Earthquake with magnitude of ML 3.1 on date 06-04-2009 and time 07:28:45 (UTC) in region 1 km S L'Aquila (AQ)

A magnitude ML 3.1 earthquake occured in region: 1 km S L'Aquila (AQ), on

  • 06-04-2009 07:28:45 (UTC)
  • 06-04-2009 09:28:45 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.3410, 13.3980 at 12 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 1 69753 69753
Lucoli AQ 7 1011 70764
Ocre AQ 9 1167 71931
Fossa AQ 9 721 72652
Tornimparte AQ 10 3187 75839
Sant'Eusanio Forconese AQ 12 394 76233
Poggio Picenze AQ 12 1136 77369
Scoppito AQ 12 3727 81096
Pizzoli AQ 14 4326 85422
Rocca di Cambio AQ 14 533 85955
Villa Sant'Angelo AQ 14 424 86379
San Demetrio ne' Vestini AQ 15 1854 88233
Barete AQ 16 737 88970
Barisciano AQ 16 1828 90798
Fagnano Alto AQ 18 418 91216
Rocca di Mezzo AQ 18 1526 92742
Prata d'Ansidonia AQ 19 496 93238
Cagnano Amiterno AQ 19 1369 94607

Municipalities with at least 50000 inhabitants

An earthquake occurred to
1 Km S of L'Aquila (69753 inhabitants)
44 Km SW of Teramo (54892 inhabitants)
63 Km W of Chieti (51815 inhabitants)
65 Km NE of Tivoli (56533 inhabitants)
65 Km W of Montesilvano (53738 inhabitants)
66 Km E of Terni (111501 inhabitants)
67 Km NE of Guidonia Montecelio (88673 inhabitants)
69 Km W of Pescara (121014 inhabitants)
89 Km SE of Foligno (57155 inhabitants)
89 Km NE of Velletri (53303 inhabitants)
90 Km NE of Roma (2864731 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
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Bulletin
Rev1000
ML 3.1 2009-04-06
07:28:45
42.341 13.398 13 2014-10-21
12:27:13
Bollettino Sismico Italiano INGV 757909
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2009-04-06 07:28:45 ± 0.08
Latitude 42.3410 ± 0.0063
Longitude 13.3980 ± 0.0085
Depth (km) 13 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-SISPICK
Event type earthquake
Origin ID 757909

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 806
Semi-minor axis of confidence ellipse (meter) 145
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 230
Circular confidence region, given by single value of horizontal uncertainty (meter) 989.9
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 42
Number of associated phases, regardless of their use for origin computation 101
Number of defining phases 46
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.67
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 3.91115
Number of stations at which the event was observed 88
Number of stations from which data was used for origin computation 36
Magnitude information

