Earthquake with magnitude of ML 3.0 on date 11-01-2010 and time 22:15:45 (UTC) in region 1 km SE Sant'Alfio (CT)

A magnitude ML 3.0 earthquake occured in region: 1 km SE Sant'Alfio (CT), on

  • 11-01-2010 22:15:45 (UTC)
  • 11-01-2010 23:15:45 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 37.74, 15.15 at 1 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
Sant'Alfio CT 1 1582 1582
Giarre CT 3 27659 29241
Milo CT 3 1087 30328
Mascali CT 5 14282 44610
Riposto CT 5 14838 59448
Santa Venerina CT 6 8592 68040
Zafferana Etnea CT 6 9517 77557
Fiumefreddo di Sicilia CT 8 9623 87180
Piedimonte Etneo CT 8 3963 91143
Linguaglossa CT 11 5403 96546
Calatabiano CT 12 5308 101854
Acireale CT 14 52622 154476
Aci Sant'Antonio CT 15 17984 172460
Trecastagni CT 15 10910 183370
Viagrande CT 15 8563 191933
Aci Catena CT 15 29851 221784
Gaggi ME 15 3184 224968
Pedara CT 16 14102 239070
Aci Bonaccorsi CT 16 3524 242594
Giardini-Naxos ME 16 9415 252009
Castiglione di Sicilia CT 16 3215 255224
Taormina ME 17 10960 266184
Nicolosi CT 17 7463 273647
Castelmola ME 18 1088 274735
Motta Camastra ME 18 845 275580
Valverde CT 18 7840 283420
Francavilla di Sicilia ME 18 3945 287365
Graniti ME 18 1492 288857
San Giovanni la Punta CT 19 23060 311917
Tremestieri Etneo CT 19 20589 332506
San Gregorio di Catania CT 20 11966 344472
Moio Alcantara ME 20 717 345189

Municipalities with at least 50000 inhabitants

An earthquake occurred to
14 Km N of Acireale (52622 inhabitants)
27 Km N of Catania (314555 inhabitants)
60 Km SW of Reggio di Calabria (183035 inhabitants)
62 Km SW of Messina (238439 inhabitants)
77 Km N of Siracusa (122291 inhabitants)
98 Km NE of Ragusa (73313 inhabitants)
100 Km E 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.
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 ( 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.

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 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 ( 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 3.0 2010-01-11
37.74 15.15 1 2014-10-21
Bollettino Sismico Italiano INGV 1005209
Preferred location and magnitude until now.
Origin information


Field Value
Time (UTC) 2010-01-11 22:15:45 ± 0.18
Latitude 37.74 ± 0.01
Longitude 15.15 ± 0.01
Depth (km) 1 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-SISPICK
Event type earthquake
Origin ID 1005209


Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 753
Semi-minor axis of confidence ellipse (meter) 505
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 128
Circular confidence region, given by single value of horizontal uncertainty (meter) 1063
Confidence level of the uncertainty (%) 68


Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 101
Number of associated phases, regardless of their use for origin computation 38
Number of defining phases 35
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.62
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 1.47219
Number of stations at which the event was observed 27
Number of stations from which data was used for origin computation 24
Magnitude information


