INGVCENTRO​NAZIONALE​TERREMOTI
Sala Sismica

Earthquake with magnitude of ML 1.9 on date 04-12-2017 and time 01:51:16 (Italy) in region 8 km W Milo (CT)

A magnitude ML 1.9 earthquake occured in region: 8 km W Milo (CT), on

  • 04-12-2017 00:51:16 (UTC)
  • 04-12-2017 01:51:16 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 37.76, 15.03 at 10 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
Milo CT 9 1087 1087
Zafferana Etnea CT 10 9517 10604
Sant'Alfio CT 10 1582 12186
Santa Venerina CT 12 8592 20778
Linguaglossa CT 14 5403 26181
Giarre CT 14 27659 53840
Piedimonte Etneo CT 14 3963 57803
Mascali CT 15 14282 72085
Randazzo CT 15 10900 82985
Riposto CT 16 14838 97823
Pedara CT 16 14102 111925
Nicolosi CT 16 7463 119388
Moio Alcantara ME 16 717 120105
Castiglione di Sicilia CT 16 3215 123320
Trecastagni CT 16 10910 134230
Ragalna CT 16 3924 138154
Fiumefreddo di Sicilia CT 16 9623 147777
Maletto CT 17 3920 151697
Viagrande CT 17 8563 160260
Bronte CT 18 19172 179432
Malvagna ME 18 733 180165
Francavilla di Sicilia ME 19 3945 184110
Santa Domenica Vittoria ME 19 980 185090
Aci Sant'Antonio CT 19 17984 203074
Calatabiano CT 19 5308 208382
Aci Bonaccorsi CT 19 3524 211906
Belpasso CT 19 28108 240014
Biancavilla CT 19 24007 264021
Roccella Valdemone ME 20 666 264687
Aci Catena CT 20 29851 294538
Motta Camastra ME 20 845 295383
Santa Maria di Licodia CT 20 7641 303024

Municipalities with at least 50000 inhabitants

An earthquake occurred to
20 Km NW of Acireale (52622 inhabitants)
29 Km N of Catania (314555 inhabitants)
67 Km SW of Reggio di Calabria (183035 inhabitants)
67 Km SW of Messina (238439 inhabitants)
81 Km N of Siracusa (122291 inhabitants)
90 Km E of Caltanissetta (63360 inhabitants)
96 Km N of Ragusa (73313 inhabitants)
100 Km NE of Vittoria (63339 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.
Significant earthquakes since 1000 AD until 2006

Significant earthquakes since 1000 AD until 2006 *

This map shows the epicenters of the historical earthquakes catalogue CPT11 (Catalogo Parametrico dei Terremoti Italiani, 2011 version) with estimated magnitude ≥ 5.0 since 1000 AD until 2006. 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 2017-12-04
00:51:16
37.76 15.03 10 2018-09-04
09:10:38
Bollettino Sismico Italiano INGV 52548921
Rev 100 ML 2.0 2017-12-04
00:51:16
37.76 15.04 10 2017-12-04
01:02:22
Sala Sismica INGV-Roma 52322091
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2017-12-04 00:51:16 ± 0.07
Latitude 37.76 ± 0.00
Longitude 15.03 ± 0.01
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 52548921

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 521
Semi-minor axis of confidence ellipse (meter) 507
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 237
Circular confidence region, given by single value of horizontal uncertainty (meter) 520
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 56
Number of associated phases, regardless of their use for origin computation 24
Number of defining phases 24
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.24
Epicentral distance of station closest to the epicenter (degree) 0.07824
Epicentral distance of station farthest from the epicenter (degree) 0.86695
Number of stations at which the event was observed 18
Number of stations from which data was used for origin computation 18
Magnitudes information

ML:2

Field Value
Value 2
Uncertainty 0.3
Num. used stations 16
Type of magnitude ML
Reference to an origin 52322091
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2017-12-04 01:02:22

