Earthquake with magnitude of ML 3.6 on date 16-12-2008 and time 03:30:14 (Italy) in region 4 km NE Ragalna (CT)

A magnitude ML 3.6 earthquake occured in region: 4 km NE Ragalna (CT), on

  • 16-12-2008 02:30:14 (UTC)
  • 16-12-2008 03:30:14 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 37.66, 14.96 at 5 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
Ragalna CT 4 3924 3924
Nicolosi CT 7 7463 11387
Belpasso CT 8 28108 39495
Santa Maria di Licodia CT 8 7641 47136
Biancavilla CT 9 24007 71143
Pedara CT 10 14102 85245
Paternò CT 11 48228 133473
Camporotondo Etneo CT 11 5023 138496
San Pietro Clarenza CT 11 7743 146239
Trecastagni CT 11 10910 157149
Adrano CT 12 36122 193271
Mascalucia CT 12 31958 225229
Viagrande CT 13 8563 233792
Zafferana Etnea CT 13 9517 243309
Tremestieri Etneo CT 13 20589 263898
Gravina di Catania CT 14 25838 289736
Aci Bonaccorsi CT 14 3524 293260
San Giovanni la Punta CT 15 23060 316320
Sant'Agata li Battiati CT 15 9479 325799
Milo CT 15 1087 326886
Aci Sant'Antonio CT 15 17984 344870
Santa Venerina CT 16 8592 353462
Misterbianco CT 16 49410 402872
Motta Sant'Anastasia CT 16 12116 414988
San Gregorio di Catania CT 16 11966 426954
Valverde CT 17 7840 434794
Aci Catena CT 17 29851 464645
Sant'Alfio CT 18 1582 466227
Bronte CT 18 19172 485399
Acireale CT 19 52622 538021
Aci Castello CT 20 18723 556744

Municipalities with at least 50000 inhabitants

An earthquake occurred to
19 Km W of Acireale (52622 inhabitants)
20 Km NW of Catania (314555 inhabitants)
73 Km NW of Siracusa (122291 inhabitants)
78 Km SW of Reggio di Calabria (183035 inhabitants)
79 Km SW of Messina (238439 inhabitants)
82 Km E of Caltanissetta (63360 inhabitants)
84 Km N of Ragusa (73313 inhabitants)
88 Km NE of Vittoria (63339 inhabitants)
91 Km N of Modica (54633 inhabitants)
91 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.
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

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
Bulletin
Rev1000
ML 3.6 2008-12-16
02:30:14
37.66 14.97 5 2014-10-21
12:27:13
Bollettino Sismico Italiano INGV 732459
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2008-12-16 02:30:14 ± 0.13
Latitude 37.66 ± 0.00
Longitude 14.97 ± 0.01
Depth (km) 5 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-SISPICK
Event type earthquake
Origin ID 732459

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 673
Semi-minor axis of confidence ellipse (meter) 447
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 77
Circular confidence region, given by single value of horizontal uncertainty (meter) 943.4
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 94
Number of associated phases, regardless of their use for origin computation 29
Number of defining phases 23
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.42
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 1.33279
Number of stations at which the event was observed 21
Number of stations from which data was used for origin computation 15
Magnitude information

