Earthquake with magnitude of ML 3.1 on date 06-04-2009 and time 05:43:16 (Italy) in region 4 km SW L'Aquila (AQ)

A magnitude ML 3.1 earthquake occured in region: 4 km SW L'Aquila (AQ), on

  • 06-04-2009 03:43:16 (UTC)
  • 06-04-2009 05:43:16 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.3290, 13.3630 at 9 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 4 69753 69753
Lucoli AQ 5 1011 70764
Tornimparte AQ 7 3187 73951
Scoppito AQ 10 3727 77678
Ocre AQ 10 1167 78845
Fossa AQ 11 721 79566
Pizzoli AQ 13 4326 83892
Sant'Eusanio Forconese AQ 14 394 84286
Rocca di Cambio AQ 15 533 84819
Poggio Picenze AQ 15 1136 85955
Barete AQ 15 737 86692
Villa Sant'Angelo AQ 16 424 87116
San Demetrio ne' Vestini AQ 17 1854 88970
Borgorose RI 18 4591 93561
Cagnano Amiterno AQ 18 1369 94930
Rocca di Mezzo AQ 19 1526 96456
Barisciano AQ 19 1828 98284
Fagnano Alto AQ 19 418 98702

Municipalities with at least 50000 inhabitants

An earthquake occurred to
4 Km SW of L'Aquila (69753 inhabitants)
46 Km SW of Teramo (54892 inhabitants)
62 Km NE of Tivoli (56533 inhabitants)
64 Km NE of Guidonia Montecelio (88673 inhabitants)
64 Km E of Terni (111501 inhabitants)
66 Km W of Chieti (51815 inhabitants)
68 Km W of Montesilvano (53738 inhabitants)
72 Km W of Pescara (121014 inhabitants)
86 Km NE of Velletri (53303 inhabitants)
87 Km NE of Roma (2864731 inhabitants)
88 Km SE of Foligno (57155 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 3.1 2009-04-06
03:43:16
42.329 13.363 9 2014-10-21
12:27:13
Bollettino Sismico Italiano INGV 756499
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2009-04-06 03:43:16 ± 0.1
Latitude 42.3290 ± 0.0054
Longitude 13.3630 ± 0.0085
Depth (km) 9 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-SISPICK
Event type earthquake
Origin ID 756499

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 507
Semi-minor axis of confidence ellipse (meter) 496
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 287
Circular confidence region, given by single value of horizontal uncertainty (meter) 922.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 31
Number of associated phases, regardless of their use for origin computation 110
Number of defining phases 56
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.66
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 3.92554
Number of stations at which the event was observed 97
Number of stations from which data was used for origin computation 43
Magnitude information

