INGVCENTRO​NAZIONALE​TERREMOTI
Sala Sismica

Earthquake with magnitude of ML 2.5 on date 25-12-2018 and time 06:51:46 (Italy) in region 5 km W Zafferana Etnea (CT)

A magnitude ML 2.5 earthquake occured in region: 5 km W Zafferana Etnea (CT), on

  • 25-12-2018 05:51:46 (UTC)
  • 25-12-2018 06:51:46 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 37.7, 15.05 at 1 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 5 9517 9517
Milo CT 7 1087 10604
Santa Venerina CT 8 8592 19196
Pedara CT 9 14102 33298
Nicolosi CT 10 7463 40761
Trecastagni CT 10 10910 51671
Sant'Alfio CT 10 1582 53253
Viagrande CT 11 8563 61816
Ragalna CT 12 3924 65740
Aci Bonaccorsi CT 12 3524 69264
Aci Sant'Antonio CT 12 17984 87248
Giarre CT 13 27659 114907
Belpasso CT 13 28108 143015
Aci Catena CT 14 29851 172866
Tremestieri Etneo CT 14 20589 193455
Mascalucia CT 14 31958 225413
San Giovanni la Punta CT 14 23060 248473
San Pietro Clarenza CT 14 7743 256216
Acireale CT 14 52622 308838
Riposto CT 14 14838 323676
Mascali CT 15 14282 337958
Camporotondo Etneo CT 15 5023 342981
Valverde CT 15 7840 350821
Gravina di Catania CT 15 25838 376659
Sant'Agata li Battiati CT 16 9479 386138
San Gregorio di Catania CT 16 11966 398104
Santa Maria di Licodia CT 17 7641 405745
Biancavilla CT 17 24007 429752
Piedimonte Etneo CT 17 3963 433715
Fiumefreddo di Sicilia CT 18 9623 443338
Linguaglossa CT 18 5403 448741
Aci Castello CT 18 18723 467464
Paternò CT 18 48228 515692
Adrano CT 19 36122 551814
Misterbianco CT 20 49410 601224

Municipalities with at least 50000 inhabitants

An earthquake occurred to
14 Km NW of Acireale (52622 inhabitants)
22 Km N of Catania (314555 inhabitants)
70 Km SW of Reggio di Calabria (183035 inhabitants)
71 Km SW of Messina (238439 inhabitants)
74 Km N of Siracusa (122291 inhabitants)
90 Km E of Caltanissetta (63360 inhabitants)
90 Km N of Ragusa (73313 inhabitants)
95 Km NE of Vittoria (63339 inhabitants)
97 Km N of Modica (54633 inhabitants)
99 Km NE of Gela (75827 inhabitants)
Recent and historical Seismicity

These maps show the seismicity for different time windows. The earthquake locations reported in these maps are determined in quasi real-time by the personnel on duty in the seismic surveillance center of INGV in Rome. Note that the earthquake source parameters (hypocentral location and magnitude) are the best estimates obstained with the available data and they are adjourned as additional data become available. The source parameters obtained by the personnel on duty are then revised by the group in charge of the INGV Seismic Bulletin (Bollettino Sismico Italiano dell’INGV).

Earthquakes of the last three days (72 hours)

Earthquakes of the last three days (72 hours)

This map reports the earthquake epicenters located in the past 72 hours (3 days) from the time this page has been generated. The radius of the circle representing the earthquake on the map scales with magnitude. The color depends on the time of occurrence of the earthquakes with respect to the time of generation of the map (red = 1 hour; orange = 24 hours; yellow = 72 hours). The open star shows the epicenter of the current earthquake.
Earthquakes of the last 90 days

Earthquakes of the last 90 days

This map reports the Magnitudo ≥ 1.0 earthquake epicenters located using the data acquired by the Italian National Seismic Network and by other collaborating networks in Italy and in the neighbouring countries. The radii of the circles representing the epicenters on the map scale with magnitude. The color of each circle depends on the time of occurrence of the earthquakes with respect to the time of generation of the map (red = 1 hour; orange = 24 hours; yellow = 72 hours; blue = all other earthquakes). The open star shows the epicenter of the current earthquake.
Earthquakes since 1985