ML:1.9

Field Value
Value 1.9
Uncertainty 0.3
Num. used stations 14
Type of magnitude ML
Reference to an origin 52548921
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2017-12-12 09:47:04
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.SOI.EHN. 2017-12-04T00:51:33.20 0.6 undecidable manual P 68 0.8669 50 -0.09 43
MN.CEL.HHN. 2017-12-04T00:51:33.06 0.3 undecidable manual P 53 0.8454 50 0.14 64
IV.SSY.HHZ. 2017-12-04T00:51:29.10 0.3 undecidable manual P 177 0.6007 50 0.36 64
IV.MSRU.HHN. 2017-12-04T00:51:29.78 0.6 undecidable manual P 37 0.6304 50 0.53 41
IV.MTTG.HHE. 2017-12-04T00:51:28.83 0.3 undecidable manual P 65 0.5828 50 0.41 64
IV.AIO.HHZ. 2017-12-04T00:51:27.51 0.6 undecidable manual S 37 0.2662 50 -0.03 49
IV.AGST.EHZ. 2017-12-04T00:51:27.19 0.6 undecidable manual P 163 0.5252 50 -0.25 44
IV.HAGA.HHE. 2017-12-04T00:51:26.91 1.0 undecidable manual P 168 0.4829 50 0.19 23
IV.MSFR.HHZ. 2017-12-04T00:51:26.29 0.3 undecidable manual P 309 0.4425 50 0.26 67
IV.GALF.HHZ. 2017-12-04T00:51:25.12 0.6 undecidable manual P 263 0.3696 50 0.34 45
IV.HLNI.HHZ. 2017-12-04T00:51:25.49 0.3 undecidable manual P 197 0.4281 50 -0.29 67
IV.ESML.HHZ. 2017-12-04T00:51:24.80 0.6 undecidable manual S 220 0.1835 115 0.12 49
IV.EPZF.HHZ. 2017-12-04T00:51:24.01 1.0 undecidable manual S 296 0.152 120 0.43 23
IV.EPOZ.HHZ. 2017-12-04T00:51:23.48 0.6 undecidable manual S 124 0.152 120 -0.11 49
IV.NOV.HHZ. 2017-12-04T00:51:23.03 0.3 undecidable manual P 17 0.2824 50 -0.26 70
IV.MUCR.HHZ. 2017-12-04T00:51:23.54 0.1 undecidable manual P 337 0.3103 50 -0.23 93
IV.EMSG.HHZ. 2017-12-04T00:51:22.06 0.6 undecidable manual S 315 0.089 134 0.42 47
IV.AIO.HHZ. 2017-12-04T00:51:22.49 0.3 undecidable manual P 37 0.2662 50 -0.53 66
IV.ESLN.HHZ. 2017-12-04T00:51:21.39 0.6 undecidable manual S 214 0.0782 138 0.04 50
IV.EPOZ.HHZ. 2017-12-04T00:51:21.00 0.1 positive manual P 124 0.152 120 0.26 95
IV.ESML.HHZ. 2017-12-04T00:51:21.42 0.3 undecidable manual P 220 0.1835 115 0.05 74
IV.EPZF.HHZ. 2017-12-04T00:51:20.58 0.1 undecidable manual P 296 0.152 120 -0.16 97
IV.EMSG.HHZ. 2017-12-04T00:51:19.54 0.1 positive manual P 315 0.089 134 -0.08 100
IV.ESLN.HHZ. 2017-12-04T00:51:18.99 0.1 negative manual P 214 0.0782 138 -0.46 93
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MUCR.HHE. ML:1.6 0.0001515 0.9 AML other m 2017-12-04T00:51:32.59
IV.EMSG.HHE. ML:2.5 0.00438 0.2 AML other m 2017-12-04T00:51:23.77
IV.EPZF.HHE. ML:0 0.001945 0.3 AML other m 2017-12-04T00:51:25.85
IV.EPOZ.HHE. ML:2.3 0.00166 0.58 AML other m 2017-12-04T00:51:26.70
IV.ESML.HHE. ML:0 0.000591 0.8 AML other m 2017-12-04T00:51:26.35
IV.ESML.HHN. ML:0 0.000517 0.4 AML other m 2017-12-04T00:51:27.27
IV.EPOZ.HHN. ML:2.4 0.002055 1.24 AML other m 2017-12-04T00:51:27.14
IV.EPZF.HHN. ML:0 0.002275 0.3 AML other m 2017-12-04T00:51:27.11
IV.AIO.HHE. ML:1.8 0.0003335 0.4 AML other m 2017-12-04T00:51:30.05
IV.AIO.HHN. ML:1.7 0.000253 0.28 AML other m 2017-12-04T00:51:30.54
IV.MUCR.HHN. ML:1.7 0.0002155 0.66 AML other m 2017-12-04T00:51:32.81
IV.ESLN.HHN. ML:1.8 0.000933083 0.22 AML other m 2017-12-04T00:51:21.42
IV.ESLN.HHE. ML:1.9 0.00107962135 0.26 AML other m 2017-12-04T00:51:21.41
IV.AGST.EHE. ML:1.6 9.371746E-5 0.68 AML other m 2017-12-04T00:51:35.33
IV.AGST.EHN. ML:1.7 0.00010668809 0.76 AML other m 2017-12-04T00:51:35.57
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