Earthquake with magnitude of ML 1.5 on date 24-08-2021 and time 19:05:41 (Italy) in region 3 km NW Motta Sant'Anastasia (CT)

A magnitude ML 1.5 earthquake occured in region: 3 km NW Motta Sant'Anastasia (CT), on

  • 24-08-2021 17:05:41 (UTC)
  • 24-08-2021 19:05:41 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.538, 14.951 at 7 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
Motta Sant'Anastasia CT 3 12116 12116
Misterbianco CT 5 49410 61526
Camporotondo Etneo CT 6 5023 66549
PaternĂ² CT 6 48228 114777
Belpasso CT 7 28108 142885
San Pietro Clarenza CT 8 7743 150628
Mascalucia CT 10 31958 182586
Gravina di Catania CT 10 25838 208424
Ragalna CT 10 3924 212348
Santa Maria di Licodia CT 10 7641 219989
Nicolosi CT 11 7463 227452
Tremestieri Etneo CT 12 20589 248041
Sant'Agata li Battiati CT 12 9479 257520
Catania CT 13 314555 572075
Pedara CT 13 14102 586177
San Giovanni la Punta CT 14 23060 609237
Biancavilla CT 14 24007 633244
San Gregorio di Catania CT 14 11966 645210
Trecastagni CT 14 10910 656120
Viagrande CT 15 8563 664683
Aci Bonaccorsi CT 16 3524 668207
Valverde CT 16 7840 676047
Aci Sant'Antonio CT 17 17984 694031
Aci Castello CT 17 18723 712754
Adrano CT 17 36122 748876
Aci Catena CT 18 29851 778727

Municipalities with at least 50000 inhabitants

An earthquake occurred to
13 Km W of Catania (314555 inhabitants)
21 Km W of Acireale (52622 inhabitants)
61 Km NW of Siracusa (122291 inhabitants)
71 Km N of Ragusa (73313 inhabitants)
75 Km NE of Vittoria (63339 inhabitants)
77 Km N of Modica (54633 inhabitants)
79 Km E of Caltanissetta (63360 inhabitants)
81 Km NE of Gela (75827 inhabitants)
88 Km SW of Reggio di Calabria (183035 inhabitants)
90 Km SW of Messina (238439 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 1.5 2021-08-24
37.538 14.951 7 2021-08-24
Sala Operativa INGV_OE (Catania) 94592481
Preferred location and magnitude until now.
Origin information


Field Value
Time (UTC) 2021-08-24 17:05:41
Latitude 37.5380
Longitude 14.9510
Depth (km) 7 (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 94592481


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) 900
Confidence level of the uncertainty (%) 68


Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 115
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) 0.16
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 1.5
Uncertainty 0.2
Num. used stations
Type of magnitude ML
Reference to an origin 94592481
Agency INGV
Autore Sala Operativa INGV_OE (Catania)
Time of creation (UTC) 2021-08-24 17:26:55
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