Field Value
Value 3
Uncertainty 0.2
Num. used stations
Type of magnitude ML
Reference to an origin 1005209
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-05 19:16:16
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.SERS.HHN. 2010-01-11T22:16:22.60 10.0 undecidable manual Pg 0 0 0
IV.CRJA.SHZ. 2010-01-11T22:16:19.26 10.0 undecidable manual Pg 0 0 0
IV.CORL.HHZ. 2010-01-11T22:16:14.06 0.6 undecidable manual Pg 277 1.465 0.934 27
IV.GRI.EHZ. 2010-01-11T22:16:13.88 0.3 undecidable manual Pg 42 1.4722 0.636 47
IV.HAVL.HHN. 2010-01-11T22:16:13.41 0.1 undecidable manual Sg 182 0.7788 0.312 82
IV.IVPL.HHZ. 2010-01-11T22:16:10.20 0.6 undecidable manual Sg 348 0.6511 0.904 34
IV.PLAC.HHN. 2010-01-11T22:16:09.92 0.3 undecidable manual Pg 55 1.2384 0.677 50
IV.HVZN.HHZ. 2010-01-11T22:16:08.94 0.6 undecidable manual Sg 212 0.6574 -0.551 41
IV.ALJA.HHZ. 2010-01-11T22:16:08.23 0.1 undecidable manual Pg 271 1.1026 1.296 51
IV.SSY.HHZ. 2010-01-11T22:16:07.42 0.3 undecidable manual Sg 186 0.5837 0.111 67
IV.MSRU.HHZ. 2010-01-11T22:16:07.07 0.6 undecidable manual Sg 28 0.5963 -0.61 40
IV.MTTG.HHZ. 2010-01-11T22:16:05.69 0.3 undecidable manual Sg 59 0.509 0.685 60
IV.AGST.EHN. 2010-01-11T22:16:04.49 0.1 undecidable manual Sg 173 0.4856 0.364 88
IV.GIB.HHZ. 2010-01-11T22:16:04.25 0.6 undecidable manual Pg 286 0.9209 0.429 39
IV.IACL.HHZ. 2010-01-11T22:16:04.18 0.1 undecidable manual Pg 322 1.0099 -1.161 57
IV.PLLN.SHZ. 2010-01-11T22:16:03.10 0.1 undecidable manual Pg 288 0.8328 0.781 70
IV.HCRL.HHZ. 2010-01-11T22:16:03.44 0.3 undecidable manual Sg 192 0.4649 0.128 70
IV.CSLB.SHZ. 2010-01-11T22:16:03.11 0.3 undecidable manual Pg 283 0.884 -0.077 64
IV.GALF.HHZ. 2010-01-11T22:16:02.99 0.6 undecidable manual Sg 267 0.4614 -0.19 45
IV.SOI.EHZ. 2010-01-11T22:16:01.31 0.1 undecidable manual Pg 65 0.7878 -0.238 84
MN.CEL.HHZ. 2010-01-11T22:16:01.18 0.1 undecidable manual Pg 48 0.7851 -0.312 83
IV.RAFF.HHZ. 2010-01-11T22:16:01.46 0.3 undecidable manual Pg 231 0.8094 -0.455 60
IV.HAVL.HHN. 2010-01-11T22:16:00.97 0.1 undecidable manual Pg 182 0.7788 -0.424 81
IV.MPAZ.HHZ. 2010-01-11T22:16:00.87 0.1 undecidable manual Pg 72 0.7096 0.656 76
IV.ILLI.HHZ. 2010-01-11T22:16:00.66 0.3 undecidable manual Pg 347 0.724 0.205 64
IV.ECNV.HHZ. 2010-01-11T22:15:59.68 0.6 undecidable manual Sg 248 0.3741 -0.132 47
IV.HVZN.HHZ. 2010-01-11T22:15:58.22 0.3 undecidable manual Pg 212 0.6574 -1.092 48
IV.IVPL.HHZ. 2010-01-11T22:15:58.33 0.1 undecidable manual Pg 348 0.6511 -0.873 70
IV.MSRU.HHZ. 2010-01-11T22:15:57.88 0.1 undecidable manual Pg 28 0.5963 -0.384 85
IV.SSY.HHZ. 2010-01-11T22:15:57.72 0.1 undecidable manual Pg 186 0.5837 -0.334 87
IV.AGST.EHN. 2010-01-11T22:15:56.10 0.1 undecidable manual Pg 173 0.4856 -0.114 91
IV.MTTG.HHZ. 2010-01-11T22:15:56.52 0.1 undecidable manual Pg 59 0.509 -0.197 89
IV.GALF.HHZ. 2010-01-11T22:15:55.57 0.1 undecidable manual Pg 267 0.4614 -0.099 92
IV.HCRL.HHZ. 2010-01-11T22:15:55.48 0.1 undecidable manual Pg 192 0.4649 -0.267 89
IV.ECNV.HHZ. 2010-01-11T22:15:54.51 0.3 undecidable manual Pg 248 0.3741 0.784 59
IV.STR3.BHE. 2010-01-11T22:15:53.59 10.0 undecidable manual Pg 0 0 0
