INGVCENTRO​NAZIONALE​TERREMOTI
Sala Sismica

Earthquake with magnitude of ML 2.2 on date 12-12-2018 and time 17:15:34 (Italy) in region 3 km SE Riposto (CT)

A magnitude ML 2.2 earthquake occured in region: 3 km SE Riposto (CT), on

  • 12-12-2018 16:15:34 (UTC)
  • 12-12-2018 17:15:34 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 37.71, 15.22 at 10 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

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
Riposto CT 3 14838 14838
Giarre CT 4 27659 42497
Mascali CT 6 14282 56779
Santa Venerina CT 7 8592 65371
Sant'Alfio CT 7 1582 66953
Milo CT 9 1087 68040
Fiumefreddo di Sicilia CT 9 9623 77663
Zafferana Etnea CT 10 9517 87180
Piedimonte Etneo CT 12 3963 91143
Acireale CT 12 52622 143765
Calatabiano CT 13 5308 149073
Aci Catena CT 13 29851 178924
Aci Sant'Antonio CT 14 17984 196908
Viagrande CT 15 8563 205471
Aci Bonaccorsi CT 15 3524 208995
Giardini-Naxos ME 16 9415 218410
Trecastagni CT 16 10910 229320
Linguaglossa CT 16 5403 234723
Valverde CT 16 7840 242563
Pedara CT 17 14102 256665
Taormina ME 17 10960 267625
Gaggi ME 17 3184 270809
Castelmola ME 18 1088 271897
San Giovanni la Punta CT 18 23060 294957
Aci Castello CT 18 18723 313680
San Gregorio di Catania CT 19 11966 325646
Tremestieri Etneo CT 19 20589 346235
Nicolosi CT 20 7463 353698

Municipalities with at least 50000 inhabitants

An earthquake occurred to
12 Km NE of Acireale (52622 inhabitants)
26 Km NE of Catania (314555 inhabitants)
58 Km SW of Reggio di Calabria (183035 inhabitants)
62 Km SW of Messina (238439 inhabitants)
72 Km N of Siracusa (122291 inhabitants)
97 Km NE of Ragusa (73313 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 100 ML 2.2 2018-12-12
16:15:34
37.71 15.22 10 2018-12-12
16:27:07
Sala Sismica INGV-Roma 63868071
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2018-12-12 16:15:34 ± 0.23
Latitude 37.71 ± 0.01
Longitude 15.22 ± 0.02
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 63868071

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1860
Semi-minor axis of confidence ellipse (meter) 1150
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 261
Circular confidence region, given by single value of horizontal uncertainty (meter) 1860
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 165
Number of associated phases, regardless of their use for origin computation 17
Number of defining phases 17
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.52
Epicentral distance of station closest to the epicenter (degree) 0.16458
Epicentral distance of station farthest from the epicenter (degree) 0.87774
Number of stations at which the event was observed 14
Number of stations from which data was used for origin computation 14
Magnitude information