ML:3.1

Field Value
Value 3.1
Uncertainty 0.5
Num. used stations
Type of magnitude ML
Reference to an origin 756499
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-05 14:18:16
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
SI.ROSI.BHN. 2009-04-06T03:44:32.15 10.0 undecidable manual Pn 0 0 0
SI.RISI.BHZ. 2009-04-06T03:44:30.11 10.0 undecidable manual Pn 0 0 0
SI.ABSI.BHZ. 2009-04-06T03:44:28.65 10.0 undecidable manual Pn 0 0 0
SI.KOSI.BHZ. 2009-04-06T03:44:25.05 10.0 undecidable manual Pn 0 0 0
NI.ACOM.HHZ. 2009-04-06T03:44:23.69 10.0 undecidable manual Pn 0 0 0
IV.PTCC.SHZ. 2009-04-06T03:44:20.28 10.0 undecidable manual Pn 0 0 0
IV.CTI.EHZ. 2009-04-06T03:44:18.15 0.3 undecidable manual Pn 342 434.4318 0.524 15
NI.PALA.HHZ. 2009-04-06T03:44:18.13 0.6 undecidable manual Pn 356 435.7305 0.342 10
MN.CUC.HHN. 2009-04-06T03:44:18.52 10.0 undecidable manual Pn 0 0 0
NI.VINO.HHZ. 2009-04-06T03:44:17.43 0.3 undecidable manual Pn 359 435.4308 -0.313 16
NI.POLC.HHZ. 2009-04-06T03:44:16.42 10.0 undecidable manual Pn 0 0 0
IV.ZCCA.HHZ. 2009-04-06T03:44:13.97 10.0 undecidable manual Pn 0 0 0
IV.CMPR.HHE. 2009-04-06T03:44:08.93 10.0 undecidable manual Pn 0 0 0
IV.MTRZ.HHZ. 2009-04-06T03:44:04.13 10.0 undecidable manual Pn 0 0 0
IV.BDI.HHE. 2009-04-06T03:44:04.03 10.0 undecidable manual Pn 0 0 0
IV.CDRU.HHN. 2009-04-06T03:44:03.76 10.0 undecidable manual Pn 0 0 0
GU.MAIM.HHE. 2009-04-06T03:44:02.54 10.0 undecidable manual Pn 0 0 0
IV.SEI.SHZ. 2009-04-06T03:43:58.91 10.0 undecidable manual Pn 0 0 0
IV.CRMI.HHZ. 2009-04-06T03:43:57.18 10.0 undecidable manual Pn 0 0 0
IV.CAFE.HHZ. 2009-04-06T03:43:55.91 10.0 undecidable manual Pn 0 0 0
IV.VMG.SHZ. 2009-04-06T03:43:54.25 10.0 undecidable manual Pn 0 0 0
IV.SGTA.HHZ. 2009-04-06T03:43:54.11 10.0 undecidable manual Pn 0 0 0
IV.MRB1.HHN. 2009-04-06T03:43:53.36 10.0 undecidable manual Pn 0 0 0
IV.MRLC.HHE. 2009-04-06T03:43:53.88 10.0 undecidable manual Pn 0 0 0
IV.MSAG.HHN. 2009-04-06T03:43:52.37 0.3 undecidable manual Pn 107 220.7124 1.337 25
IV.GRFL.SHZ. 2009-04-06T03:43:51.06 10.0 undecidable manual Pn 0 0 0
IV.CSNT.HHZ. 2009-04-06T03:43:51.43 10.0 undecidable manual Pn 0 0 0
IV.CSSN.SHZ. 2009-04-06T03:43:51.02 10.0 undecidable manual Pn 0 0 0
IV.RSM.HHE. 2009-04-06T03:43:51.38 10.0 undecidable manual Pn 0 0 0
IV.SFI.EHN. 2009-04-06T03:43:51.00 0.6 undecidable manual Pn 325 213.5196 0.861 22
IV.ASQU.HHZ. 2009-04-06T03:43:51.88 10.0 undecidable manual Pn 0 0 0
IV.FG5.SHZ. 2009-04-06T03:43:50.93 10.0 undecidable manual Pn 0 0 0
IV.SGRT.HHE. 2009-04-06T03:43:50.33 0.3 undecidable manual Pn 107 206.238 1.104 30
IV.PSB1.HHZ. 2009-04-06T03:43:49.00 10.0 undecidable manual Pn 0 0 0
IV.CASP.HHE. 2009-04-06T03:43:49.67 0.1 undecidable manual Pn 285 210.4338 -0.075 56
IV.PESA.HHZ. 2009-04-06T03:43:49.00 10.0 undecidable manual Pn 0 0 0
IV.PE9.EHZ. 2009-04-06T03:43:49.79 10.0 undecidable manual Pn 0 0 0
