Earthquake with magnitude of Mw 3.7 on date 03-07-2009 and time 13:03:07 (Italy) in region 5 km NW L'Aquila (AQ)

A magnitude Mw 3.7 earthquake occured in region: 5 km NW L'Aquila (AQ), on

  • 03-07-2009 11:03:07 (UTC)
  • 03-07-2009 13:03:07 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.3910, 13.3820 at 10 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
L'Aquila AQ 5 69753 69753
Pizzoli AQ 9 4326 74079
Scoppito AQ 10 3727 77806
Barete AQ 11 737 78543
Lucoli AQ 12 1011 79554
Tornimparte AQ 13 3187 82741
Fossa AQ 14 721 83462
Ocre AQ 14 1167 84629
Cagnano Amiterno AQ 15 1369 85998
Poggio Picenze AQ 15 1136 87134
Capitignano AQ 16 665 87799
Sant'Eusanio Forconese AQ 16 394 88193
Villa Sant'Angelo AQ 19 424 88617
San Demetrio ne' Vestini AQ 19 1854 90471
Montereale AQ 19 2581 93052
Barisciano AQ 19 1828 94880
Campotosto AQ 19 542 95422
Rocca di Cambio AQ 19 533 95955
Crognaleto TE 19 1297 97252

Municipalities with at least 50000 inhabitants

An earthquake occurred to
5 Km NW of L'Aquila (69753 inhabitants)
40 Km SW of Teramo (54892 inhabitants)
63 Km E of Terni (111501 inhabitants)
65 Km W of Montesilvano (53738 inhabitants)
65 Km W of Chieti (51815 inhabitants)
68 Km NE of Tivoli (56533 inhabitants)
69 Km W of Pescara (121014 inhabitants)
69 Km NE of Guidonia Montecelio (88673 inhabitants)
84 Km SE of Foligno (57155 inhabitants)
92 Km NE of Roma (2864731 inhabitants)
93 Km NE of Velletri (53303 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 4.1
Mw 3.7
2009-07-03
11:03:07
42.391 13.382 10 2014-10-21
12:27:13
Bollettino Sismico Italiano INGV 914639
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2009-07-03 11:03:07 ± 0.06
Latitude 42.3910 ± 0.0036
Longitude 13.3820 ± 0.0061
Depth (km) 10 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-SISPICK
Event type earthquake
Origin ID 914639

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 449
Semi-minor axis of confidence ellipse (meter) 312
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 231
Circular confidence region, given by single value of horizontal uncertainty (meter) 640.3
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 46
Number of associated phases, regardless of their use for origin computation 73
Number of defining phases 62
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.39
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 1.50906
Number of stations at which the event was observed 59
Number of stations from which data was used for origin computation 48
Magnitudes information

Mw:3.7

Field Value
Value 3.7
Uncertainty
Num. used stations
Type of magnitude Mw
Reference to an origin 914639
Agency INGV
Autore TDMT Historical
Time of creation (UTC) 2013-11-05 08:43:08

