Earthquake with magnitude of ML 0.4 on date 09-05-2009 and time 08:00:55 (Italy) in region 4 km N L'Aquila (AQ)

A magnitude ML 0.4 earthquake occured in region: 4 km N L'Aquila (AQ), on

  • 09-05-2009 06:00:55 (UTC)
  • 09-05-2009 08:00:55 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.3890, 13.3940 at 5 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
Pizzoli AQ 10 4326 74079
Scoppito AQ 11 3727 77806
Barete AQ 12 737 78543
Lucoli AQ 12 1011 79554
Fossa AQ 13 721 80275
Tornimparte AQ 13 3187 83462
Ocre AQ 13 1167 84629
Poggio Picenze AQ 14 1136 85765
Sant'Eusanio Forconese AQ 15 394 86159
Cagnano Amiterno AQ 16 1369 87528
Capitignano AQ 17 665 88193
Barisciano AQ 18 1828 90021
San Demetrio ne' Vestini AQ 18 1854 91875
Villa Sant'Angelo AQ 18 424 92299
Rocca di Cambio AQ 19 533 92832
Campotosto AQ 19 542 93374
Crognaleto TE 19 1297 94671
Montereale AQ 19 2581 97252
Pietracamela TE 20 271 97523

Municipalities with at least 50000 inhabitants

An earthquake occurred to
4 Km N of L'Aquila (69753 inhabitants)
40 Km SW of Teramo (54892 inhabitants)
64 Km W of Montesilvano (53738 inhabitants)
64 Km W of Chieti (51815 inhabitants)
64 Km E of Terni (111501 inhabitants)
68 Km W of Pescara (121014 inhabitants)
68 Km NE of Tivoli (56533 inhabitants)
70 Km NE of Guidonia Montecelio (88673 inhabitants)
85 Km SE of Foligno (57155 inhabitants)
93 Km NE of Roma (2864731 inhabitants)
93 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 1.4
ML 0.4
2009-05-09
06:00:55
42.389 13.394 5 2014-10-21
12:27:13
Bollettino Sismico Italiano INGV 857469
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2009-05-09 06:00:55 ± 0.1
Latitude 42.3890 ± 0.0018
Longitude 13.3940 ± 0.0049
Depth (km) 5 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-SISPICK
Event type earthquake
Origin ID 857469

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 291
Semi-minor axis of confidence ellipse (meter) 222
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 240
Circular confidence region, given by single value of horizontal uncertainty (meter) 447.2
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 129
Number of associated phases, regardless of their use for origin computation 12
Number of defining phases 10
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.11
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.18616
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 5
Magnitudes information

ML:0.4

Field Value
Value 0.4
Uncertainty 0.0
Num. used stations
Type of magnitude ML
Reference to an origin 857469
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-05 16:16:25

Md:1.4

Field Value
Value 1.4
Uncertainty 0.1
Num. used stations
Type of magnitude Md
Reference to an origin 857469
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-05 16:16:25
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MRB1.HHZ. 2009-05-09T06:01:12.73 10.0 undecidable manual Pg 0 0 0
IV.FAGN.HHN. 2009-05-09T06:01:03.48 0.3 undecidable manual Sg 131 20.6682 0.152 71
IV.CAMP.HHE. 2009-05-09T06:01:01.94 0.1 undecidable manual Sg 4 16.3725 0.056 97
IV.FAGN.HHN. 2009-05-09T06:01:00.13 0.1 undecidable manual Pg 131 20.6682 -0.065 96
IV.CAMP.HHE. 2009-05-09T06:00:59.31 0.1 undecidable manual Pg 4 16.3725 -0.057 97
IV.T0103.HLZ. 2009-05-09T06:00:58.06 0.1 undecidable manual Sg 0 0 0
IV.T0104.EHE. 2009-05-09T06:00:58.62 0.1 undecidable manual Sg 235 5.5944 0.07 99
MN.AQU.HHZ. 2009-05-09T06:00:58.10 0.1 undecidable manual Sg 170 3.8961 -0.054 99
MN.AQU.HHZ. 2009-05-09T06:00:57.15 0.1 undecidable manual Pg 170 3.8961 -0.064 99
IV.T0103.HLZ. 2009-05-09T06:00:57.19 0.1 undecidable manual Pg 0 0 0
IV.T0104.EHE. 2009-05-09T06:00:57.45 0.1 undecidable manual Pg 235 5.5944 0.007 100
IV.BSSO.HHE. 2009-05-09T06:00:55.63 10.0 undecidable manual Pg 0 0 0
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download