitants)
74 Km N of Siracusa (122291 inhabitants)
92 Km NE of Ragusa (73313 inhabitants)
93 Km E of Caltanissetta (63360 inhabitants)
97 Km NE of Vittoria (63339 inhabitants)
98 Km N of Modica (54633 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
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 (http://www.haisentitoilterremoto.it/) 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
Reviewed
Rev200
ML 1.2 2021-10-22
03:48:36
37.705 15.078 4 2021-10-22
03:54:00
Sala Operativa INGV_OE (Catania) 96866091
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-22 03:48:36
Latitude 37.7050
Longitude 15.0780
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 96866091

Uncertainty

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

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 100
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) 0.21
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

ML:1.2

Field Value
Value 1.2
Uncertainty 0.3
Num. used stations
Type of magnitude ML
Reference to an origin 96866091
Agency INGV
Autore Sala Operativa INGV_OE (Catania)
Time of creation (UTC) 2021-10-22 03:54:00
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download