ML:3.1

Field Value
Value 3.1
Uncertainty 0.4
Num. used stations
Type of magnitude ML
Reference to an origin 757909
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-05 14:19:56
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
SI.RISI.BHZ. 2009-04-06T07:30:00.71 10.0 undecidable manual Pn 0 0 0
SI.KOSI.BHZ. 2009-04-06T07:29:54.15 10.0 undecidable manual Pn 0 0 0
NI.AGOR.HHZ. 2009-04-06T07:29:53.77 10.0 undecidable manual Pn 0 0 0
IV.PTCC.SHZ. 2009-04-06T07:29:50.52 10.0 undecidable manual Pn 0 0 0
NI.PALA.HHZ. 2009-04-06T07:29:48.86 10.0 undecidable manual Pn 0 0 0
IV.CTI.EHZ. 2009-04-06T07:29:47.34 0.6 undecidable manual Pn 342 434.1432 1.351 7
IV.PSB1.HHN. 2009-04-06T07:29:38.25 10.0 undecidable manual Sn 0 0 0
IV.SENI.EHN. 2009-04-06T07:29:35.20 10.0 undecidable manual Pn 0 0 0
IV.GSCL.SHZ. 2009-04-06T07:29:34.40 10.0 undecidable manual Pn 0 0 0
IV.MTRZ.HHZ. 2009-04-06T07:29:32.43 10.0 undecidable manual Pn 0 0 0
IV.BDI.HHZ. 2009-04-06T07:29:31.21 10.0 undecidable manual Pn 0 0 0
IV.FNVD.HHZ. 2009-04-06T07:29:29.36 10.0 undecidable manual Pn 0 0 0
IV.SEI.SHZ. 2009-04-06T07:29:28.71 10.0 undecidable manual Pn 0 0 0
IV.CRMI.HHZ. 2009-04-06T07:29:26.86 10.0 undecidable manual Pn 0 0 0
IV.VMG.SHZ. 2009-04-06T07:29:24.89 10.0 undecidable manual Pn 0 0 0
IV.SGTA.HHZ. 2009-04-06T07:29:23.46 10.0 undecidable manual Pn 0 0 0
IV.PSB1.HHN. 2009-04-06T07:29:23.88 10.0 undecidable manual Pn 0 0 0
IV.MCRV.HHE. 2009-04-06T07:29:23.75 10.0 undecidable manual Pn 0 0 0
IV.CIGN.HHZ. 2009-04-06T07:29:21.03 10.0 undecidable manual Sn 0 0 0
IV.GRFL.SHZ. 2009-04-06T07:29:20.26 10.0 undecidable manual Pn 0 0 0
IV.CSNT.HHZ. 2009-04-06T07:29:20.97 10.0 undecidable manual Pn 0 0 0
IV.SFI.EHE. 2009-04-06T07:29:20.14 0.6 undecidable manual Pn 325 214.119 1.525 16
IV.RSM.SHZ. 2009-04-06T07:29:20.34 10.0 undecidable manual Pn 0 0 0
IV.SGRT.HHE. 2009-04-06T07:29:19.52 10.0 undecidable manual Pn 0 0 0
IV.PESA.HHZ. 2009-04-06T07:29:19.07 10.0 undecidable manual Pn 0 0 0
IV.ASQU.HHZ. 2009-04-06T07:29:19.00 0.6 undecidable manual Pn 322 207.5367 1.208 20
GU.PCP.HHZ. 2009-04-06T07:29:16.55 10.0 undecidable manual Pn 0 0 0
IV.CIGN.HHZ. 2009-04-06T07:29:16.42 10.0 undecidable manual Pn 0 0 0
IV.CDCA.EHZ. 2009-04-06T07:29:15.52 10.0 undecidable manual Pn 0 0 0
IV.MAON.HHZ. 2009-04-06T07:29:15.33 0.3 undecidable manual Pn 274 185.9694 0.221 48
IV.ARCI.HHZ. 2009-04-06T07:29:14.92 10.0 undecidable manual Pn 0 0 0
IV.PARC.HHZ. 2009-04-06T07:29:14.36 0.6 undecidable manual Pn 327 172.8936 0.879 28
IV.BADI.EHZ. 2009-04-06T07:29:14.34 10.0 undecidable manual Pn 0 0 0