IV.SENI.EHE. 2009-04-06T03:43:47.75 10.0 undecidable manual Pn 0 0 0
IV.SACR.HHE. 2009-04-06T03:43:46.59 10.0 undecidable manual Pn 0 0 0
IV.MAON.HHE. 2009-04-06T03:43:46.20 0.3 undecidable manual Pn 274 183.2832 -0.164 48
IV.CIGN.HHZ. 2009-04-06T03:43:46.75 10.0 undecidable manual Pn 0 0 0
IV.BADI.EHN. 2009-04-06T03:43:46.08 10.0 undecidable manual Pn 0 0 0
IV.PARC.HHZ. 2009-04-06T03:43:45.64 0.3 undecidable manual Pn 328 172.494 0.762 43
IV.ARCI.HHZ. 2009-04-06T03:43:44.85 0.3 undecidable manual Pn 291 164.7129 1.167 37
IV.FG2.SHZ. 2009-04-06T03:43:44.79 10.0 undecidable manual Pn 0 0 0
IV.CAFI.HHZ. 2009-04-06T03:43:44.95 10.0 undecidable manual Pn 0 0 0
IV.FSSB.SHZ. 2009-04-06T03:43:43.09 10.0 undecidable manual Pn 0 0 0
IV.FDMO.HHZ. 2009-04-06T03:43:42.20 0.3 undecidable manual Sg 344 81.5517 0.896 52
IV.PTRJ.HHZ. 2009-04-06T03:43:42.81 10.0 undecidable manual Pn 0 0 0
IV.SGG.HHZ. 2009-04-06T03:43:42.22 10.0 undecidable manual Pn 0 0 0
IV.BSSO.HHZ. 2009-04-06T03:43:42.20 10.0 undecidable manual Pn 0 0 0
IV.PIEI.HHN. 2009-04-06T03:43:41.80 0.3 undecidable manual Pn 334 149.739 0.419 54
IV.VAGA.HHZ. 2009-04-06T03:43:41.02 10.0 undecidable manual Pn 0 0 0
IV.SACS.HHZ. 2009-04-06T03:43:40.81 10.0 undecidable manual Pg 0 0 0
IV.MODR.HHZ. 2009-04-06T03:43:40.60 0.3 undecidable manual Pg 162 138.0618 1.025 43
IV.RFI.SHZ. 2009-04-06T03:43:40.11 10.0 undecidable manual Pg 0 0 0
IV.LATE.HHZ. 2009-04-06T03:43:39.95 0.3 undecidable manual Pg 284 131.3685 1.398 36
IV.TRIV.HHZ. 2009-04-06T03:43:39.79 10.0 undecidable manual Pg 0 0 0
IV.LPEL.HHE. 2009-04-06T03:43:39.93 0.6 undecidable manual Sg 115 74.37 0.56 40
IV.AOI.HHN. 2009-04-06T03:43:39.65 0.3 undecidable manual Pg 8 136.7631 0.266 57
IV.ARVD.HHZ. 2009-04-06T03:43:38.88 0.1 undecidable manual Pg 345 134.0658 -0.085 79
IV.FRES.HHZ. 2009-04-06T03:43:38.59 10.0 undecidable manual Pg 0 0 0
IV.MURB.HHN. 2009-04-06T03:43:37.97 0.3 undecidable manual Pg 327 123.987 0.555 55
IV.MGAB.HHN. 2009-04-06T03:43:37.87 0.3 undecidable manual Pg 303 120.8901 0.94 47
IV.TOLF.HHZ. 2009-04-06T03:43:37.43 10.0 undecidable manual Pg 0 0 0
IV.RNI2.HHN. 2009-04-06T03:43:36.72 10.0 undecidable manual Pg 0 0 0
IV.CERA.HHZ. 2009-04-06T03:43:36.13 10.0 undecidable manual Pg 0 0 0
IV.CING.HHZ. 2009-04-06T03:43:36.10 0.3 undecidable manual Pg 353 116.8941 -0.209 60
IV.MTCE.HHZ. 2009-04-06T03:43:35.53 0.6 undecidable manual Sg 237 61.2942 -0.366 43
IV.GAVE.SHZ. 2009-04-06T03:43:35.56 10.0 undecidable manual Pg 0 0 0
IV.NRCA.HHZ. 2009-04-06T03:43:35.59 0.6 undecidable manual Sg 340 59.496 0.183 45
IV.ROM9.HHZ. 2009-04-06T03:43:34.50 10.0 undecidable manual Pg 0 0 0
IV.VVLD.HHZ. 2009-04-06T03:43:34.07 0.6 undecidable manual Sg 157 55.3002 -0.221 45
IV.MIDA.HHZ. 2009-04-06T03:43:34.56 10.0 undecidable manual Pg 0 0 0
IV.INTR.HHN. 2009-04-06T03:43:34.24 0.6 undecidable manual Sg 128 56.7987 -0.446 43
