Earthquake with magnitude of ML 3.1 on date 31-07-2007 and time 08:53:16 (Italy) in region 8 km E Castel di Iudica (CT)

A magnitude ML 3.1 earthquake occured in region: 8 km E Castel di Iudica (CT), on

  • 31-07-2007 06:53:16 (UTC)
  • 31-07-2007 08:53:16 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.47, 14.74 at 28 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
Castel di Iudica CT 8 4625 4625
Ramacca CT 10 10894 15519
Catenanuova EN 12 4866 20385
Palagonia CT 16 16608 36993
Centuripe EN 17 5470 42463
Raddusa CT 18 3178 45641
Paternò CT 19 48228 93869

Municipalities with at least 50000 inhabitants

An earthquake occurred to
31 Km W of Catania (314555 inhabitants)
41 Km W of Acireale (52622 inhabitants)
60 Km E of Caltanissetta (63360 inhabitants)
60 Km N of Ragusa (73313 inhabitants)
60 Km N of Vittoria (63339 inhabitants)
62 Km NE of Gela (75827 inhabitants)
67 Km NW of Siracusa (122291 inhabitants)
68 Km N of Modica (54633 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
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
Md 2.9
ML 3.1
2007-07-31
06:53:16
37.47 14.74 28 2014-10-21
12:27:13
Bollettino Sismico Italiano INGV 644529
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2007-07-31 06:53:16 ± 0.09
Latitude 37.47 ± 0.01
Longitude 14.74 ± 0.01
Depth (km) 28 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-SISPICK
Event type earthquake
Origin ID 644529

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 833
Semi-minor axis of confidence ellipse (meter) 709
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 150
Circular confidence region, given by single value of horizontal uncertainty (meter) 1081.7
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 82
Number of associated phases, regardless of their use for origin computation 44
Number of defining phases 44
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.5
Epicentral distance of station closest to the epicenter (degree) 0.1295
Epicentral distance of station farthest from the epicenter (degree) 2.33104
Number of stations at which the event was observed 29
Number of stations from which data was used for origin computation 29
Magnitudes information

ML:3.1

Field Value
Value 3.1
Uncertainty 0.5
Num. used stations
Type of magnitude ML
Reference to an origin 644529
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-05 12:15:13

