Earthquake with magnitude of ML 3.5 on date 07-02-2009 and time 09:02:35 (Italy) in region 4 km SE Valledolmo (PA)

A magnitude ML 3.5 earthquake occured in region: 4 km SE Valledolmo (PA), on

  • 07-02-2009 08:02:35 (UTC)
  • 07-02-2009 09:02:35 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 37.7230, 13.8600 at 7 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
Valledolmo PA 4 3594 3594
Vallelunga Pratameno CL 5 3461 7055
Villalba CL 8 1633 8688
Sclafani Bagni PA 11 426 9114
Caltavuturo PA 11 4017 13131
Alia PA 14 3623 16754
Marianopoli CL 15 1906 18660
Scillato PA 16 613 19273
Resuttano CL 16 2038 21311
Polizzi Generosa PA 16 3407 24718
Montemaggiore Belsito PA 16 3365 28083
Aliminusa PA 17 1236 29319
Castellana Sicula PA 18 3411 32730
Mussomeli CL 18 10780 43510
Blufi PA 19 1029 44539

Municipalities with at least 50000 inhabitants

An earthquake occurred to
31 Km NW of Caltanissetta (63360 inhabitants)
50 Km SE of Bagheria (55387 inhabitants)
52 Km NE of Agrigento (59770 inhabitants)
62 Km SE of Palermo (674435 inhabitants)
81 Km NW of Gela (75827 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 3.5 2009-02-07
08:02:35
37.723 13.86 7 2014-10-21
12:27:13
Bollettino Sismico Italiano INGV 742689
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2009-02-07 08:02:35 ± 0.15
Latitude 37.7230 ± 0.0099
Longitude 13.8600 ± 0.0102
Depth (km) 7 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-SISPICK
Event type earthquake
Origin ID 742689

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1219
Semi-minor axis of confidence ellipse (meter) 423
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 29
Circular confidence region, given by single value of horizontal uncertainty (meter) 1421.3
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 147
Number of associated phases, regardless of their use for origin computation 47
Number of defining phases 35
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.79
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 2.69527
Number of stations at which the event was observed 36
Number of stations from which data was used for origin computation 26
Magnitude information

