Earthquake with magnitude of ML 1.9 on date 11-12-2018 and time 23:41:28 (UTC) in region 4 km S Zafferana Etnea (CT)

A magnitude ML 1.9 earthquake occured in region: 4 km S Zafferana Etnea (CT), on

  • 11-12-2018 23:41:28 (UTC)
  • 12-12-2018 00:41:28 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 37.66, 15.1 at 2 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

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 4 9517 9517
Santa Venerina CT 5 8592 18109
Trecastagni CT 5 10910 29019
Viagrande CT 5 8563 37582
Pedara CT 6 14102 51684
Aci Sant'Antonio CT 6 17984 69668
Aci Bonaccorsi CT 7 3524 73192
Aci Catena CT 7 29851 103043
Milo CT 8 1087 104130
Acireale CT 8 52622 156752
Nicolosi CT 8 7463 164215
San Giovanni la Punta CT 9 23060 187275
Valverde CT 9 7840 195115
Tremestieri Etneo CT 9 20589 215704
San Gregorio di Catania CT 10 11966 227670
Mascalucia CT 10 31958 259628
Sant'Alfio CT 10 1582 261210
Giarre CT 11 27659 288869
Sant'Agata li Battiati CT 11 9479 298348
Gravina di Catania CT 11 25838 324186
San Pietro Clarenza CT 12 7743 331929
Aci Castello CT 12 18723 350652
Riposto CT 12 14838 365490
Camporotondo Etneo CT 13 5023 370513
Belpasso CT 13 28108 398621
Mascali CT 14 14282 412903
Ragalna CT 15 3924 416827
Catania CT 17 314555 731382
Misterbianco CT 17 49410 780792
Fiumefreddo di Sicilia CT 18 9623 790415
Piedimonte Etneo CT 18 3963 794378
Santa Maria di Licodia CT 19 7641 802019
Paternò CT 20 48228 850247
Motta Sant'Anastasia CT 20 12116 862363

Municipalities with at least 50000 inhabitants

An earthquake occurred to
8 Km NW of Acireale (52622 inhabitants)
17 Km N of Catania (314555 inhabitants)
69 Km N of Siracusa (122291 inhabitants)
69 Km SW of Reggio di Calabria (183035 inhabitants)
72 Km SW of Messina (238439 inhabitants)
88 Km NE of Ragusa (73313 inhabitants)
93 Km NE of Vittoria (63339 inhabitants)
93 Km E of Caltanissetta (63360 inhabitants)
94 Km NE of Modica (54633 inhabitants)
100 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
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 1000 ML 1.9 2018-12-11
23:41:28
37.66 15.1 2 2019-06-04
09:16:07
Bollettino Sismico Italiano INGV 64840851
Rev 100 ML 2.1 2018-12-11
23:41:28
37.66 15.1 2 2018-12-11
23:55:49
Sala Sismica INGV-Roma 63849131
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2018-12-11 23:41:28 ± 0.11
Latitude 37.66 ± 0.00
Longitude 15.10 ± 0.01
Depth (km) 2 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 64840851

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 710
Semi-minor axis of confidence ellipse (meter) 490
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 262
Circular confidence region, given by single value of horizontal uncertainty (meter) 710
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 88
Number of associated phases, regardless of their use for origin computation 21
Number of defining phases 21
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.34
Epicentral distance of station closest to the epicenter (degree) 0.07015
Epicentral distance of station farthest from the epicenter (degree) 0.68528
Number of stations at which the event was observed 14
Number of stations from which data was used for origin computation 14
Magnitudes information

ML:1.9

Field Value
Value 1.9
Uncertainty 0.3
Num. used stations 10
Type of magnitude ML
Reference to an origin 64840851
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2019-01-21 13:02:58

