Earthquake with magnitude of ML 1.1 on date 30-11-2020 and time 23:21:53 (Italy) in region 3 km NW Ragalna (CT)

A magnitude ML 1.1 earthquake occured in region: 3 km NW Ragalna (CT), on

  • 30-11-2020 22:21:53 (UTC)
  • 30-11-2020 23:21:53 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 37.65, 14.91 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
Ragalna CT 3 3924 3924
Biancavilla CT 4 24007 27931
Santa Maria di Licodia CT 4 7641 35572
Adrano CT 7 36122 71694
PaternĂ² CT 8 48228 119922
Belpasso CT 9 28108 148030
Nicolosi CT 11 7463 155493
Camporotondo Etneo CT 13 5023 160516
San Pietro Clarenza CT 13 7743 168259
Pedara CT 14 14102 182361
Centuripe EN 15 5470 187831
Mascalucia CT 15 31958 219789
Trecastagni CT 16 10910 230699
Motta Sant'Anastasia CT 16 12116 242815
Tremestieri Etneo CT 17 20589 263404
Misterbianco CT 17 49410 312814
Gravina di Catania CT 17 25838 338652
Bronte CT 17 19172 357824
Viagrande CT 17 8563 366387
Zafferana Etnea CT 18 9517 375904
San Giovanni la Punta CT 18 23060 398964
Sant'Agata li Battiati CT 18 9479 408443
Aci Bonaccorsi CT 19 3524 411967
Aci Sant'Antonio CT 20 17984 429951
San Gregorio di Catania CT 20 11966 441917

Municipalities with at least 50000 inhabitants

An earthquake occurred to
23 Km NW of Catania (314555 inhabitants)
23 Km W of Acireale (52622 inhabitants)
74 Km NW of Siracusa (122291 inhabitants)
77 Km E of Caltanissetta (63360 inhabitants)
82 Km N of Ragusa (73313 inhabitants)
82 Km SW of Reggio di Calabria (183035 inhabitants)
83 Km SW of Messina (238439 inhabitants)
85 Km NE of Vittoria (63339 inhabitants)
87 Km NE of Gela (75827 inhabitants)
89 Km N of Modica (54633 inhabitants)
Recent and historical Seismicity
Seismic hazard
Felt maps
The earthquake effects in MCS scale as obtained from the compiled questionnaire

The earthquake effects in MCS scale as obtained from the compiled 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 1.1 2020-11-30
37.65 14.91 4 2020-11-30
Sala Operativa INGV_OE (Catania) 85118511
Preferred location and magnitude until now.
Origin information


Field Value
Time (UTC) 2020-11-30 22:21:53
Latitude 37.65
Longitude 14.91
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 85118511


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) 500
Confidence level of the uncertainty (%) 68


Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 106
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) 0.25
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 1.1
Uncertainty 0.1
Num. used stations
Type of magnitude ML
Reference to an origin 85118511
Agency INGV
Autore Sala Operativa INGV_OE (Catania)
Time of creation (UTC) 2020-11-30 23:44:25
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download