ML:3.6

Field Value
Value 3.6
Uncertainty 0
Num. used stations
Type of magnitude ML
Reference to an origin 732459
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-05 13:51:21
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.GRI.EHZ. 2008-12-16T02:30:42.84 10.0 undecidable manual Pg 0 0 0
IV.CORL.HHN. 2008-12-16T02:30:40.09 0.3 undecidable manual Pg 281 1.3328 1.015 45
IV.HMDC.BHZ. 2008-12-16T02:30:39.09 0.3 undecidable manual Sg 192 0.715 0.008 71
IV.HAVL.BHN. 2008-12-16T02:30:39.14 0.3 undecidable manual Sg 170 0.7105 0.184 69
IV.SSY.BHN. 2008-12-16T02:30:33.38 0.3 undecidable manual Sg 170 0.509 0.4 68
.HVZN.BHN. 2008-12-16T02:30:33.35 0.6 undecidable manual Sg 202 0.5198 0.039 49
MN.CEL.HHZ. 2008-12-16T02:30:32.81 0.3 undecidable manual Pg 50 0.947 0.339 63
.AGST.EHN. 2008-12-16T02:30:31.35 0.3 undecidable manual Sg 153 0.4533 0.016 75
I1.HAGA.BHE. 2008-12-16T02:30:30.01 0.3 undecidable manual Sg 158 0.4038 0.322 71
IV.GIB.EHN. 2008-12-16T02:30:30.62 0.3 undecidable manual Pg 294 0.8112 0.466 63
IV.HCRL.BHN. 2008-12-16T02:30:29.08 0.3 undecidable manual Sg 172 0.3804 0.294 72
IV.MSRU.BHN. 2008-12-16T02:30:28.75 0.1 undecidable manual Pg 35 0.7401 -0.19 91
IV.HAVL.BHN. 2008-12-16T02:30:28.15 0.1 undecidable manual Pg 170 0.7105 -0.28 90
IV.HMDC.BHZ. 2008-12-16T02:30:28.02 0.3 undecidable manual Pg 192 0.715 -0.484 64
.IVPL.BHZ. 2008-12-16T02:30:28.51 0.1 undecidable manual Pg 1 0.7168 -0.02 95
IV.MTTG.HHN. 2008-12-16T02:30:28.09 0.3 undecidable manual Pg 59 0.6745 0.282 68
IV.MILZ.HHN. 2008-12-16T02:30:27.09 0.1 undecidable manual Pg 19 0.6466 -0.243 92
IV.GALF.HHN. 2008-12-16T02:30:25.73 0.6 undecidable manual Sg 279 0.3193 -0.728 42
.HVZN.BHN. 2008-12-16T02:30:24.66 0.1 undecidable manual Pg 202 0.5198 -0.511 89
IV.SSY.BHN. 2008-12-16T02:30:24.86 0.1 undecidable manual Pg 170 0.509 -0.121 97
.AGST.EHN. 2008-12-16T02:30:23.70 0.1 undecidable manual Pg 153 0.4533 -0.33 94
I1.HAGA.BHE. 2008-12-16T02:30:23.02 0.1 undecidable manual Pg 158 0.4038 -0.06 100
IV.HCRL.BHN. 2008-12-16T02:30:22.39 0.1 undecidable manual Pg 172 0.3804 -0.17 98
IV.GALF.HHN. 2008-12-16T02:30:21.60 0.1 undecidable manual Pg 279 0.3193 0.384 95
IV.PRMA.HHZ. 2008-12-16T02:30:05.76 10.0 undecidable manual Pg 0 0 0
IV.SGG.HHZ. 2008-12-16T02:30:01.52 10.0 undecidable manual Pg 0 0 0
IV.ORI.EHE. 2008-12-16T02:29:50.24 10.0 undecidable manual Pg 0 0 0
IV.VCEL.EHE. 2008-12-16T02:29:50.06 10.0 undecidable manual Pg 0 0 0
BA.PZUN.HHE. 2008-12-16T02:29:27.21 10.0 undecidable manual Pg 0 0 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.HCRL.BHN. ML:0 0.001015 0.48 AML other m 2008-12-16T02:30:22.39
IV.HCRL.BHE. ML:0 0.00134 0.88 AML other m 2008-12-16T02:30:22.39
IV.SSY.BHN. ML:0 0.002665 0.42 AML other m 2008-12-16T02:30:24.86
IV.SSY.BHE. ML:0 0.001765 0.62 AML other m 2008-12-16T02:30:24.86
IV.MILZ.HHN. ML:0 0.00044 0.88 AML other m 2008-12-16T02:30:27.09
IV.MILZ.HHE. ML:0 0.000355 0.4 AML other m 2008-12-16T02:30:27.09
IV.MSRU.BHN. ML:0 0.00098 0.46 AML other m 2008-12-16T02:30:28.75
IV.MSRU.BHE. ML:0 0.0011 0.52 AML other m 2008-12-16T02:30:28.75
IV.GIB.EHN. ML:0 0.00082 0.8 AML other m 2008-12-16T02:30:30.62
IV.GIB.EHE. ML:0 0.000695 0.48 AML other m 2008-12-16T02:30:30.62
IV.CORL.HHN. ML:3.6 0.00212 0.38 AML other m 2008-12-16T02:30:40.09
IV.CORL.HHE. ML:3.6 0.00196 0.56 AML other m 2008-12-16T02:30:40.09
BA.PZUN.HHE. Md:0 21 END duration s
IV.VCEL.EHE. Md:0 91 END duration s
IV.ORI.EHE. Md:0 16 END duration s
IV.SGG.HHZ. Md:0 11 END duration s
IV.PRMA.HHZ. Md:0 8 END duration s
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