INGVCENTRO​NAZIONALE​TERREMOTI
Sala Sismica

Earthquake with magnitude of ML 2.1 on date 04-12-2018 and time 00:39:48 (Italy) in region 1 km SE Galati Mamertino (ME)

A magnitude ML 2.1 earthquake occured in region: 1 km SE Galati Mamertino (ME), on

  • 03-12-2018 23:39:48 (UTC)
  • 04-12-2018 00:39:48 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 38.03, 14.78 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
Galati Mamertino ME 1 2627 2627
Longi ME 2 1473 4100
Tortorici ME 4 6435 10535
San Salvatore di Fitalia ME 5 1319 11854
Frazzanò ME 6 711 12565
Alcara li Fusi ME 7 1980 14545
Castell'Umberto ME 7 3128 17673
Mirto ME 7 974 18647
San Marco d'Alunzio ME 9 1996 20643
Sinagra ME 9 2705 23348
Ucria ME 9 1058 24406
Militello Rosmarino ME 9 1324 25730
Ficarra ME 10 1469 27199
Naso ME 11 3813 31012
Capri Leone ME 11 4515 35527
Torrenova ME 12 4386 39913
Raccuja ME 12 1041 40954
Floresta ME 12 485 41439
Sant'Angelo di Brolo ME 13 3090 44529
Sant'Agata di Militello ME 14 12624 57153
Brolo ME 15 5783 62936
Capo d'Orlando ME 15 13254 76190
San Fratello ME 16 3707 79897
San Piero Patti ME 17 2915 82812
Piraino ME 17 3962 86774
Acquedolci ME 17 5744 92518
Librizzi ME 18 1660 94178
Maniace CT 18 3765 97943
Montagnareale ME 19 1615 99558
Gioiosa Marea ME 19 7074 106632

Municipalities with at least 50000 inhabitants

An earthquake occurred to
57 Km NW of Acireale (52622 inhabitants)
64 Km NW of Catania (314555 inhabitants)
70 Km W of Messina (238439 inhabitants)
76 Km W of Reggio di Calabria (183035 inhabitants)
87 Km NE of Caltanissetta (63360 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 2.1 2018-12-03
23:39:48
38.03 14.78 10 2018-12-04
00:10:03
Sala Sismica INGV-Roma 63626371
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2018-12-03 23:39:48 ± 0.22
Latitude 38.03 ± 0.01
Longitude 14.78 ± 0.02
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 63626371

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1511
Semi-minor axis of confidence ellipse (meter) 952
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 298
Circular confidence region, given by single value of horizontal uncertainty (meter) 1510
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 169
Number of associated phases, regardless of their use for origin computation 20
Number of defining phases 11
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.36
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.38221
Number of stations at which the event was observed 14
Number of stations from which data was used for origin computation 6
Magnitude information

ML:2.1

Field Value
Value 2.1
Uncertainty 0.3
Num. used stations 10
Type of magnitude ML
Reference to an origin 63626371
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2018-12-04 00:10:03
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
GU.SARM.EHZ. 2018-12-03T23:41:20.00 3.0 undecidable manual Pn 6.2 0
IV.SAMA.HHZ. 2018-12-03T23:41:19.29 3.0 undecidable manual Sn 2.13 0
IV.MTRA.EHZ. 2018-12-03T23:40:58.54 3.0 undecidable manual Pg 13.89 0
IV.PANTE.HHZ. 2018-12-03T23:40:54.21 3.0 undecidable manual Sg 2.05 0
IV.SAMA.HHZ. 2018-12-03T23:40:32.70 3.0 negative manual Pn -1.65 0
IV.PAOL.HHZ. 2018-12-03T23:40:30.98 3.0 undecidable manual Pg 11.07 0
IV.MFNL.HHZ. 2018-12-03T23:40:04.80 3.0 negative manual Pg 0.61 0
IV.MTGR.HHZ. 2018-12-03T23:40:02.74 3.0 positive manual Pn -2.41 0
IV.NOV.HHZ. 2018-12-03T23:40:02.21 3.0 undecidable manual S -1.73 0
IV.AIO.HHZ. 2018-12-03T23:40:01.92 0.6 undecidable manual S 99 0.3606 50 -0.37 44
IV.EPZF.HHZ. 2018-12-03T23:39:59.05 0.6 undecidable manual S 163 0.2122 112 1.37 30
IV.EMSG.HHZ. 2018-12-03T23:39:58.88 0.3 undecidable manual S 147 0.2455 50 0 73
IV.IVPL.HHN. 2018-12-03T23:39:57.39 0.1 undecidable manual P 24 0.3822 50 0.42 87
IV.AIO.HHZ. 2018-12-03T23:39:56.23 0.6 negative manual P 99 0.3606 50 -0.38 44
IV.EMSG.HHZ. 2018-12-03T23:39:54.68 0.3 negative manual P 147 0.2455 50 0.05 73
IV.MNO.SHZ. 2018-12-03T23:39:54.36 0.6 undecidable manual S 215 0.1178 127 -0.12 49
IV.MUCR.HHZ. 2018-12-03T23:39:53.24 0.6 undecidable manual S 78 0.0755 139 -0.05 50
IV.EPZF.HHZ. 2018-12-03T23:39:53.66 0.3 positive manual P 163 0.2122 112 -0.28 69
IV.MUCR.HHZ. 2018-12-03T23:39:51.37 0.1 undecidable manual P 78 0.0755 139 -0.04 100
IV.MNO.SHZ. 2018-12-03T23:39:51.92 0.1 positive manual P 215 0.1178 127 -0.17 97
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MUCR.HHN. ML:2.1 0.0018218895 0.3456 AML other m 2018-12-03T23:40:00.98
IV.MUCR.HHE. ML:2.1 0.001896198 0.256 AML other m 2018-12-03T23:40:00.79
IV.MNO.SHN. ML:0 0.00121837275 0.448 AML other m 2018-12-03T23:40:02.14
IV.MNO.SHE. ML:0 0.001105461 0.2432 AML other m 2018-12-03T23:40:02.37
IV.EPZF.HHE. ML:1.8 0.000397188 0.2432 AML other m 2018-12-03T23:40:08.51
IV.EPZF.HHN. ML:2 0.00066067835 0.32 AML other m 2018-12-03T23:40:07.49
IV.EMSG.HHN. ML:2.1 0.0007613592 0.5376 AML other m 2018-12-03T23:40:03.87
IV.EMSG.HHE. ML:2.2 0.0009831973 0.384 AML other m 2018-12-03T23:40:06.31
IV.AIO.HHN. ML:1.5 0.00012112895 0.2432 AML other m 2018-12-03T23:40:09.84
IV.AIO.HHE. ML:1.5 9.7973835E-5 0.384 AML other m 2018-12-03T23:40:09.34
IV.MTGR.HHE. ML:4.4 0.01073697 0.064 AML other m 2018-12-03T23:40:03.97
IV.MTGR.HHN. ML:4.5 0.0115002765 0.0768 AML other m 2018-12-03T23:40:03.95
IV.MFNL.HHN. ML:2.5 0.000123321805 0.064 AML other m 2018-12-03T23:40:10.43
IV.MFNL.HHE. ML:2.4 0.000102985795 0.064 AML other m 2018-12-03T23:40:10.45
IV.SAMA.HHE. ML:4 0.00041947925 0.064 AML other m 2018-12-03T23:40:35.14
IV.SAMA.HHN. ML:4.2 0.00065352785 0.064 AML other m 2018-12-03T23:41:25.96
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