ML:4.1

Field Value
Value 4.1
Uncertainty 0.3
Num. used stations
Type of magnitude ML
Reference to an origin 914639
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-05 17:24:40
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.SACR.HHN. 2009-07-03T11:03:37.00 10.0 undecidable manual Pn 0 0 0
IV.PARC.HHZ. 2009-07-03T11:03:35.36 0.3 undecidable manual Pg 327 167.5101 0.337 49
IV.SENI.EHE. 2009-07-03T11:03:34.40 10.0 undecidable manual Pn 0 0 0
IV.CIGN.HHZ. 2009-07-03T11:03:34.13 10.0 undecidable manual Pn 0 0 0
IV.CDCA.EHZ. 2009-07-03T11:03:33.88 10.0 undecidable manual Pn 0 0 0
IV.FSSB.HHZ. 2009-07-03T11:03:32.91 0.3 undecidable manual Pg 341 152.5362 0.196 54
IV.CESI.HHN. 2009-07-03T11:03:32.43 0.3 undecidable manual Sg 330 78.4659 1.107 46
IV.STR3.BHZ. 2009-07-03T11:03:31.78 10.0 undecidable manual Pn 0 0 0
IV.PIEI.HHE. 2009-07-03T11:03:31.64 0.6 undecidable manual Pn 332 144.4443 0.181 37
IV.LPEL.HHZ. 2009-07-03T11:03:31.56 0.6 undecidable manual Sg 120 76.0683 0.88 34
IV.BSSO.HHZ. 2009-07-03T11:03:31.97 10.0 undecidable manual Pn 0 0 0
IV.STR4.BHN. 2009-07-03T11:03:31.10 10.0 undecidable manual Pn 0 0 0
IV.LATE.HHN. 2009-07-03T11:03:30.05 0.3 undecidable manual Pg 281 131.4684 0.595 51
IV.FDMO.HHZ. 2009-07-03T11:03:30.77 0.6 undecidable manual Sg 342 75.5688 0.225 42
IV.AOI.HHN. 2009-07-03T11:03:29.42 0.3 undecidable manual Pg 8 129.87 0.211 57
IV.VAGA.HHZ. 2009-07-03T11:03:29.22 0.3 undecidable manual Pg 147 129.0708 0.129 58
IV.SACS.HHZ. 2009-07-03T11:03:29.64 0.1 undecidable manual Pg 293 130.4694 0.325 74
IV.MURB.HHZ. 2009-07-03T11:03:28.08 0.3 undecidable manual Pg 324 119.2917 0.492 55
IV.ARVD.HHZ. 2009-07-03T11:03:28.89 0.3 undecidable manual Pg 344 127.9719 -0.027 59
IV.MGAB.HHZ. 2009-07-03T11:03:27.67 0.1 undecidable manual Pg 300 118.6923 0.177 78
IV.FRES.HHZ. 2009-07-03T11:03:27.84 10.0 undecidable manual Pg 0 0 0
IV.INTR.HHZ. 2009-07-03T11:03:27.14 0.3 undecidable manual Sg 134 60.0954 0.722 56
IV.CERT.HHZ. 2009-07-03T11:03:27.05 0.6 undecidable manual Sg 214 59.0964 0.913 35
IV.TOLF.HHZ. 2009-07-03T11:03:27.75 0.3 undecidable manual Pg 253 119.1918 0.182 58
IV.CING.HHZ. 2009-07-03T11:03:26.03 0.1 undecidable manual Pg 352 110.3118 -0.167 80
IV.MIDA.HHZ. 2009-07-03T11:03:25.81 0.3 undecidable manual Pg 139 109.8123 -0.319 58
IV.SNTG.SHZ. 2009-07-03T11:03:24.78 0.1 undecidable manual Pg 340 102.4197 -0.198 80
IV.NRCA.HHZ. 2009-07-03T11:03:24.77 0.3 undecidable manual Sg 336 53.8017 0.04 68
IV.RNI2.HHZ. 2009-07-03T11:03:24.96 0.6 undecidable manual Pg 140 99.2229 0.472 38
IV.CERA.HHZ. 2009-07-03T11:03:24.75 0.3 undecidable manual Pg 149 102.4197 -0.233 60
IV.ROM9.HHZ. 2009-07-03T11:03:24.78 10.0 undecidable manual Pg 0 0 0
IV.LAV9.SHZ. 2009-07-03T11:03:24.70 10.0 undecidable manual Pg 0 0 0
IV.RDP.HHZ. 2009-07-03T11:03:23.09 0.3 undecidable manual Pg 218 89.0442 0.168 62
IV.ASSB.HHN. 2009-07-03T11:03:23.45 0.1 undecidable manual Pg 321 93.3399 -0.132 83
IV.GIUL.HHN. 2009-07-03T11:03:23.44 0.6 undecidable manual Pg 187 92.9403 -0.085 42
IV.RMP.HHZ. 2009-07-03T11:03:22.37 0.6 undecidable manual Pg 221 85.248 0.031 43
IV.CAFR.HHZ. 2009-07-03T11:03:22.21 0.6 undecidable manual Pg 103 81.1521 0.498 39
IV.SDI.SHZ. 2009-07-03T11:03:21.64 0.3 undecidable manual Pg 155 83.3499 -0.408 60
IV.CESI.HHN. 2009-07-03T11:03:21.15 0.1 undecidable manual Pg 330 78.4659 -0.146 85