Earthquakes since 1985

This map reports the Magnitudo ≥ 2.5 earthquake epicenters located using the data acquired by the Italian National Seismic Network and by other collaborating networks in Italy and in the neighbouring countries. The radii of the circles representing the epicenters on the map scale with magnitude. The color of each circle depends on the time of occurrence of the earthquakes with respect to the time of generation of the map (red = 1 hour; orange = 24 hours; yellow = 72 hours; blue = all other earthquakes). The open star shows the epicenter of the current earthquake.
Earthquakes since 1000 AD until 2014

Earthquakes since 1000 AD until 2014

This map shows the epicenters of the historical earthquakes catalogue CPT15 (Catalogo Parametrico dei Terremoti Italiani, 2015 version https://emidius.mi.ingv.it/CPTI15-DBMI15/) with estimated magnitude ≥ 5.0 since 1000 AD until 2014. The epicenters are represented by squares which sides scale with the estimated earthquake magnitude. For earthquakes with magnitude ≥ 6.0, it is also shown the year of occurrence and the magnitude value. The open star shows the epicenter of the current earthquake.
Seismic hazard

Seismic hazard maps provide probabilistic estimates of the earthquake ground shaking exceeding a given threshold in a given geographic region within a given time window. Thus, it is not a deterministic prediction - a target that may be never reached given the complexity of the earthquake physical phenomenon - nor of the maximum expected earthquake since this has extremely low probabilities to occur.

In 2004, it was published the seismic hazard map of Italy (http://zonesismiche.mi.ingv.it) that provides a picture of the most hazardous geographic regions. The seismic hazard map of Italy (GdL MPS, 2004; rif. Ordinanza PCM del 28 aprile 2006, n. 3519, All. 1b) provides the 10% probability of exceedance in 50 years of the horizontal acceleration at rock sites (i.e., Vs30>800 m/s; cat. A, 3.2.1 of the D.M. 14.09.2005).

The colours indicate the various values of the ground acceleration that have 10% to be exceeded within 50 years. In general, the colours associated to low values of acceleration refer to areas that are less hazardous and stronger earthquakes repeat less frequently although they may still occur.

Seismic hazard map

Seismic hazard map

This map shows the seismic hazard map of Italy for the region where the earthquake occurred.
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 2.5 2018-12-25
05:51:46
37.7 15.05 1 2018-12-25
06:13:28
Sala Operativa INGV-OE (Catania) 64206221
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2018-12-25 05:51:46 ± 0
Latitude 37.70
Longitude 15.05
Depth (km) 1 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 200 -> SURVEY-INGV-CT
Event type earthquake
Origin ID 64206221

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)
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)
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:2.5

Field Value
Value 2.5
Uncertainty 0.3
Num. used stations
Type of magnitude ML
Reference to an origin 64206221
Agency INGV
Autore Sala Operativa INGV-OE (Catania)
Time of creation (UTC) 2018-12-25 06:13:28
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Focal Mechanisms

Focal Mechanisms

This map reports the focal mechanisms since 1977 in the region. The white and red beach ball symbols are mechanisms determined using the Regional Centroid Moment Tensor (RCMT, http://www.bo.ingv.it/RCMT) and are determined for earthquakes with magnitude larger than 4.5 in the Euro-Mediterranenan area. Occasionally, when there is a good source-receiver geometry of the target earthquake, the RCMT can be obtained also for earthquakes with magnitude larger than 4.0. The blue and white beach ball symbols indicate the mechanisms obtained from application of the Time Domain Moment Tensor (TDMT, http://cnt.rm.ingv.it/tdmt.html). This technique is used for M ≥ 3.5. The size of the beach ball sysmbol scales with the calculated moment magnitude, Mw.
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download
Waveforms Seismic signals in full SEED format Download