Earthquake with magnitude of ML 3.9 on date 10-07-2011 and time 05:07:03 (Italy) in region Costa Siracusana (Siracusa)

A magnitude ML 3.9 earthquake occured in region: Costa Siracusana (Siracusa), on

  • 10-07-2011 03:07:03 (UTC)
  • 10-07-2011 05:07:03 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 36.6700, 15.6460 at 16 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

No Italian municipalities within 20 km distance.

Municipalities with at least 50000 inhabitants

An earthquake occurred to
54 Km SE of Siracusa (122291 inhabitants)
82 Km E of Modica (54633 inhabitants)
86 Km E of Ragusa (73313 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 3.9 2011-07-10
03:07:03
36.67 15.646 16 2014-10-21
12:27:13
Bollettino Sismico Italiano INGV 1254899
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2011-07-10 03:07:03 ± 0.15
Latitude 36.6700 ± 0.0072
Longitude 15.6460 ± 0.0090
Depth (km) 16 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-SISPICK
Event type earthquake
Origin ID 1254899

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 745
Semi-minor axis of confidence ellipse (meter) 589
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 166
Circular confidence region, given by single value of horizontal uncertainty (meter) 1131.4
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 209
Number of associated phases, regardless of their use for origin computation 100
Number of defining phases 55
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.44
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 3.51365
Number of stations at which the event was observed 82
Number of stations from which data was used for origin computation 47
Magnitude information