IV.ESLN.HHZ. 2010-01-11T22:15:51.11 0.3 undecidable manual Sg 252 0.1457 0.086 75
IV.ESLN.HHZ. 2010-01-11T22:15:48.64 0.1 undecidable manual Pg 252 0.1457 -0.009 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ESLN.HHN. ML:3.2 0.018 0.61 AML other m 2010-01-11T22:15:48.64
IV.ESLN.HHE. ML:3.2 0.018 0.61 AML other m 2010-01-11T22:15:48.64
IV.ECNV.HHN. ML:2.9 0.00249 0.74 AML other m 2010-01-11T22:15:54.51
IV.ECNV.HHE. ML:2.9 0.0024 0.62 AML other m 2010-01-11T22:15:54.51
IV.GALF.HHE. ML:3.1 0.003565 0.72 AML other m 2010-01-11T22:15:55.57
IV.AGST.EHN. ML:3 0.002475 0.32 AML other m 2010-01-11T22:15:56.10
IV.AGST.EHE. ML:3 0.00193 0.8 AML other m 2010-01-11T22:15:56.10
IV.MTTG.HHN. ML:2.7 0.001095 0.6 AML other m 2010-01-11T22:15:56.52
IV.MTTG.HHE. ML:2.7 0.00122 0.64 AML other m 2010-01-11T22:15:56.52
IV.SSY.HHN. ML:3.2 0.003735 0.44 AML other m 2010-01-11T22:15:57.72
IV.SSY.HHE. ML:3.2 0.00164 0.6 AML other m 2010-01-11T22:15:57.72
IV.MSRU.HHN. ML:2.9 0.001235 0.46 AML other m 2010-01-11T22:15:57.88
IV.MSRU.HHE. ML:2.9 0.00151 0.38 AML other m 2010-01-11T22:15:57.88
IV.HVZN.HHN. ML:2.9 0.00121 0.6 AML other m 2010-01-11T22:15:58.22
IV.HVZN.HHE. ML:2.9 0.00116 0.48 AML other m 2010-01-11T22:15:58.22
IV.IVPL.HHN. ML:3.3 0.002825 0.46 AML other m 2010-01-11T22:15:58.33
IV.IVPL.HHE. ML:3.3 0.00301 0.44 AML other m 2010-01-11T22:15:58.33
IV.ILLI.HHN. ML:3.3 0.00348 0.74 AML other m 2010-01-11T22:16:00.66
IV.ILLI.HHE. ML:3.3 0.00253 0.7 AML other m 2010-01-11T22:16:00.66
IV.HAVL.HHN. ML:3.2 0.0025 0.28 AML other m 2010-01-11T22:16:00.97
IV.HAVL.HHE. ML:3.2 0.00148 0.32 AML other m 2010-01-11T22:16:00.97
MN.CEL.HHN. ML:2.8 0.000965 0.96 AML other m 2010-01-11T22:16:01.18
MN.CEL.HHE. ML:2.8 0.00065 1.4 AML other m 2010-01-11T22:16:01.18
IV.SOI.EHN. ML:2.6 0.000585 0.6 AML other m 2010-01-11T22:16:01.31
IV.SOI.EHE. ML:2.6 0.000345 0.56 AML other m 2010-01-11T22:16:01.31
IV.PLLN.SHZ. ML:0 0.00096 0.68 AML other m 2010-01-11T22:16:03.10
IV.CSLB.SHZ. ML:0 0.000165 0.64 AML other m 2010-01-11T22:16:03.11
IV.IACL.HHN. ML:3 0.000935 0.44 AML other m 2010-01-11T22:16:04.18
IV.IACL.HHE. ML:3 0.000875 0.58 AML other m 2010-01-11T22:16:04.18
IV.GIB.HHN. ML:3.1 0.001255 0.64 AML other m 2010-01-11T22:16:04.25
IV.GIB.HHE. ML:3.1 0.00143 0.62 AML other m 2010-01-11T22:16:04.25
IV.ALJA.HHN. ML:2.8 0.00048 1.42 AML other m 2010-01-11T22:16:08.23
IV.ALJA.HHE. ML:2.8 0.000555 0.84 AML other m 2010-01-11T22:16:08.23
IV.PLAC.HHN. ML:2.8 0.000455 0.72 AML other m 2010-01-11T22:16:09.92
IV.PLAC.HHE. ML:2.8 0.00038 0.62 AML other m 2010-01-11T22:16:09.92
IV.GRI.EHN. ML:2.8 0.00025 0.8 AML other m 2010-01-11T22:16:13.88
IV.GRI.EHE. ML:2.8 0.000335 0.52 AML other m 2010-01-11T22:16:13.88
IV.CORL.HHN. ML:2.9 0.00033 0.76 AML other m 2010-01-11T22:16:14.06
IV.CORL.HHE. ML:2.9 0.000375 0.78 AML other m 2010-01-11T22:16:14.06
IV.CRJA.SHZ. ML:0 0.000285 0.72 AML other m 2010-01-11T22:16:19.26
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, 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, This technique is used for M ≥ 3.5. The size of the beach ball sysmbol scales with the calculated moment magnitude, Mw.
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