Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 3.0 on date 11-01-2010 and time 23:15:45 (Italy) 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) 37.7390, 15.1490 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.

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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 seismic activity in different time intervals, before the seismic event to which they refer. Data reported in the first two maps come from the analysis carried out in real time by the personnel of the INGV Operating Rooms, immediately after each earthquake. The third map shows data from 1985 to the date of the earthquake: the locations are reviewed by the seismological analysts of the INGV Italian Seismic Bulletin (Bollettino Sismico Italiano dell’INGV). The localization parameters (hypocentral coordinates and magnitude) are the best possible estimate with the data available to the INGV, but are constantly updated according to further data that become available. The location and magnitude parameters, subsequently reviewed by seismological analysts, may vary.

Earthquakes of the 3 days preceding this event

Earthquakes of the 3 days preceding this event

This map shows the earthquake epicenters with magnitude ≥ 0.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, in the 72 hours preceding this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Earthquakes of the 90 days preceding this event

Earthquakes of the 90 days preceding this event

This map shows the earthquake epicenters with magnitude ≥ 2.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, in the 90 days preceding this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Earthquakes from 1985 to the date of the event

Earthquakes from 1985 to the date of the event

This map shows the earthquake epicenters with magnitude ≥ 3.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, from 1985 to the date of this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Earthquakes since 1000 AD until 2019

Earthquakes since 1000 AD until 2019

This map shows the epicenters of the historical earthquakes catalogue CPT15 (Catalogo Parametrico dei Terremoti Italiani, 2015 version 3.0, https://doi.org/10.13127/cpti/cpti15.3) since 1000 AD until 2019. The size of the square indicates the different classes of magnitude. For earthquakes with magnitude ≥ 6.0, it is also shown the year of occurrence and the magnitude value. The black and white star is 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 updated as more data become available. See http://shakemap.ingv.it for additional information. The black star indicates the epicenter. The triangles show the accelerometric and velocimetric stations used in the calculation, colored according to the recorded shaking.

Intensity Shakemap

Intensity Shakemap

This map shows the distribution of instrumental intensities. The intensity is derived through an empirical law that correlates the recorded values of actual ground shaking, e.g., acceleration and velocity, with the macroseismic intensity for Italian earthquakes, as reported in the Italian Macroseismic Database (DBMI15, https://doi.org/10.13127/cpti/cpti15.3).
Peak ground acceleration Shakemap

Peak ground acceleration Shakemap

This map shows the distribution of peak ground acceleration expressed as percent 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
Preliminary map of the earthquake effects from the web questionnaire

Preliminary map of the earthquake effects from the web questionnaire

This map shows the distribution of earthquake resentment in the area, expressed in terms of intensity on the MCS scale (Mercalli-Cancani-Sieberg). Intensities are determined using data from questionnaires collected on the website http://www.hsit.it. The intensities shown are determined considering all the reports received from each municipality, and are all the more reliable the greater the number of questionnaires. The collected data are subjected to an automatic statistical filter, but are not checked individually. In particular, intensities greater than or equal to the VI degree of the MCS or EMS scale require on-site verification by specialized personnel. The black star is the epicenter of the earthquake that occurred. This map is updated every time citizens fill out new questionnaires. The number of questionnaires processed to obtain this map, the date and time of the last update are shown at the top right.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Bulletin
Rev1000 		ML 3.0 2010-01-11
22:15:45		 37.739 15.149 1 2014-10-21
12:27:13		 Bollettino Sismico Italiano INGV 1005209
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2010-01-11 22:15:45 ± 0.18
Latitude 37.7390 ± 0.0063
Longitude 15.1490 ± 0.0091
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

Uncertainty

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) 1063.0
Confidence level of the uncertainty (%) 68

Quality

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) 0.00000
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

