Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.5 on date 18-05-2009 and time 12:16:37 (Italy) in region 6 km NW L'Aquila (AQ)

A magnitude ML 1.5 earthquake occured in region: 6 km NW L'Aquila (AQ), on

  • 18-05-2009 10:16:37 (UTC)
  • 18-05-2009 12:16:37 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.3980, 13.3600 at 7 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.

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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 6 69753 69753
Pizzoli AQ 7 4326 74079
Barete AQ 9 737 74816
Scoppito AQ 9 3727 78543
Lucoli AQ 12 1011 79554
Tornimparte AQ 13 3187 82741
Cagnano Amiterno AQ 13 1369 84110
Capitignano AQ 15 665 84775
Ocre AQ 16 1167 85942
Fossa AQ 16 721 86663
Montereale AQ 17 2581 89244
Poggio Picenze AQ 17 1136 90380
Campotosto AQ 18 542 90922
Sant'Eusanio Forconese AQ 18 394 91316
Crognaleto TE 19 1297 92613

Municipalities with at least 50000 inhabitants

An earthquake occurred to
6 Km NW of L'Aquila (69753 inhabitants)
41 Km SW of Teramo (54892 inhabitants)
61 Km E of Terni (111501 inhabitants)
66 Km W of Montesilvano (53738 inhabitants)
67 Km W of Chieti (51815 inhabitants)
67 Km NE of Tivoli (56533 inhabitants)
68 Km NE of Guidonia Montecelio (88673 inhabitants)
71 Km W of Pescara (121014 inhabitants)
82 Km SE of Foligno (57155 inhabitants)
91 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 2.1
ML 1.5 		2009-05-18
10:16:37		 42.398 13.36 7 2014-10-21
12:27:13		 Bollettino Sismico Italiano INGV 870629
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2009-05-18 10:16:37 ± 0.21
Latitude 42.3980 ± 0.0072
Longitude 13.3600 ± 0.0122
Depth (km) 7 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-SISPICK
Event type earthquake
Origin ID 870629

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 856
Semi-minor axis of confidence ellipse (meter) 626
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 127
Circular confidence region, given by single value of horizontal uncertainty (meter) 1280.6
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 141
Number of associated phases, regardless of their use for origin computation 20
Number of defining phases 18
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.61
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.55848
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 9
Magnitudes information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.3
Num. used stations
Type of magnitude ML
Reference to an origin 870629
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-05 16:31:56

Md:2.1

Field Value
Value 2.1
Uncertainty 0.2
Num. used stations
Type of magnitude Md
Reference to an origin 870629
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-05 16:31:56
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.NRCA.SHZ. 2009-05-18T10:16:59.81 10.0 undecidable manual Sg 0 0 0
IV.INTR.HHZ. 2009-05-18T10:16:57.06 0.3 undecidable manual Sg 134 61.9935 -0.514 58
IV.PTQR.SHZ. 2009-05-18T10:16:52.53 0.3 undecidable manual Sg 175 41.8248 0.334 68
IV.VCEL.EHE. 2009-05-18T10:16:51.72 0.3 undecidable manual Sg 90 39.4272 0.211 68
IV.NRCA.SHZ. 2009-05-18T10:16:50.96 10.0 undecidable manual Pg 0 0 0
IV.INTR.HHZ. 2009-05-18T10:16:49.21 0.3 undecidable manual Pg 134 61.9935 0.065 68
IV.TERO.HHZ. 2009-05-18T10:16:48.38 0.3 undecidable manual Sg 39 31.9458 -0.595 62
IV.FIAM.HHE. 2009-05-18T10:16:46.81 0.3 undecidable manual Sg 234 24.5532 0.33 69
IV.VCEL.EHE. 2009-05-18T10:16:46.49 0.1 undecidable manual Pg 90 39.4272 0.845 75
IV.PTQR.SHZ. 2009-05-18T10:16:46.97 0.3 undecidable manual Pg 175 41.8248 0.927 56
IV.FAGN.HHZ. 2009-05-18T10:16:45.48 0.1 undecidable manual Sg 129 23.4543 -0.646 85
IV.CAMP.HHZ. 2009-05-18T10:16:44.15 0.3 undecidable manual Sg 15 15.873 0.534 66
IV.FAGN.HHZ. 2009-05-18T10:16:43.10 0.1 undecidable manual Pg 129 23.4543 0.565 85
IV.TERO.HHZ. 2009-05-18T10:16:43.34 0.3 undecidable manual Pg 39 31.9458 -0.841 56
IV.CAMP.HHZ. 2009-05-18T10:16:41.24 0.3 undecidable manual Pg 15 15.873 0.152 72
IV.FIAM.HHE. 2009-05-18T10:16:41.77 0.3 undecidable manual Pg 234 24.5532 -0.971 53
IV.T0104.EHE. 2009-05-18T10:16:40.29 0.1 undecidable manual Sg 203 4.5954 -0.197 99
MN.AQU.HHZ. 2009-05-18T10:16:40.78 0.1 undecidable manual Sg 145 5.994 -0.004 98
IV.T0104.EHE. 2009-05-18T10:16:39.11 0.1 undecidable manual Pg 203 4.5954 -0.171 98
MN.AQU.HHZ. 2009-05-18T10:16:39.39 0.1 undecidable manual Pg 145 5.994 -0.062 100
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