Md:2.9

Field Value
Value 2.9
Uncertainty 0.2
Num. used stations
Type of magnitude Md
Reference to an origin 644529
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-05 12:15:13
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.CARO.HHZ. 2007-07-31T06:54:16.01 0.1 undecidable manual Sg 33 2.1296 0.067 25
IV.JOPP.HHZ. 2007-07-31T06:53:59.82 0.1 undecidable manual Sg 38 1.4533 0.051 38
MN.TIP.HHZ. 2007-07-31T06:53:54.22 0.1 undecidable manual Pg 42 2.331 0.753 34
IV.SERS.HHN. 2007-07-31T06:53:52.29 0.3 undecidable manual Pg 44 2.1907 0.762 29
I1.IACL.BHZ. 2007-07-31T06:53:51.96 0.1 undecidable manual Sg 344 1.1062 0.494 39
IV.MPAZ.BHZ. 2007-07-31T06:53:51.82 0.6 undecidable manual Sg 64 1.1143 0.158 21
IV.CARO.HHZ. 2007-07-31T06:53:50.30 0.1 undecidable manual Pg 33 2.1296 -0.375 47
IV.SLNA.SHZ. 2007-07-31T06:53:50.71 1.0 undecidable manual Sg 4 1.0972 -0.547 10
IV.MSRU.BHE. 2007-07-31T06:53:49.53 0.1 undecidable manual Sg 37 1.0009 0.872 34
IV.GRI.EHZ. 2007-07-31T06:53:48.47 0.1 undecidable manual Pg 44 1.8922 1.071 42
IV.IVPL.BHE. 2007-07-31T06:53:46.74 0.6 undecidable manual Sg 12 0.9281 0.229 21
IV.PLAC.HHZ. 2007-07-31T06:53:44.73 0.1 positive manual Pg 53 1.661 0.527 61
IV.USI.SHZ. 2007-07-31T06:53:44.83 0.1 positive manual Pg 316 1.7429 -0.511 58
IV.JOPP.HHZ. 2007-07-31T06:53:40.99 0.1 undecidable manual Pg 38 1.4533 -0.348 72
IV.HAVL.BHZ. 2007-07-31T06:53:37.69 0.1 undecidable manual Sg 149 0.5927 0.821 38
IV.MMME.BHZ. 2007-07-31T06:53:37.87 0.1 undecidable manual Sg 41 0.6205 0.228 46
IV.SOI.SHZ. 2007-07-31T06:53:37.67 0.1 positive manual Pg 59 1.2033 -0.215 82
IV.MPAZ.BHZ. 2007-07-31T06:53:36.50 0.1 positive manual Pg 64 1.1143 -0.157 84
IV.SCLL.SHZ. 2007-07-31T06:53:36.15 0.1 undecidable manual Pg 44 1.1017 -0.337 81
IV.SLNA.SHZ. 2007-07-31T06:53:36.01 0.1 undecidable manual Pg 4 1.0972 -0.414 79
IV.ILLI.BHZ. 2007-07-31T06:53:36.13 0.1 undecidable manual Pg 10 0.9911 1.379 54
I1.IACL.BHZ. 2007-07-31T06:53:36.25 0.1 positive manual Pg 344 1.1062 -0.294 81
IV.HMDC.BHZ. 2007-07-31T06:53:35.13 0.1 undecidable manual Sg 176 0.5099 0.595 43
IV.MSRU.BHE. 2007-07-31T06:53:34.48 0.1 undecidable manual Pg 37 1.0009 -0.442 81
IV.MSI.SHZ. 2007-07-31T06:53:34.65 0.6 undecidable manual Pg 41 0.9785 0.107 43
IV.IVPL.BHE. 2007-07-31T06:53:33.35 0.1 undecidable manual Pg 12 0.9281 -0.334 84
IV.MTTG.HHN. 2007-07-31T06:53:33.56 0.1 positive manual Pg 55 0.9299 -0.158 88
IV.SSY.BHZ. 2007-07-31T06:53:32.20 0.1 undecidable manual Sg 139 0.4092 0.412 46
IV.GIB.EHN. 2007-07-31T06:53:31.27 0.1 undecidable manual Pg 313 0.7671 0.275 89
I1.HAGA.BHZ. 2007-07-31T06:53:30.47 0.1 undecidable manual Sg 119 0.3786 -0.504 46
IV.ESLN.BHZ. 2007-07-31T06:53:29.08 0.1 undecidable manual Sg 40 0.2932 0.267 48
IV.HAVL.BHZ. 2007-07-31T06:53:28.04 0.1 negative manual Pg 149 0.5927 -0.077 96
IV.HVZN.BHZ. 2007-07-31T06:53:28.92 0.1 undecidable manual Sg 183 0.2896 0.183 50
IV.MMME.BHZ. 2007-07-31T06:53:28.38 0.1 positive manual Pg 41 0.6205 -0.181 94
IV.HMDC.BHZ. 2007-07-31T06:53:26.61 0.1 negative manual Pg 176 0.5099 -0.159 95
IV.MNO.SHZ. 2007-07-31T06:53:26.53 0.1 negative manual Pg 356 0.4641 0.492 90
IV.SSY.BHZ. 2007-07-31T06:53:25.10 0.1 negative manual Pg 139 0.4092 -0.083 99
IV.ECNV.BHZ. 2007-07-31T06:53:25.67 0.1 undecidable manual Sg 351 0.1295 0.193 51
IV.RAFF.HHZ. 2007-07-31T06:53:25.07 0.1 positive manual Pg 231 0.3858 0.244 97
I1.HAGA.BHZ. 2007-07-31T06:53:24.13 0.1 negative manual Pg 119 0.3786 -0.582 89
IV.ESLN.BHZ. 2007-07-31T06:53:23.27 0.1 positive manual Pg 40 0.2932 -0.195 100
IV.GALF.HHN. 2007-07-31T06:53:23.12 0.1 negative manual Pg 331 0.2779 -0.134 100
IV.HVZN.BHZ. 2007-07-31T06:53:23.23 0.1 negative manual Pg 183 0.2896 -0.19 99
IV.ECNV.BHZ. 2007-07-31T06:53:21.07 0.1 negative manual Pg 351 0.1295 -0.468 96