ML:3.0

Field Value
Value 3.0
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(km) 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 277 162.615 0.934 27
IV.GRI.EHZ. 2010-01-11T22:16:13.88 0.3 undecidable manual Pg 42 163.4142 0.636 47
IV.HAVL.HHN. 2010-01-11T22:16:13.41 0.1 undecidable manual Sg 182 86.4468 0.312 82
IV.IVPL.HHZ. 2010-01-11T22:16:10.20 0.6 undecidable manual Sg 348 72.2721 0.904 34
IV.PLAC.HHN. 2010-01-11T22:16:09.92 0.3 undecidable manual Pg 55 137.4624 0.677 50
IV.HVZN.HHZ. 2010-01-11T22:16:08.94 0.6 undecidable manual Sg 212 72.9714 -0.551 41
IV.ALJA.HHZ. 2010-01-11T22:16:08.23 0.1 undecidable manual Pg 271 122.3886 1.296 51
IV.SSY.HHZ. 2010-01-11T22:16:07.42 0.3 undecidable manual Sg 186 64.7907 0.111 67
IV.MSRU.HHZ. 2010-01-11T22:16:07.07 0.6 undecidable manual Sg 28 66.1893 -0.61 40
IV.MTTG.HHZ. 2010-01-11T22:16:05.69 0.3 undecidable manual Sg 59 56.499 0.685 60
IV.AGST.EHN. 2010-01-11T22:16:04.49 0.1 undecidable manual Sg 173 53.9016 0.364 88
IV.GIB.HHZ. 2010-01-11T22:16:04.25 0.6 undecidable manual Pg 286 102.2199 0.429 39
IV.IACL.HHZ. 2010-01-11T22:16:04.18 0.1 undecidable manual Pg 322 112.0989 -1.161 57
IV.PLLN.SHZ. 2010-01-11T22:16:03.10 0.1 undecidable manual Pg 288 92.4408 0.781 70
IV.HCRL.HHZ. 2010-01-11T22:16:03.44 0.3 undecidable manual Sg 192 51.6039 0.128 70
IV.CSLB.SHZ. 2010-01-11T22:16:03.11 0.3 undecidable manual Pg 283 98.124 -0.077 64
IV.GALF.HHZ. 2010-01-11T22:16:02.99 0.6 undecidable manual Sg 267 51.2154 -0.19 45
IV.SOI.EHZ. 2010-01-11T22:16:01.31 0.1 undecidable manual Pg 65 87.4458 -0.238 84
MN.CEL.HHZ. 2010-01-11T22:16:01.18 0.1 undecidable manual Pg 48 87.1461 -0.312 83
IV.RAFF.HHZ. 2010-01-11T22:16:01.46 0.3 undecidable manual Pg 231 89.8434 -0.455 60
IV.HAVL.HHN. 2010-01-11T22:16:00.97 0.1 undecidable manual Pg 182 86.4468 -0.424 81
IV.MPAZ.HHZ. 2010-01-11T22:16:00.87 0.1 undecidable manual Pg 72 78.7656 0.656 76
IV.ILLI.HHZ. 2010-01-11T22:16:00.66 0.3 undecidable manual Pg 347 80.364 0.205 64
IV.ECNV.HHZ. 2010-01-11T22:15:59.68 0.6 undecidable manual Sg 248 41.5251 -0.132 47
IV.HVZN.HHZ. 2010-01-11T22:15:58.22 0.3 undecidable manual Pg 212 72.9714 -1.092 48
IV.IVPL.HHZ. 2010-01-11T22:15:58.33 0.1 undecidable manual Pg 348 72.2721 -0.873 70
IV.MSRU.HHZ. 2010-01-11T22:15:57.88 0.1 undecidable manual Pg 28 66.1893 -0.384 85
IV.SSY.HHZ. 2010-01-11T22:15:57.72 0.1 undecidable manual Pg 186 64.7907 -0.334 87
IV.AGST.EHN. 2010-01-11T22:15:56.10 0.1 undecidable manual Pg 173 53.9016 -0.114 91
IV.MTTG.HHZ. 2010-01-11T22:15:56.52 0.1 undecidable manual Pg 59 56.499 -0.197 89
IV.GALF.HHZ. 2010-01-11T22:15:55.57 0.1 undecidable manual Pg 267 51.2154 -0.099 92
IV.HCRL.HHZ. 2010-01-11T22:15:55.48 0.1 undecidable manual Pg 192 51.6039 -0.267 89
IV.ECNV.HHZ. 2010-01-11T22:15:54.51 0.3 undecidable manual Pg 248 41.5251 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 16.1727 0.086 75
IV.ESLN.HHZ. 2010-01-11T22:15:48.64 0.1 undecidable manual Pg 252 16.1727 -0.009 100
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Fault Plane solutions

Fault Plane solutions

The map reports the fault plane solutions for earthquakes in the region from 1977 to the date of this event. Red moment tensors are determined using the Regional Centroid Moment Tensor technique (RCMT, http://www.bo.ingv.it/RCMT) applied for earthquakes with magnitude larger than 4.5 in the Euro-Mediterranenan area. Occasionally, when a station azimuthal coverage exists RCMTs can be obtained also for earthquakes with magnitude down to 4.0. The gray moment tensors are obtained with the Time Domain Moment Tensor method (TDMT, /tdmt). This technique is applied to earthquakes with magnitude ML greater than 3.2, when it is possible. The size of symbols 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 miniseed + resp format Download