ML:3.9

Field Value
Value 3.9
Uncertainty 0.4
Num. used stations
Type of magnitude ML
Reference to an origin 1254899
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-06 00:43:26
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.FIR.HHN. 2011-07-10T03:08:48.41 10.0 undecidable manual Pn 0 0 0
MN.VSL.BHZ. 2011-07-10T03:08:33.15 10.0 undecidable manual Sn 0 0 0
IV.CGL.SHE. 2011-07-10T03:08:30.15 10.0 undecidable manual Pn 0 0 0
MN.TIR.HHZ. 2011-07-10T03:08:27.65 10.0 undecidable manual Pn 0 0 0
MN.VSL.BHZ. 2011-07-10T03:08:27.45 10.0 undecidable manual Pn 0 0 0
IV.MMN.HHZ. 2011-07-10T03:08:25.62 10.0 undecidable manual Sn 0 0 0
IV.MSAG.HHN. 2011-07-10T03:08:23.95 10.0 undecidable manual Pn 0 0 0
IV.ATCC.EHN. 2011-07-10T03:08:16.96 10.0 undecidable manual Pn 0 0 0
IV.MCRV.HHN. 2011-07-10T03:08:12.14 10.0 undecidable manual Pn 0 0 0
GE.MATE.HHN. 2011-07-10T03:08:12.71 10.0 undecidable manual Sn 0 0 0
IV.MRLC.HHZ. 2011-07-10T03:08:11.89 10.0 undecidable manual Sn 0 0 0
IV.CDRU.HHN. 2011-07-10T03:08:11.81 10.0 undecidable manual Sn 0 0 0
IV.MRVN.HHN. 2011-07-10T03:08:10.93 10.0 undecidable manual Pn 0 0 0
IV.MESG.HHZ. 2011-07-10T03:08:09.22 10.0 undecidable manual Pn 0 0 0
IV.ACER.HHE. 2011-07-10T03:08:09.02 10.0 undecidable manual Sn 0 0 0
BA.PZUN.HHZ. 2011-07-10T03:08:09.77 10.0 undecidable manual Pn 0 0 0
IV.AMUR.HHN. 2011-07-10T03:08:07.78 10.0 undecidable manual Pn 0 0 0
IV.NOCI.HHZ. 2011-07-10T03:08:07.23 10.0 undecidable manual Pn 0 0 0
MN.CUC.HHE. 2011-07-10T03:08:06.01 10.0 undecidable manual Sn 0 0 0
IV.ORI.HHZ. 2011-07-10T03:08:05.75 10.0 undecidable manual Sn 0 0 0
IV.CMPR.HHN. 2011-07-10T03:08:05.90 10.0 undecidable manual Pn 0 0 0
GE.MATE.HHN. 2011-07-10T03:08:05.55 10.0 undecidable manual Pn 0 0 0
IV.MCEL.HHE. 2011-07-10T03:08:05.88 10.0 undecidable manual Pn 0 0 0
IV.VULT.HHZ. 2011-07-10T03:08:05.32 10.0 undecidable manual Pn 0 0 0
IV.ACER.HHE. 2011-07-10T03:08:04.84 10.0 undecidable manual Pn 0 0 0
IV.MRLC.HHZ. 2011-07-10T03:08:04.13 10.0 undecidable manual Pn 0 0 0
IV.LTRZ.EHN. 2011-07-10T03:08:04.67 10.0 undecidable manual Pn 0 0 0
IV.CRAC.EHN. 2011-07-10T03:08:03.19 10.0 undecidable manual Pn 0 0 0
MN.CUC.HHE. 2011-07-10T03:08:01.55 10.0 undecidable manual Pn 0 0 0
IV.CDRU.HHN. 2011-07-10T03:08:00.36 10.0 undecidable manual Pn 0 0 0
IV.MMN.HHZ. 2011-07-10T03:08:00.20 10.0 undecidable manual Pn 0 0 0
IV.ORI.HHZ. 2011-07-10T03:08:00.92 10.0 undecidable manual Pn 0 0 0
IV.SCHR.EHZ. 2011-07-10T03:08:00.26 10.0 undecidable manual Pn 0 0 0
IV.SIRI.HHZ. 2011-07-10T03:07:58.18 0.3 undecidable manual Pg 3 390.0207 -0.344 19
IV.BULG.HHE. 2011-07-10T03:07:56.85 0.6 undecidable manual Pg 357 378.732 -0.27 13
IV.SALB.HHZ. 2011-07-10T03:07:55.71 0.6 undecidable manual Pg 10 360.9609 0.808 11
IV.PIPA.HHE. 2011-07-10T03:07:51.28 0.3 positive manual Pg 18 328.5267 0.408 20
IV.PTMD.HHE. 2011-07-10T03:07:49.52 0.6 undecidable manual Pg 273 324.9303 -0.907 11
MN.TIP.HHZ. 2011-07-10T03:07:47.07 0.3 positive manual Pg 19 294.8826 0.389 21
IV.SERS.HHZ. 2011-07-10T03:07:45.24 0.3 positive manual Pg 19 277.9107 0.676 24
IV.CAR1.HHZ. 2011-07-10T03:07:45.74 0.3 undecidable manual Pg 10 290.7867 -0.432 22
IV.MFNL.SHZ. 2011-07-10T03:07:44.59 10.0 undecidable manual Pn 0 0 0
IV.MTGR.SHZ. 2011-07-10T03:07:44.95 10.0 undecidable manual Pn 0 0 0
MN.CLTB.HHE. 2011-07-10T03:07:43.88 10.0 undecidable manual Pn 0 0 0
IV.CRJA.SHZ. 2011-07-10T03:07:42.40 10.0 undecidable manual Pg 0 0 0
IV.MCT.BHN. 2011-07-10T03:07:42.61 10.0 undecidable manual Sg 0 0 0
IV.MPG.SHZ. 2011-07-10T03:07:42.58 0.3 undecidable manual Pg 310 260.6391 0.162 32
MN.WDD.HHZ. 2011-07-10T03:07:42.70 0.6 undecidable manual Sg 228 136.4634 0.02 44
IV.RAFF.HHZ. 2011-07-10T03:07:41.02 0.6 undecidable manual Sg 299 129.1707 0.258 44
IV.MMGO.SHZ. 2011-07-10T03:07:41.06 10.0 undecidable manual Pg 0 0 0
IV.GRI.EHZ. 2011-07-10T03:07:41.58 10.0 undecidable manual Pg 0 0 0
IV.LAV9.HHZ. 2011-07-10T03:07:41.47 10.0 undecidable manual Pg 0 0 0