IV.LPEL.HHZ. 2009-07-03T11:03:20.80 0.3 undecidable manual Pg 120 76.0683 -0.122 65
IV.FDMO.HHZ. 2009-07-03T11:03:20.53 0.1 undecidable manual Pg 342 75.5688 -0.314 83
IV.POFI.HHZ. 2009-07-03T11:03:20.99 0.3 undecidable manual Pg 160 79.4649 -0.462 60
IV.GUMA.HHZ. 2009-07-03T11:03:20.77 0.1 undecidable manual Pg 357 74.6697 0.067 87
IV.MTCE.HHZ. 2009-07-03T11:03:19.27 0.1 undecidable manual Pg 232 66.5778 -0.193 86
IV.LNSS.HHZ. 2009-07-03T11:03:19.92 0.6 undecidable manual Sg 310 36.5412 -0.211 45
IV.T0201.EHZ. 2009-07-03T11:03:19.80 0.3 undecidable manual Pg 167 69.7746 -0.156 65
IV.GUAR.HHZ. 2009-07-03T11:03:19.21 0.3 undecidable manual Pg 185 66.378 -0.223 64
IV.VCEL.EHZ. 2009-07-03T11:03:19.95 0.6 undecidable manual Sg 89 37.5291 -0.449 43
IV.TRTR.HHZ. 2009-07-03T11:03:19.97 0.3 undecidable manual Pg 43 63.492 0.989 50
IV.CESX.HHZ. 2009-07-03T11:03:19.61 0.1 undecidable manual Pg 291 69.9744 -0.377 82
IV.OFFI.HHZ. 2009-07-03T11:03:19.89 0.1 undecidable manual Pg 22 65.2902 0.635 77
IV.TERO.HHZ. 2009-07-03T11:03:18.14 0.6 undecidable manual Sg 35 31.4463 -0.637 41
IV.INTR.HHZ. 2009-07-03T11:03:18.36 0.1 undecidable manual Pg 134 60.0954 -0.103 89
IV.CERT.HHZ. 2009-07-03T11:03:18.11 0.1 undecidable manual Pg 214 59.0964 -0.191 88
IV.VVLD.HHZ. 2009-07-03T11:03:18.30 0.1 undecidable manual Pg 161 61.0944 -0.319 85
IV.GAVE.SHZ. 2009-07-03T11:03:17.16 0.6 undecidable manual Pg 310 52.0035 -0.063 46
IV.MNS.HHZ. 2009-07-03T11:03:17.80 0.1 negative manual Pg 270 57.498 -0.256 87
IV.SAN2.EHZ. 2009-07-03T11:03:17.67 0.3 undecidable manual Sg 343 27.8499 -0.134 70
IV.NRCA.HHZ. 2009-07-03T11:03:17.12 0.1 undecidable manual Pg 336 53.8017 -0.366 85
IV.FIAM.HHZ. 2009-07-03T11:03:16.91 0.6 undecidable manual Sg 238 25.6521 -0.192 46
IV.PTQR.SHZ. 2009-07-03T11:03:15.38 0.1 positive manual Pg 178 40.9257 -0.132 92
IV.LNSS.HHZ. 2009-07-03T11:03:14.61 0.1 undecidable manual Pg 310 36.5412 -0.224 91
IV.VCEL.EHZ. 2009-07-03T11:03:14.92 0.1 positive manual Pg 89 37.5291 -0.065 93
IV.SAN2.EHZ. 2009-07-03T11:03:13.39 0.1 positive manual Pg 343 27.8499 -0.099 94
IV.FIAM.HHZ. 2009-07-03T11:03:13.14 0.1 positive manual Pg 238 25.6521 0.057 96
IV.TERO.HHZ. 2009-07-03T11:03:13.57 0.1 positive manual Pg 35 31.4463 -0.481 86
HL.KEK.BHE. 2009-07-03T11:03:13.15 10.0 undecidable manual Pg 0 0 0
.T0106.HLZ. 2009-07-03T11:03:12.68 0.3 undecidable manual Sg 179 9.2796 0.443 68
MN.AQU.HHZ. 2009-07-03T11:03:11.05 0.3 undecidable manual Sg 159 4.3956 -0.21 72
IV.T0104.EHN. 2009-07-03T11:03:11.32 0.3 undecidable manual Sg 227 4.995 -0.03 75
.T0106.HLZ. 2009-07-03T11:03:10.59 0.1 undecidable manual Pg 179 9.2796 0.316 93
MN.AQU.HHZ. 2009-07-03T11:03:09.70 0.1 positive manual Pg 159 4.3956 -0.012 100
IV.T0104.EHN. 2009-07-03T11:03:09.74 0.1 undecidable manual Pg 227 4.995 -0.024 100
TDMT - Time Domain Moment Tensor

TDMT details

Field Value
MagnitudeMw 3.74
Scalar Moment5.09064E+21 dyne-cm
Computed depth4 km
QualityBa
Variance Reduction%
Double Couple0%
CLVD0%
ISO0%
Model usedCIA
Modemanual
Statusfinal

Moment Tensor Components

Component Value
Mrr-4.9116E+21
Mtt4.5921E+21
Mpp3.195E+20
Mrt1.768E+20
Mrp2.4E+19
Mtp-1.8216E+21

Nodal Planes

Name Strike Dip Rake
PN128946-91
PN211144-88

Fault Plane solution

Focal Mechanism

psmeca (GMT documentation)

4 289 46 -91 111 44 -88 5.09064 21 0.5 0.5

TDMT references

More info and references
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