Earthquake with magnitude of Md 2.0 on date 11-04-2009 and time 21:50:58 (Italy) in region 9 km N L'Aquila (AQ)

A magnitude Md 2.0 earthquake occured in region: 9 km N L'Aquila (AQ), on

  • 11-04-2009 19:50:58 (UTC)
  • 11-04-2009 21:50:58 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.4360, 13.4160 at 11 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 9 69753 69753
Pizzoli AQ 10 4326 74079
Barete AQ 11 737 74816
Capitignano AQ 13 665 75481
Crognaleto TE 14 1297 76778
Campotosto AQ 14 542 77320
Scoppito AQ 15 3727 81047
Pietracamela TE 15 271 81318
Cagnano Amiterno AQ 16 1369 82687
Fano Adriano TE 16 296 82983
Poggio Picenze AQ 17 1136 84119
Fossa AQ 17 721 84840
Montereale AQ 17 2581 87421
Lucoli AQ 17 1011 88432
Ocre AQ 18 1167 89599
Sant'Eusanio Forconese AQ 19 394 89993
Tornimparte AQ 19 3187 93180
Barisciano AQ 19 1828 95008

Municipalities with at least 50000 inhabitants

An earthquake occurred to
9 Km N of L'Aquila (69753 inhabitants)
34 Km SW of Teramo (54892 inhabitants)
61 Km W of Montesilvano (53738 inhabitants)
63 Km W of Chieti (51815 inhabitants)
65 Km E of Terni (111501 inhabitants)
66 Km W of Pescara (121014 inhabitants)
73 Km NE of Tivoli (56533 inhabitants)
75 Km NE of Guidonia Montecelio (88673 inhabitants)
82 Km SE of Foligno (57155 inhabitants)
98 Km NE of Roma (2864731 inhabitants)
99 Km NE of Velletri (53303 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Bulletin
Rev1000
Md 2.0 2009-04-11
19:50:58
42.436 13.416 11 2014-10-21
12:27:13
Bollettino Sismico Italiano INGV 791879
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2009-04-11 19:50:58 ± 0.09
Latitude 42.4360 ± 0.0045
Longitude 13.4160 ± 0.0110
Depth (km) 11 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-SISPICK
Event type earthquake
Origin ID 791879

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 870
Semi-minor axis of confidence ellipse (meter) 462
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 96
Circular confidence region, given by single value of horizontal uncertainty (meter) 1029.6
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 151
Number of associated phases, regardless of their use for origin computation 9
Number of defining phases 9
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.19
Epicentral distance of station closest to the epicenter (degree) 0.08274
Epicentral distance of station farthest from the epicenter (degree) 0.45506
Number of stations at which the event was observed 5
Number of stations from which data was used for origin computation 5
Magnitude information

Md:2.0

Field Value
Value 2.0
Uncertainty 0.2
Num. used stations
Type of magnitude Md
Reference to an origin 791879
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-05 14:59:47
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.NRCA.HHN. 2009-04-11T19:51:14.21 0.3 undecidable manual Sg 331 50.5161 0.041 71
IV.LNSS.HHN. 2009-04-11T19:51:10.07 0.3 undecidable manual Sg 301 35.8419 -0.196 70
IV.NRCA.HHN. 2009-04-11T19:51:07.34 0.1 undecidable manual Pg 331 50.5161 -0.075 94
IV.LNSS.HHN. 2009-04-11T19:51:05.37 0.1 undecidable manual Pg 301 35.8419 0.203 94
IV.CAMP.HHZ. 2009-04-11T19:51:03.49 0.1 undecidable manual Sg 357 11.0778 -0.099 100
IV.TERO.HHZ. 2009-04-11T19:51:03.51 0.1 undecidable manual Pg 36 25.752 -0.095 98
MN.AQU.HHZ. 2009-04-11T19:51:02.99 0.1 undecidable manual Sg 187 9.1797 -0.161 99
MN.AQU.HHZ. 2009-04-11T19:51:01.20 0.1 undecidable manual Pg 187 9.1797 0.146 99
IV.CAMP.HHZ. 2009-04-11T19:51:01.48 0.1 undecidable manual Pg 357 11.0778 0.166 99
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
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QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download