IV.SOLUN.HHZ. 2011-07-10T03:07:40.46 0.3 negative manual Pg 311 244.0668 0.104 37
IV.IACL.HHZ. 2011-07-10T03:07:38.62 0.3 negative manual Pg 332 235.6863 -0.698 34
IV.IFIL.EHZ. 2011-07-10T03:07:38.00 0.1 negative manual Pg 336 230.1918 -0.629 48
IV.MCT.BHN. 2011-07-10T03:07:37.22 10.0 undecidable manual Pg 0 0 0
IV.ALJA.HHZ. 2011-07-10T03:07:36.25 0.3 undecidable manual Pg 306 205.5387 0.683 41
IV.JOPP.HHZ. 2011-07-10T03:07:36.73 0.3 undecidable manual Pg 6 215.8173 -0.116 45
IV.ILLI.HHZ. 2011-07-10T03:07:36.20 0.6 undecidable manual Pg 343 206.238 0.546 29
IV.PLAC.HHN. 2011-07-10T03:07:36.36 0.3 undecidable manual Pg 19 209.3349 0.329 45
IV.GIB.HHN. 2011-07-10T03:07:35.91 0.1 negative manual Pg 316 204.5397 0.468 60
IV.PLLN.SHZ. 2011-07-10T03:07:35.13 0.1 negative manual Pg 318 197.6577 0.543 61
IV.IVPL.HHZ. 2011-07-10T03:07:34.97 0.1 negative manual Pg 343 198.0573 0.333 64
IV.FAVR.HHZ. 2011-07-10T03:07:33.31 0.3 undecidable manual Pg 291 187.4679 -0.004 55
IV.HVZN.HHZ. 2011-07-10T03:07:33.08 0.6 undecidable manual Sg 305 99.9222 0.134 48
IV.RESU.HHE. 2011-07-10T03:07:32.83 0.3 undecidable manual Pg 308 177.3891 0.77 47
IV.MILZ.HHZ. 2011-07-10T03:07:32.42 0.3 undecidable manual Pg 349 181.2852 -0.128 55
MN.CEL.HHZ. 2011-07-10T03:07:31.57 0.3 undecidable manual Pg 7 177.6888 -0.532 51
IV.MSFR.HHZ. 2011-07-10T03:07:31.82 0.3 undecidable manual Pg 329 177.489 -0.259 55
IV.MSCL.HHZ. 2011-07-10T03:07:31.09 0.6 undecidable manual Pg 4 173.6928 -0.512 35
IV.MSRU.HHN. 2011-07-10T03:07:31.67 0.3 undecidable manual Pg 356 177.1893 -0.365 54
IV.MUCR.HHZ. 2011-07-10T03:07:30.34 0.3 undecidable manual Pg 336 166.8108 -0.401 56
IV.MNO.SHZ. 2011-07-10T03:07:30.28 0.3 undecidable manual Pg 329 163.1145 0.001 62
IV.MPNC.HHZ. 2011-07-10T03:07:30.58 0.3 undecidable manual Pg 351 165.8118 -0.035 61
IV.SOI.EHZ. 2011-07-10T03:07:29.23 0.3 positive manual Pg 13 159.7179 -0.605 55
IV.HCRL.HHN. 2011-07-10T03:07:29.38 0.6 undecidable manual Sg 322 87.0462 -0.134 49
IV.NOV.HHZ. 2011-07-10T03:07:29.07 0.3 undecidable manual Pg 344 157.1205 -0.364 59
IV.MCSR.HHZ. 2011-07-10T03:07:29.45 0.3 undecidable manual Pg 347 158.9187 -0.264 60
IV.GALF.HHZ. 2011-07-10T03:07:28.47 0.1 negative manual Pg 321 149.739 0.178 85
IV.CAGR.HHZ. 2011-07-10T03:07:28.26 0.1 negative manual Pg 317 146.3424 0.49 80
IV.HMDC.HHZ. 2011-07-10T03:07:27.47 0.3 undecidable manual Sg 293 83.0502 -0.982 56
IV.MMME.HHZ. 2011-07-10T03:07:27.18 0.3 undecidable manual Pg 346 144.5442 -0.31 63
IV.HAGA.HHN. 2011-07-10T03:07:27.76 0.6 undecidable manual Sg 328 80.8635 -0.115 49
IV.MEU.SHN. 2011-07-10T03:07:27.45 10.0 undecidable manual Sg 0 0 0
IV.MPAZ.HHZ. 2011-07-10T03:07:27.53 0.1 positive manual Pg 13 145.8429 -0.161 86
IV.ECNV.HHZ. 2011-07-10T03:07:26.04 0.1 negative manual Pg 321 131.6682 0.521 81
MN.WDD.HHZ. 2011-07-10T03:07:25.72 0.1 positive manual Pg 228 136.4634 -0.524 82
IV.RAFF.HHZ. 2011-07-10T03:07:25.24 0.1 negative manual Pg 299 129.1707 0.105 90
IV.ESLN.HHZ. 2011-07-10T03:07:25.27 0.6 undecidable manual Pg 333 128.0718 0.312 43
IV.SSY.HHZ. 2011-07-10T03:07:25.95 0.3 undecidable manual Sg 317 74.1702 -0.133 75
IV.MEU.SHN. 2011-07-10T03:07:22.45 10.0 undecidable manual Pg 0 0 0
IV.HAVL.HHZ. 2011-07-10T03:07:21.15 0.3 undecidable manual Sg 305 56.499 -0.245 76
IV.HVZN.HHZ. 2011-07-10T03:07:20.38 0.1 negative manual Pg 305 99.9222 -0.243 93
IV.HLNI.HHZ. 2011-07-10T03:07:20.80 0.1 negative manual Pg 318 101.7204 -0.11 95
IV.HCRL.HHN. 2011-07-10T03:07:18.94 0.1 negative manual Pg 322 87.0462 0.299 94
IV.HAGA.HHN. 2011-07-10T03:07:18.04 0.1 undecidable manual Pg 328 80.8635 0.345 94
IV.SSY.HHZ. 2011-07-10T03:07:17.07 0.1 negative manual Pg 317 74.1702 0.41 94
IV.HMDC.HHZ. 2011-07-10T03:07:17.79 0.1 negative manual Pg 293 83.0502 -0.238 96
IV.HAVL.HHZ. 2011-07-10T03:07:14.23 0.1 negative manual Pg 305 56.499 0.276 100
IV.STR3.BHE. 2011-07-10T03:07:01.59 10.0 undecidable manual Pg 0 0 0
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