IV.MA9.HHN. 2009-04-06T03:43:33.56 10.0 undecidable manual Pg 0 0 0
IV.CERT.HHZ. 2009-04-06T03:43:32.86 0.6 undecidable manual Sg 217 52.6029 -0.698 40
IV.GIUL.HHZ. 2009-04-06T03:43:32.33 0.1 undecidable manual Pg 186 86.0472 0.773 72
IV.RDP.BHZ. 2009-04-06T03:43:31.16 0.6 undecidable manual Pg 220 82.7505 0.105 44
IV.CESI.HHZ. 2009-04-06T03:43:31.12 0.1 undecidable manual Pg 334 83.7495 -0.087 88
IV.CAFR.HHE. 2009-04-06T03:43:30.66 0.1 undecidable manual Pg 98 81.5517 -0.209 86
IV.FDMO.HHZ. 2009-04-06T03:43:30.20 0.1 undecidable manual Pg 344 81.5517 -0.676 76
.SDI.---. 2009-04-06T03:43:30.58 0.1 undecidable manual Pg 152 77.9664 0.259 86
IV.RMP.HHZ. 2009-04-06T03:43:30.19 0.3 undecidable manual Pg 224 79.1652 -0.311 64
IV.POFI.HHZ. 2009-04-06T03:43:30.93 0.3 undecidable manual Pg 157 73.7706 1.266 44
IV.OFFI.HHZ. 2009-04-06T03:43:29.89 0.1 undecidable manual Pg 21 72.1722 0.469 83
IV.LPEL.HHE. 2009-04-06T03:43:29.18 0.1 undecidable manual Pg 115 74.37 -0.579 80
IV.TRTR.HHZ. 2009-04-06T03:43:29.65 0.1 undecidable manual Pg 40 69.5748 0.623 79
IV.TERO.HHZ. 2009-04-06T03:43:28.72 0.6 undecidable manual Sg 31 38.0286 -0.96 36
IV.GUAR.HHZ. 2009-04-06T03:43:28.13 0.1 undecidable manual Pg 184 59.496 0.661 79
.PTQR.---. 2009-04-06T03:43:27.94 0.6 undecidable manual Sg 175 34.2435 -0.727 40
IV.MTCE.HHZ. 2009-04-06T03:43:27.24 0.1 undecidable manual Pg 237 61.2942 -0.513 84
IV.INTR.HHN. 2009-04-06T03:43:26.35 0.3 undecidable manual Pg 128 56.7987 -0.705 59
IV.NRCA.HHZ. 2009-04-06T03:43:26.77 0.1 undecidable manual Pg 340 59.496 -0.701 78
.MNS.---. 2009-04-06T03:43:26.37 0.1 undecidable manual Pg 277 56.1993 -0.599 82
IV.VVLD.HHZ. 2009-04-06T03:43:26.66 0.1 undecidable manual Pg 157 55.3002 -0.166 91
IV.CERT.HHZ. 2009-04-06T03:43:25.90 0.1 undecidable manual Pg 217 52.6029 -0.503 85
IV.FIAM.HHZ. 2009-04-06T03:43:24.54 0.3 undecidable manual Sg 251 21.2676 -0.124 74
.VCEL.---. 2009-04-06T03:43:24.16 0.3 undecidable manual Pg 79 39.8268 -0.275 69
.FAGN.---. 2009-04-06T03:43:24.33 0.3 undecidable manual Sg 111 19.4694 0.251 72
IV.CAMP.HHZ. 2009-04-06T03:43:24.62 0.1 undecidable manual Sg 9 23.1546 -0.656 85
.PTQR.---. 2009-04-06T03:43:23.03 0.1 undecidable manual Pg 175 34.2435 -0.549 87
IV.TERO.HHZ. 2009-04-06T03:43:23.21 0.1 undecidable manual Pg 31 38.0286 -0.954 73
IV.CAMP.HHZ. 2009-04-06T03:43:21.30 0.1 undecidable manual Pg 9 23.1546 -0.322 94
IV.FIAM.HHZ. 2009-04-06T03:43:21.30 0.1 undecidable manual Pg 251 21.2676 0.032 100
.AQU.---. 2009-04-06T03:43:20.32 0.3 undecidable manual Sg 50 4.1958 0.215 74
.FAGN.---. 2009-04-06T03:43:20.89 0.1 positive manual Pg 111 19.4694 -0.041 100
.AQU.---. 2009-04-06T03:43:18.88 0.1 negative manual Pg 50 4.1958 0.244 98
IV.STR4.BHN. 2009-04-06T03:42:57.68 10.0 undecidable manual Pg 0 0 0
IV.STR3.BHE. 2009-04-06T03:42:55.56 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