Earthquake with magnitude of ML 1.8 on date 27-11-2020 and time 05:11:10 (Italy) in region 11 km N Ragalna (CT)

A magnitude ML 1.8 earthquake occured in region: 11 km N Ragalna (CT), on

  • 27-11-2020 04:11:10 (UTC)
  • 27-11-2020 05:11:10 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 37.73, 14.97 at 13 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 11 3924 3924
Zafferana Etnea CT 12 9517 13441
Milo CT 13 1087 14528
Biancavilla CT 13 24007 38535
Nicolosi CT 13 7463 45998
Adrano CT 14 36122 82120
Bronte CT 14 19172 101292
Santa Maria di Licodia CT 14 7641 108933
Pedara CT 14 14102 123035
Belpasso CT 15 28108 151143
Maletto CT 15 3920 155063
Trecastagni CT 15 10910 165973
Santa Venerina CT 15 8592 174565
Sant'Alfio CT 15 1582 176147
Viagrande CT 17 8563 184710
Randazzo CT 17 10900 195610
San Pietro Clarenza CT 18 7743 203353
PaternĂ² CT 18 48228 251581
Camporotondo Etneo CT 18 5023 256604
Mascalucia CT 18 31958 288562
Aci Bonaccorsi CT 19 3524 292086
Giarre CT 19 27659 319745
Tremestieri Etneo CT 19 20589 340334
Aci Sant'Antonio CT 19 17984 358318
San Giovanni la Punta CT 20 23060 381378
Linguaglossa CT 20 5403 386781
Gravina di Catania CT 20 25838 412619

Municipalities with at least 50000 inhabitants

An earthquake occurred to
21 Km NW of Acireale (52622 inhabitants)
27 Km NW of Catania (314555 inhabitants)
73 Km SW of Reggio di Calabria (183035 inhabitants)
73 Km SW of Messina (238439 inhabitants)
79 Km NW of Siracusa (122291 inhabitants)
84 Km E of Caltanissetta (63360 inhabitants)
92 Km N of Ragusa (73313 inhabitants)
95 Km NE of Vittoria (63339 inhabitants)
97 Km NE of Gela (75827 inhabitants)
98 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 1.8 2020-11-27
37.73 14.97 13 2020-11-27
Sala Operativa INGV_OE (Catania) 85041671
Preferred location and magnitude until now.
Origin information


Field Value
Time (UTC) 2020-11-27 04:11:10
Latitude 37.73
Longitude 14.97
Depth (km) 13 (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 85041671


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) 600
Confidence level of the uncertainty (%) 68


Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 45
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


Field Value
Value 1.8
Uncertainty 0.2
Num. used stations
Type of magnitude ML
Reference to an origin 85041671
Agency INGV
Autore Sala Operativa INGV_OE (Catania)
Time of creation (UTC) 2020-11-27 04:29:05
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