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ECNV.BHN. ML:3.3 0.011535 0.48 AML other m 2007-07-31T06:53:21.07
IV.ECNV.BHE. ML:3.3 0.009465 0.54 AML other m 2007-07-31T06:53:21.07
IV.HVZN.BHN. ML:3.6 0.013495 0.38 AML other m 2007-07-31T06:53:23.23
IV.HVZN.BHE. ML:3.6 0.013685 0.42 AML other m 2007-07-31T06:53:23.23
IV.ESLN.BHN. ML:3.5 0.009405 0.26 AML other m 2007-07-31T06:53:23.27
IV.ESLN.BHE. ML:3.5 0.0137 0.66 AML other m 2007-07-31T06:53:23.27
I1.HAGA.BHN. ML:3.4 0.005665 0.62 AML other m 2007-07-31T06:53:24.13
I1.HAGA.BHE. ML:3.4 0.006605 0.42 AML other m 2007-07-31T06:53:24.13
IV.RAFF.HHN. ML:3.5 0.00893 0.3 AML other m 2007-07-31T06:53:25.07
IV.RAFF.HHE. ML:3.5 0.00894 0.32 AML other m 2007-07-31T06:53:25.07
IV.SSY.BHN. ML:3.6 0.014695 0.32 AML other m 2007-07-31T06:53:25.10
IV.SSY.BHE. ML:3.6 0.00646 0.38 AML other m 2007-07-31T06:53:25.10
IV.MNO.SHZ. Md:2.9 70 END duration s
IV.HAVL.BHN. ML:3.6 0.005705 0.28 AML other m 2007-07-31T06:53:28.04
IV.HAVL.BHE. ML:3.6 0.00598 0.28 AML other m 2007-07-31T06:53:28.04
IV.MMME.BHN. ML:3.1 0.00216 0.92 AML other m 2007-07-31T06:53:28.38
IV.MMME.BHE. ML:3.1 0.002115 0.46 AML other m 2007-07-31T06:53:28.38
IV.GIB.EHN. Md:3.1 89 END duration s
IV.GIB.EHE. ML:3.1 0.00134 0.36 AML other m 2007-07-31T06:53:31.27
IV.MTTG.HHN. ML:2.7 0.00056 0.62 AML other m 2007-07-31T06:53:33.56
IV.MTTG.HHE. ML:2.7 0.00037 0.6 AML other m 2007-07-31T06:53:33.56
IV.MSRU.BHN. ML:3.3 0.001475 0.72 AML other m 2007-07-31T06:53:34.48
IV.MSRU.BHE. Md:2.9 65.2 END duration s
IV.SLNA.SHZ. Md:3 78.2 END duration s
IV.ILLI.BHN. ML:3.7 0.005445 0.46 AML other m 2007-07-31T06:53:36.13
IV.ILLI.BHE. ML:3.7 0.002965 0.48 AML other m 2007-07-31T06:53:36.13
IV.SCLL.SHZ. ML:0 0.000115 0.72 AML other m 2007-07-31T06:53:36.15
I1.IACL.BHN. ML:3.2 0.00123 0.4 AML other m 2007-07-31T06:53:36.25
I1.IACL.BHE. ML:3.2 0.00096 0.22 AML other m 2007-07-31T06:53:36.25
IV.MPAZ.BHN. ML:2.9 0.00052 0.3 AML other m 2007-07-31T06:53:36.50
IV.MPAZ.BHE. ML:2.9 0.000475 0.36 AML other m 2007-07-31T06:53:36.50
IV.SOI.SHZ. Md:3 77.3 END duration s
IV.JOPP.HHN. ML:2.9 0.00025 0.64 AML other m 2007-07-31T06:53:40.99
IV.JOPP.HHE. ML:2.9 0.000405 0.4 AML other m 2007-07-31T06:53:40.99
IV.PLAC.HHN. ML:2.3 9.0E-5 0.7 AML other m 2007-07-31T06:53:44.73
IV.PLAC.HHE. ML:2.3 6.0E-5 0.52 AML other m 2007-07-31T06:53:44.73
IV.USI.SHZ. ML:0 0.000175 0.2 AML other m 2007-07-31T06:53:44.83
IV.GRI.EHN. ML:2.8 0.00015 0.64 AML other m 2007-07-31T06:53:48.47
IV.GRI.EHE. ML:2.8 0.000155 0.6 AML other m 2007-07-31T06:53:48.47
IV.CARO.HHN. ML:3.2 0.000335 0.54 AML other m 2007-07-31T06:53:50.30
IV.CARO.HHE. ML:3.2 0.000355 0.62 AML other m 2007-07-31T06:53:50.30
IV.SERS.HHN. ML:2.4 5.0E-5 1.22 AML other m 2007-07-31T06:53:52.29
IV.SERS.HHE. ML:2.4 4.5E-5 0.68 AML other m 2007-07-31T06:53:52.29
MN.TIP.HHN. ML:2.4 5.0E-5 0.7 AML other m 2007-07-31T06:53:54.22
MN.TIP.HHE. ML:2.4 4.0E-5 1.1 AML other m 2007-07-31T06:53:54.22
IV.HVZN.BHZ. Md:3 79 END duration s
IV.ESLN.BHZ. Md:2.8 65 END duration s
I1.HAGA.BHZ. Md:2.8 67 END duration s
IV.RAFF.HHZ. Md:2.8 67 END duration s
IV.SSY.BHZ. Md:2.8 69 END duration s
IV.HMDC.BHZ. Md:2.8 61 END duration s
IV.HAVL.BHZ. Md:2.8 61 END duration s
IV.MMME.BHZ. Md:2.8 67 END duration s
IV.IVPL.BHE. Md:2.8 64.3 END duration s
IV.MSI.SHZ. Md:2.3 30.7 END duration s
IV.ILLI.BHZ. Md:2.8 63.1 END duration s
I1.IACL.BHZ. Md:3 76 END duration s
IV.MPAZ.BHZ. Md:3 74 END duration s
IV.JOPP.HHZ. Md:2.7 48.1 END duration s
IV.GRI.EHZ. Md:2.8 47 END duration s
IV.CARO.HHZ. Md:2.9 60.2 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
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QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download