IV.SACR.HHZ. 2009-04-06T07:29:13.94 10.0 undecidable manual Pn 0 0 0
IV.MODR.HHN. 2009-04-06T07:29:13.84 10.0 undecidable manual Pn 0 0 0
IV.CAFI.HHZ. 2009-04-06T07:29:13.73 10.0 undecidable manual Pn 0 0 0
IV.PTRJ.HHZ. 2009-04-06T07:29:12.09 10.0 undecidable manual Pn 0 0 0
IV.BSSO.HHZ. 2009-04-06T07:29:11.77 10.0 undecidable manual Pn 0 0 0
IV.FSSB.SHZ. 2009-04-06T07:29:11.53 10.0 undecidable manual Pn 0 0 0
IV.MSC.EHZ. 2009-04-06T07:29:11.88 10.0 undecidable manual Pn 0 0 0
IV.PIEI.HHZ. 2009-04-06T07:29:10.29 0.3 undecidable manual Pn 332 149.9388 0.296 56
IV.SGG.HHZ. 2009-04-06T07:29:10.78 10.0 undecidable manual Pn 0 0 0
IV.FDMO.HHE. 2009-04-06T07:29:09.68 0.6 undecidable manual Sg 342 81.252 0.07 45
IV.FRES.HHE. 2009-04-06T07:29:09.10 10.0 undecidable manual Pn 0 0 0
IV.RFI.SHZ. 2009-04-06T07:29:09.31 10.0 undecidable manual Pn 0 0 0
IV.SACS.HHZ. 2009-04-06T07:29:09.97 10.0 undecidable manual Sg 0 0 0
IV.TRIV.HHZ. 2009-04-06T07:29:09.14 10.0 undecidable manual Pn 0 0 0
IV.VAGA.HHZ. 2009-04-06T07:29:08.63 10.0 undecidable manual Pg 0 0 0
IV.AOI.HHZ. 2009-04-06T07:29:08.32 0.3 undecidable manual Pg 7 135.1647 0.599 54
IV.LATE.HHZ. 2009-04-06T07:29:08.82 10.0 undecidable manual Pg 0 0 0
IV.LPEL.HHE. 2009-04-06T07:29:07.03 0.6 undecidable manual Sg 117 72.2721 -0.203 44
IV.ARVD.HHN. 2009-04-06T07:29:07.60 0.3 undecidable manual Pg 344 133.6662 0.119 60
IV.TOLF.HHZ. 2009-04-06T07:29:06.90 10.0 undecidable manual Pg 0 0 0
IV.MGAB.HHZ. 2009-04-06T07:29:06.16 0.3 undecidable manual Pg 302 122.5884 0.376 58
IV.CESX.HHE. 2009-04-06T07:29:06.65 10.0 undecidable manual Pg 0 0 0
IV.MURB.HHZ. 2009-04-06T07:29:06.32 0.3 undecidable manual Pg 326 124.5864 0.236 60
IV.SACS.HHZ. 2009-04-06T07:29:04.90 10.0 undecidable manual Pg 0 0 0
IV.CING.HHZ. 2009-04-06T07:29:04.46 0.3 undecidable manual Pg 352 115.995 -0.298 60
IV.ROM9.HHZ. 2009-04-06T07:29:04.23 10.0 undecidable manual Pg 0 0 0
IV.LAV9.SHZ. 2009-04-06T07:29:03.83 10.0 undecidable manual Pg 0 0 0
IV.SNTG.SHZ. 2009-04-06T07:29:03.29 10.0 undecidable manual Pg 0 0 0
IV.CERT.HHZ. 2009-04-06T07:29:03.36 0.6 undecidable manual Sg 218 55.3002 0.668 40
IV.RNI2.HHZ. 2009-04-06T07:29:03.47 10.0 undecidable manual Pg 0 0 0
IV.MA9.HHZ. 2009-04-06T07:29:03.33 10.0 undecidable manual Pg 0 0 0
IV.MIDA.HHZ. 2009-04-06T07:29:02.64 0.1 undecidable manual Pg 137 104.8173 -0.406 80
IV.INTR.HHZ. 2009-04-06T07:29:02.36 0.6 undecidable manual Sg 131 55.4001 -0.359 44
IV.NRCA.HHN. 2009-04-06T07:29:02.77 0.6 undecidable manual Sg 337 59.3961 -1.007 35
IV.CAFR.HHE. 2009-04-06T07:29:02.66 10.0 undecidable manual Pg 0 0 0
IV.CERA.HHZ. 2009-04-06T07:29:01.45 0.3 undecidable manual Pg 148 97.0251 -0.389 61