ML:2.2

Field Value
Value 2.2
Uncertainty 0.3
Num. used stations 23
Type of magnitude ML
Reference to an origin 63868071
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2018-12-12 16:27:07
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.PETRA.HHZ. 2018-12-12T16:15:52.02 0.1 undecidable manual P 278 0.8777 50 0.87 71
IV.AGST.EHZ. 2018-12-12T16:15:51.29 0.3 undecidable manual S 179 0.4533 50 0.6 65
IV.HAGA.HHZ. 2018-12-12T16:15:50.18 0.3 undecidable manual S 186 0.4272 50 0.26 72
IV.IVPL.HHZ. 2018-12-12T16:15:48.22 0.1 undecidable manual P 345 0.6916 50 0.26 91
IV.CAGR.HHZ. 2018-12-12T16:15:47.13 0.1 undecidable manual P 261 0.5729 50 1.21 65
IV.GALF.HHZ. 2018-12-12T16:15:45.31 0.1 undecidable manual P 270 0.5126 50 0.41 91
IV.MPNC.HHZ. 2018-12-12T16:15:44.60 0.3 undecidable manual P 14 0.4497 50 0.77 61
IV.AGST.EHZ. 2018-12-12T16:15:43.36 0.1 negative manual P 179 0.4533 50 -0.52 90
IV.MUCR.HHZ. 2018-12-12T16:15:43.14 0.3 undecidable manual P 321 0.4281 50 -0.32 71
IV.HAGA.HHZ. 2018-12-12T16:15:42.75 0.1 positive manual P 186 0.4272 50 -0.68 85
IV.ESLN.HHZ. 2018-12-12T16:15:42.32 0.6 undecidable manual S 265 0.1907 115 -0.38 49
IV.EPZF.HHZ. 2018-12-12T16:15:41.50 0.6 undecidable manual P 292 0.3049 50 0.15 50
IV.ESML.HHZ. 2018-12-12T16:15:40.57 0.3 positive manual P 251 0.2806 50 -0.36 72
IV.AIO.HHZ. 2018-12-12T16:15:40.07 0.1 positive manual P 3 0.2617 50 -0.54 93
IV.EMSG.HHZ. 2018-12-12T16:15:39.76 1.0 negative manual P 298 0.2374 50 -0.43 24
IV.ESLN.HHZ. 2018-12-12T16:15:38.41 0.3 positive manual P 265 0.1907 115 -0.86 62
IV.EMCN.HNZ. 2018-12-12T16:15:38.45 0.1 undecidable manual P 300 0.1646 119 -0.3 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.EPOZ.HHN. ML:2.8 0.01108 0.16 AML other m 2018-12-12T16:15:39.94
IV.EPOZ.HHE. ML:2.5 0.005985 0.62 AML other m 2018-12-12T16:15:41.17
IV.EMCN.HNN. ML:2.6 0.003395 1.42 AML other m 2018-12-12T16:15:42.76
IV.ESLN.HHE. ML:2.3 0.00144 0.48 AML other m 2018-12-12T16:15:44.34
IV.EMCN.HNE. ML:2.6 0.00292 0.42 AML other m 2018-12-12T16:15:46.43
IV.ESLN.HHN. ML:2.1 0.000985 1.18 AML other m 2018-12-12T16:15:46.28
IV.AIO.HHE. ML:1.8 0.000344 0.2 AML other m 2018-12-12T16:15:47.37
IV.AIO.HHN. ML:1.9 0.000379 0.98 AML other m 2018-12-12T16:15:47.10
IV.EMSG.HHN. ML:2.4 0.00127 0.8 AML other m 2018-12-12T16:15:49.90
IV.ESML.HHE. ML:2 0.000458 0.82 AML other m 2018-12-12T16:15:49.22
IV.ESML.HHN. ML:2 0.000474 0.94 AML other m 2018-12-12T16:15:49.91
IV.EPZF.HHE. ML:2.2 0.000635 0.3 AML other m 2018-12-12T16:15:50.04
IV.EPZF.HHN. ML:2.2 0.000636 0.54 AML other m 2018-12-12T16:15:50.32
IV.HAGA.HHE. ML:2.1 0.0003425 0.6 AML other m 2018-12-12T16:15:50.61
IV.HAGA.HHN. ML:1.7 0.0001575 1.26 AML other m 2018-12-12T16:15:50.64
IV.AGST.EHE. ML:2.2 0.0004355 0.52 AML other m 2018-12-12T16:15:51.67
IV.AGST.EHN. ML:2.3 0.000487 0.66 AML other m 2018-12-12T16:15:51.47
IV.EMSG.HHE. ML:2.4 0.0013435 1.64 AML other m 2018-12-12T16:15:53.00
IV.MUCR.HHE. ML:2 0.000243 0.94 AML other m 2018-12-12T16:15:53.92
IV.MPNC.HHN. ML:2 0.000239 1.4 AML other m 2018-12-12T16:15:54.19
IV.MUCR.HHN. ML:1.8 0.0001865 0.7 AML other m 2018-12-12T16:15:54.22
IV.SSY.HHN. ML:2.8 0.0012075 1.12 AML other m 2018-12-12T16:15:57.03
IV.SSY.HHE. ML:2.5 0.000664 1.36 AML other m 2018-12-12T16:15:57.86
IV.MPNC.HHE. ML:0 0.0002225 0.46 AML other m 2018-12-12T16:16:00.80
IV.IVPL.HHN. ML:0 0.000339 1.16 AML other m 2018-12-12T16:16:02.74
IV.IVPL.HHE. ML:0 0.0003 1.56 AML other m 2018-12-12T16:16:03.14
IV.GALF.HHE. ML:0 0.00010895 0.62 AML other m 2018-12-12T16:16:05.41
IV.GALF.HHN. ML:0 9.78E-5 0.52 AML other m 2018-12-12T16:16:06.49
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