ML:2.1

Field Value
Value 2.1
Uncertainty 0.3
Num. used stations 12
Type of magnitude ML
Reference to an origin 63849131
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2018-12-11 23:55:49
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.SSY.HHZ. 2018-12-11T23:41:47.41 0.6 undecidable manual S 183 0.5 50 0 53
IV.AGST.EHZ. 2018-12-11T23:41:44.59 0.3 undecidable manual S 166 0.4128 93 0.47 73
IV.MSRU.HHN. 2018-12-11T23:41:43.03 0.3 undecidable manual P 28 0.6853 50 0.58 67
IV.HAGA.HHZ. 2018-12-11T23:41:43.44 0.6 undecidable manual S 174 0.375 93 0.79 43
IV.HLNI.HHZ. 2018-12-11T23:41:42.26 0.3 undecidable manual S 211 0.3588 93 0.22 78
IV.MPNC.HHE. 2018-12-11T23:41:40.06 0.6 undecidable manual P 22 0.527 50 0.31 49
IV.SSY.HHZ. 2018-12-11T23:41:39.01 0.3 undecidable manual P 183 0.5 50 -0.28 75
IV.MUCR.HHN. 2018-12-11T23:41:38.08 0.3 undecidable manual P 335 0.4254 93 0.41 74
IV.AGST.EHZ. 2018-12-11T23:41:36.62 0.3 undecidable manual P 166 0.4128 93 -0.77 65
IV.HAGA.HHZ. 2018-12-11T23:41:36.05 0.6 undecidable manual P 174 0.375 93 -0.5 49
IV.NOV.HHZ. 2018-12-11T23:41:36.69 0.3 undecidable manual P 4 0.3705 93 0.23 78
IV.ESML.HHZ. 2018-12-11T23:41:35.08 0.3 undecidable manual S 257 0.1808 97 -0.12 82
IV.HLNI.HHZ. 2018-12-11T23:41:35.66 0.3 undecidable manual P 211 0.3588 93 -0.53 72
IV.AIO.HHZ. 2018-12-11T23:41:35.51 0.6 undecidable manual P 18 0.3301 94 -0.04 54
IV.EPZF.HHE. 2018-12-11T23:41:34.24 0.3 undecidable manual P 311 0.2554 95 0.35 77
IV.EMCN.HNZ. 2018-12-11T23:41:33.68 0.3 undecidable manual S 338 0.1439 98 -0.13 83
IV.ESML.HHZ. 2018-12-11T23:41:32.72 0.3 undecidable manual P 257 0.1808 97 0.48 76
IV.ESLN.HHZ. 2018-12-11T23:41:32.57 0.3 undecidable manual S 290 0.107 101 0.17 83
IV.ESLN.HHZ. 2018-12-11T23:41:30.19 0.3 undecidable manual P 290 0.107 101 -0.44 78
IV.EMCN.HNZ. 2018-12-11T23:41:30.88 0.1 undecidable manual P 338 0.1439 98 -0.55 100
IV.EPOZ.HHE. 2018-12-11T23:41:29.60 0.3 undecidable manual P 78 0.0701 107 -0.21 83
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ESLN.HHN. ML:2.3 0.003120774 0.4352 AML other m 2018-12-11T23:41:37.56
IV.ESLN.HHE. ML:2.5 0.0046234275 0.4608 AML other m 2018-12-11T23:41:37.33
IV.EMCN.HNE. ML:2.1 0.0013683975 0.2048 AML other m 2018-12-11T23:41:37.22
IV.EMCN.HNN. ML:2.1 0.001378152 0.1152 AML other m 2018-12-11T23:41:34.68
IV.ESML.HHN. ML:2.1 0.00108844745 0.576 AML other m 2018-12-11T23:41:42.76
IV.ESML.HHE. ML:2 0.0009388144 0.4096 AML other m 2018-12-11T23:41:43.26
IV.AIO.HHE. ML:1.5 0.000133563255 0.3968 AML other m 2018-12-11T23:41:45.17
IV.AIO.HHN. ML:1.8 0.0002705807 0.4352 AML other m 2018-12-11T23:41:45.99
IV.HLNI.HHN. ML:1.4 9.7169535E-5 0.256 AML other m 2018-12-11T23:41:46.63
IV.HLNI.HHE. ML:1.4 9.185536E-5 0.2432 AML other m 2018-12-11T23:41:43.37
IV.AGST.EHE. ML:2 0.00031426975 0.2048 AML other m 2018-12-11T23:41:44.92
IV.AGST.EHN. ML:2 0.00026306312 0.2304 AML other m 2018-12-11T23:41:45.87
IV.SSY.HHE. ML:2.3 0.0004954029 0.4864 AML other m 2018-12-11T23:41:47.85
IV.SSY.HHN. ML:2.5 0.0007296811 0.2304 AML other m 2018-12-11T23:41:50.84
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://terremoti.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