ML:3.5

Field Value
Value 3.5
Uncertainty 0.3
Num. used stations
Type of magnitude ML
Reference to an origin 742689
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-05 14:02:45
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CRAC.EHZ. 2009-02-07T08:03:32.77 10.0 undecidable manual Pg 0 0 0
IV.ORI.EHZ. 2009-02-07T08:03:30.13 10.0 undecidable manual Pg 0 0 0
IV.PIPA.HHZ. 2009-02-07T08:03:26.36 10.0 undecidable manual Pg 0 0 0
IV.SIRI.HHE. 2009-02-07T08:03:25.38 10.0 undecidable manual Pg 0 0 0
IV.GRI.SHZ. 2009-02-07T08:03:20.62 10.0 undecidable manual Sg 0 0 0
MN.TIP.HHN. 2009-02-07T08:03:19.85 0.1 undecidable manual Pn 56 299.1783 0.023 26
IV.GRI.SHZ. 2009-02-07T08:03:16.12 10.0 undecidable manual Pg 0 0 0
IV.CARO.HHZ. 2009-02-07T08:03:15.02 0.1 undecidable manual Pn 50 266.1336 -0.692 32
IV.PLAC.HHE. 2009-02-07T08:03:12.18 0.1 undecidable manual Pn 69 239.1828 -0.172 46
IV.AGST.EHE. 2009-02-07T08:03:12.59 0.1 undecidable manual Sg 113 130.9689 -1.086 58
I1.HAGA.BHZ. 2009-02-07T08:03:11.73 0.3 undecidable manual Sg 113 123.8871 -0.05 62
IV.HMDC.BHZ. 2009-02-07T08:03:10.28 0.3 undecidable manual Sg 136 117.4935 0.205 61
IV.FAVR.SHZ. 2009-02-07T08:03:10.01 10.0 undecidable manual Pg 0 0 0
IV.HCRL.BHE. 2009-02-07T08:03:10.44 0.1 undecidable manual Sg 115 114.0969 1.262 55
IV.MTTG.HHE. 2009-02-07T08:03:08.40 10.0 undecidable manual Sg 0 0 0
IV.SOI.EHZ. 2009-02-07T08:03:07.81 0.1 undecidable manual Pn 78 195.9594 0.827 50
IV.MPAZ.BHE. 2009-02-07T08:03:07.61 10.0 undecidable manual Pg 0 0 0
IV.MTTG.HHE. 2009-02-07T08:03:05.21 10.0 undecidable manual Pg 0 0 0
IV.HVZN.BHZ. 2009-02-07T08:03:04.81 0.1 undecidable manual Sg 128 96.5256 0.324 83
IV.MSRU.BHZ. 2009-02-07T08:03:01.71 0.1 undecidable manual Pn 67 156.1215 0.386 71
IV.GMNA.SHZ. 2009-02-07T08:03:00.29 10.0 undecidable manual Pg 0 0 0
IV.HAVL.BHZ. 2009-02-07T08:02:58.39 0.1 negative manual Pn 127 139.8489 -0.423 74
IV.RAFF.HHZ. 2009-02-07T08:02:57.97 0.1 undecidable manual Sg 141 70.9734 0.319 87
IV.MMME.BHZ. 2009-02-07T08:02:57.64 0.1 undecidable manual Pn 79 124.3866 1.205 55
IV.ERC.SHZ. 2009-02-07T08:02:56.71 0.3 undecidable manual Pn 288 116.7942 1.453 37
IV.AGST.EHE. 2009-02-07T08:02:56.48 0.1 undecidable manual Pn 113 130.9689 -0.969 61
IV.ILLI.BHZ. 2009-02-07T08:02:56.69 0.1 undecidable manual Pn 49 124.3866 0.259 80
IV.IVPL.BHZ. 2009-02-07T08:02:56.23 0.1 undecidable manual Pn 53 121.7892 0.195 81
IV.USI.SHZ. 2009-02-07T08:02:56.17 0.1 undecidable manual Pn 332 124.3866 -0.259 80
I1.HAGA.BHZ. 2009-02-07T08:02:55.84 0.1 undecidable manual Pn 113 123.8871 -0.516 75
IV.HCRL.BHE. 2009-02-07T08:02:54.29 0.1 undecidable manual Pn 115 114.0969 -0.564 75
IV.HMDC.BHZ. 2009-02-07T08:02:54.84 0.1 undecidable manual Pn 136 117.4935 -0.531 76
IV.IFIL.BHZ. 2009-02-07T08:02:54.17 0.1 undecidable manual Pn 34 112.2987 -0.402 79
IV.CORL.HHZ. 2009-02-07T08:02:52.80 0.1 undecidable manual Sg 292 52.3032 0.124 94
IV.HVZN.BHZ. 2009-02-07T08:02:52.15 0.1 undecidable manual Pg 128 96.5256 0.006 89
I1.IACL.BHZ. 2009-02-07T08:02:52.70 0.1 undecidable manual Pn 26 99.7224 0.063 87
IV.ESLN.BHZ. 2009-02-07T08:02:49.70 0.1 undecidable manual Pn 92 97.8243 -2.647 15
IV.GALF.HHZ. 2009-02-07T08:02:47.51 0.1 undecidable manual Pg 91 61.9935 0.687 79
IV.RAFF.HHZ. 2009-02-07T08:02:47.97 0.1 undecidable manual Pg 141 70.9734 -0.227 89
IV.CORL.HHZ. 2009-02-07T08:02:45.12 0.1 undecidable manual Pg 292 52.3032 -0.207 93
IV.RESU.HHZ. 2009-02-07T08:02:43.21 0.1 undecidable manual Sg 116 19.2696 0.862 80
IV.GIB.SHZ. 2009-02-07T08:02:42.13 0.1 undecidable manual Pg 26 33.0447 0.085 98
IV.CSLB.SHZ. 2009-02-07T08:02:41.00 0.1 undecidable manual Pg 36 29.4483 -0.342 94
IV.MA9.HHN. 2009-02-07T08:02:40.11 10.0 undecidable manual Pg 0 0 0
IV.ALJA.HHZ. 2009-02-07T08:02:39.72 0.1 undecidable manual Sg 288 9.7791 0.331 97
IV.RESU.HHZ. 2009-02-07T08:02:38.80 0.1 negative manual Pg 116 19.2696 -0.562 90
IV.ALJA.HHZ. 2009-02-07T08:02:37.45 0.1 undecidable manual Pg 288 9.7791 -0.205 100
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