INGVCENTRO​NAZIONALE​TERREMOTI
Sala Sismica

Earthquake with magnitude of Mw 3.4 on date 02-06-2018 and time 09:40:54 (Italy) in region 1 km SW Milo (CT)

A magnitude Mw 3.4 earthquake occured in region: 1 km SW Milo (CT), on

  • 02-06-2018 07:40:54 (UTC)
  • 02-06-2018 09:40:54 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.71, 15.11 at 5 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
Milo CT 1 1087 1087
Zafferana Etnea CT 2 9517 10604
Santa Venerina CT 4 8592 19196
Sant'Alfio CT 5 1582 20778
Giarre CT 7 27659 48437
Riposto CT 9 14838 63275
Mascali CT 9 14282 77557
Trecastagni CT 11 10910 88467
Viagrande CT 11 8563 97030
Pedara CT 11 14102 111132
Aci Sant'Antonio CT 12 17984 129116
Acireale CT 12 52622 181738
Piedimonte Etneo CT 12 3963 185701
Fiumefreddo di Sicilia CT 13 9623 195324
Aci Catena CT 13 29851 225175
Aci Bonaccorsi CT 13 3524 228699
Nicolosi CT 13 7463 236162
Linguaglossa CT 15 5403 241565
Valverde CT 15 7840 249405
San Giovanni la Punta CT 15 23060 272465
Tremestieri Etneo CT 16 20589 293054
Calatabiano CT 16 5308 298362
Mascalucia CT 16 31958 330320
San Gregorio di Catania CT 16 11966 342286
Sant'Agata li Battiati CT 17 9479 351765
San Pietro Clarenza CT 17 7743 359508
Gravina di Catania CT 17 25838 385346
Ragalna CT 18 3924 389270
Aci Castello CT 18 18723 407993
Belpasso CT 18 28108 436101
Camporotondo Etneo CT 19 5023 441124
Castiglione di Sicilia CT 19 3215 444339
Gaggi ME 19 3184 447523

Municipalities with at least 50000 inhabitants

An earthquake occurred to
12 Km NW of Acireale (52622 inhabitants)
23 Km N of Catania (314555 inhabitants)
64 Km SW of Reggio di Calabria (183035 inhabitants)
66 Km SW of Messina (238439 inhabitants)
74 Km N of Siracusa (122291 inhabitants)
94 Km NE of Ragusa (73313 inhabitants)
96 Km E of Caltanissetta (63360 inhabitants)
99 Km NE of Vittoria (63339 inhabitants)
100 Km N of Modica (54633 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

These three maps show the results of the analysis using the software ShakeMap designed to provide the level of ground shaking experienced in a region using the data recorded by seismometers and strong motion instruments and seismological information regarding the attenuation of the wavefield with distance and the site characteristics. The Shakemaps are determined for research purposes to provide fast estimates of the level of ground shaking produced by the earthquake. The maps are calculated automatically and adjourned progressively as more data become available. See http://shakemap.rm.ingv.it/ for additional information.

The red star indicates the epicenter. The red triangles show the stations of the INGV Italian National Seismic Network and the blue triangles those of the Nationa Accelerometric Network of the Dipartimento della Protezione Civile.

Intensity Shakemap

Intensity Shakemap

This map shows the distribution of the istrumentally derived intensities. To this purpose, it is used a conversion relation between ground acceleration and velocity, and the Mercalli Modificata (MMI - Modified Mercalli Intensity) scale. In general, the Mercalli intensity scale relies on the effects that the ground shaking produces as reported by an observer.
Peak ground acceleration Shakemap

Peak ground acceleration Shakemap

This map shows This map shows the distribution of peak ground acceleration expressed as per cent of the acceleration of gravity (i.e., g = 9.81 m/s²).
Peak velocity Shakemap

Peak velocity Shakemap

This map shows the distribution of peak ground velocities expressed in cm/s.
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 501 Mw 3.4 2018-06-02
07:40:54
37.71 15.11 8 2018-06-04
08:31:12
TDMT-INGV Revised 57519511
Rev 200 ML 3.3 2018-06-02
07:40:54
37.71 15.11 5 2018-06-02
07:56:16
Sala Operativa INGV-OE (Catania) 57451851
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2018-06-02 07:40:54 ± 0
Latitude 37.71
Longitude 15.11
Depth (km) 5 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 200 -> SURVEY-INGV-CT
Event type earthquake
Origin ID 57451851

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) 200
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 78
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) 0.19
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
Magnitudes information

Mw:3.4

Field Value
Value 3.4
Uncertainty
Num. used stations
Type of magnitude Mw
Reference to an origin 57519511
Agency INGV
Autore TDMT-INGV Revised
Time of creation (UTC) 2018-06-04 08:31:12

ML:3.3

Field Value
Value 3.3
Uncertainty 0.1
Num. used stations
Type of magnitude ML
Reference to an origin 57451851
Agency INGV
Autore Sala Operativa INGV-OE (Catania)
Time of creation (UTC) 2018-06-02 07:56:16
TDMT - Time Domain Moment Tensor

TDMT details

Field Value
Magnitude3.4
Scalar Moment1.35435E+21 dyne-cm
Computed depth8 km
QualityBa
Variance Reduction40.11%
Double Couple75%
CLVD25%
ISO0%
Model usedCIA
Modemanual
Statusreviewed

Moment Tensor Components

Component Value
Mrr1.99E+20
Mtt8.343E+20
Mpp-1.0333E+21
Mrt-2.449E+20
Mrp-7.06E+19
Mtp-9.44E+20

Nodal Planes

Name Strike Dip Rake
PN124786168
PN2338784

Focal Mechanism

Focal Mechanism

psmeca (GMT documentation)

15.111 37.713 8 247 86 168 338 78 4 1.35435 21 15.611 38.213

TDMT references

More info and references

Station Distribution

Station Distribution

TDMT station details

Sta Dist Azi V R zcor
AIO 30.6 20.5 43.46% 94
ESML 23 242.8 41.67% 96
IVGP 77 350.2 38.23% 101
IVPL 74.5 351.2 33.02% 101
CEL 91.8 48.3 10.29% 102
MUCR 42.2 330.4 56.81% 98
MPNC 52.6 23.8 25.68% 97
JOPP 120.2 34.1 17.93% 104
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