INGVCENTRO​NAZIONALE​TERREMOTI
Sala Sismica

Earthquake with magnitude of ML 1.9 on date 18-12-2018 and time 10:31:28 (Italy) in region 11 km N Ragalna (CT)

A magnitude ML 1.9 earthquake occured in region: 11 km N Ragalna (CT), on

  • 18-12-2018 09:31:28 (UTC)
  • 18-12-2018 10:31:28 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 37.73, 14.97 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 11 3924 3924
Zafferana Etnea CT 13 9517 13441
Biancavilla CT 13 24007 37448
Bronte CT 13 19172 56620
Milo CT 13 1087 57707
Adrano CT 14 36122 93829
Nicolosi CT 14 7463 101292
Maletto CT 14 3920 105212
Santa Maria di Licodia CT 14 7641 112853
Pedara CT 15 14102 126955
Belpasso CT 15 28108 155063
Sant'Alfio CT 16 1582 156645
Santa Venerina CT 16 8592 165237
Trecastagni CT 16 10910 176147
Randazzo CT 17 10900 187047
Viagrande CT 18 8563 195610
Paternò CT 18 48228 243838
San Pietro Clarenza CT 18 7743 251581
Camporotondo Etneo CT 18 5023 256604
Mascalucia CT 19 31958 288562
Giarre CT 19 27659 316221
Aci Bonaccorsi CT 19 3524 319745
Tremestieri Etneo CT 20 20589 340334
Aci Sant'Antonio CT 20 17984 358318
Linguaglossa CT 20 5403 363721

Municipalities with at least 50000 inhabitants

An earthquake occurred to
22 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)
80 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)
99 Km N of Modica (54633 inhabitants)
Recent and historical Seismicity
Seismic hazard
Shakemap
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 (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
Rev 200 ML 1.9 2018-12-18
09:31:28
37.73 14.97 4 2018-12-18
10:09:10
Sala Operativa INGV-OE (Catania) 63980841
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2018-12-18 09:31:28 ± 0
Latitude 37.73
Longitude 14.97
Depth (km) 4 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 200 -> SURVEY-INGV-CT
Event type earthquake
Origin ID 63980841

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) 400
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 54
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

ML:1.9

Field Value
Value 1.9
Uncertainty 0.2
Num. used stations
Type of magnitude ML
Reference to an origin 63980841
Agency INGV
Autore Sala Operativa INGV-OE (Catania)
Time of creation (UTC) 2018-12-18 10:09:10
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download