IV.GIUL.HHN. 2009-04-06T07:29:01.66 0.6 undecidable manual Pg 188 87.6456 1.273 29
IV.RMP.HHZ. 2009-04-06T07:29:01.24 10.0 undecidable manual Pg 0 0 0
IV.ASSB.HHZ. 2009-04-06T07:29:01.61 0.3 undecidable manual Pg 323 98.4237 -0.451 60
IV.CESI.HHZ. 2009-04-06T07:28:59.35 0.3 undecidable manual Pg 332 83.9493 -0.474 62
IV.OFFI.HHZ. 2009-04-06T07:28:58.66 0.1 positive manual Pg 20 69.9744 0.986 69
IV.POFI.HHZ. 2009-04-06T07:28:58.03 0.3 undecidable manual Pg 159 73.8705 -0.237 66
IV.TRTR.HHZ. 2009-04-06T07:28:58.64 0.6 undecidable manual Pg 39 66.7776 1.454 27
IV.FDMO.HHE. 2009-04-06T07:28:58.85 0.1 positive manual Pg 342 81.252 -0.556 80
IV.SDI.SHZ. 2009-04-06T07:28:58.45 0.6 undecidable manual Pg 154 77.7666 -0.43 42
IV.TERO.HHZ. 2009-04-06T07:28:57.04 0.3 undecidable manual Sg 28 35.5422 -0.385 68
IV.GAVE.SHZ. 2009-04-06T07:28:57.65 10.0 undecidable manual Pg 0 0 0
IV.LPEL.HHE. 2009-04-06T07:28:57.73 0.3 undecidable manual Pg 117 72.2721 -0.303 65
IV.GUAR.HHZ. 2009-04-06T07:28:56.29 0.3 undecidable manual Pg 187 60.9945 0 71
IV.MTCE.HHZ. 2009-04-06T07:28:56.87 0.1 positive manual Pg 237 64.3911 0.056 93
IV.VVLD.HHZ. 2009-04-06T07:28:55.10 0.1 negative manual Pg 160 55.5 -0.335 90
IV.MNS.HHZ. 2009-04-06T07:28:55.44 0.1 positive manual Pg 275 58.9965 -0.534 85
IV.INTR.HHZ. 2009-04-06T07:28:55.26 0.1 undecidable manual Pg 131 55.4001 -0.168 93
IV.CERT.HHZ. 2009-04-06T07:28:55.78 0.1 positive manual Pg 218 55.3002 0.367 89
IV.NRCA.HHN. 2009-04-06T07:28:55.31 0.3 undecidable manual Pg 337 59.3961 -0.728 59
IV.VCEL.EHZ. 2009-04-06T07:28:53.41 0.3 undecidable manual Pg 81 36.741 0.85 59
.CAMP.---. 2009-04-06T07:28:53.03 0.3 undecidable manual Sg 2 21.6672 -0.705 63
IV.FIAM.HHN. 2009-04-06T07:28:53.76 0.6 undecidable manual Sg 251 24.3534 -0.696 43
IV.FAGN.HHZ. 2009-04-06T07:28:52.07 0.3 undecidable manual Sg 119 17.3715 -0.547 68
IV.TERO.HHZ. 2009-04-06T07:28:52.36 0.1 positive manual Pg 28 35.5422 -0.011 99
IV.PTQR.SHZ. 2009-04-06T07:28:52.40 0.1 negative manual Pg 180 35.3424 0.058 98
.CAMP.---. 2009-04-06T07:28:50.15 0.1 positive manual Pg 2 21.6672 -0.09 100
MN.AQU.HHE. 2009-04-06T07:28:50.04 0.1 undecidable manual Sg 13 1.4985 0.33 98
IV.FIAM.HHN. 2009-04-06T07:28:50.72 0.1 positive manual Pg 251 24.3534 0.064 100
IV.FAGN.HHZ. 2009-04-06T07:28:49.83 0.1 positive manual Pg 119 17.3715 0.235 98
MN.AQU.HHE. 2009-04-06T07:28:48.54 0.1 negative manual Pg 13 1.4985 0.623 90
IV.STR3.BHE. 2009-04-06T07:28:29.45 10.0 undecidable manual Pg 0 0 0
IV.APPI.EHZ. 2009-04-06T07:28:17.79 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