Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.5 on date 09-04-2009 and time 01:40:29 (Italy) in region 2 km SW Ocre (AQ)

A magnitude ML 1.5 earthquake occured in region: 2 km SW Ocre (AQ), on

  • 08-04-2009 23:40:29 (UTC)
  • 09-04-2009 01:40:29 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.2650, 13.4630 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.

Hai sentito il terremoto? Clicca qui

Did you feel it? Fill in the questionnaire.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Ocre AQ 2 1167 1167
Rocca di Cambio AQ 4 533 1700
Fossa AQ 4 721 2421
Sant'Eusanio Forconese AQ 6 394 2815
Villa Sant'Angelo AQ 6 424 3239
Rocca di Mezzo AQ 8 1526 4765
San Demetrio ne' Vestini AQ 8 1854 6619
Poggio Picenze AQ 9 1136 7755
Fagnano Alto AQ 9 418 8173
Lucoli AQ 11 1011 9184
L'Aquila AQ 11 69753 78937
Prata d'Ansidonia AQ 12 496 79433
Fontecchio AQ 12 369 79802
Barisciano AQ 13 1828 81630
Tornimparte AQ 14 3187 84817
Ovindoli AQ 15 1227 86044
Tione degli Abruzzi AQ 16 310 86354
San Pio delle Camere AQ 16 661 87015
Caporciano AQ 17 230 87245
Santo Stefano di Sessanio AQ 18 111 87356
Massa d'Albe AQ 18 1476 88832
Carapelle Calvisio AQ 19 87 88919
Castelvecchio Calvisio AQ 19 153 89072

Municipalities with at least 50000 inhabitants

An earthquake occurred to
11 Km SE of L'Aquila (69753 inhabitants)
48 Km SW of Teramo (54892 inhabitants)
59 Km W of Chieti (51815 inhabitants)
63 Km W of Montesilvano (53738 inhabitants)
64 Km NE of Tivoli (56533 inhabitants)
66 Km W of Pescara (121014 inhabitants)
67 Km E of Guidonia Montecelio (88673 inhabitants)
75 Km E of Terni (111501 inhabitants)
86 Km NE of Velletri (53303 inhabitants)
91 Km E of Roma (2864731 inhabitants)
99 Km SE of Foligno (57155 inhabitants)
100 Km NE of Latina (125985 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
ML 1.5 		2009-04-08
23:40:29		 42.265 13.463 9 2014-10-21
12:27:13		 Bollettino Sismico Italiano INGV 776639
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2009-04-08 23:40:29 ± 0.08
Latitude 42.2650 ± 0.0045
Longitude 13.4630 ± 0.0061
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 776639

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 458
Semi-minor axis of confidence ellipse (meter) 445
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 233
Circular confidence region, given by single value of horizontal uncertainty (meter) 707.1
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 92
Number of associated phases, regardless of their use for origin computation 14
Number of defining phases 14
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.28
Epicentral distance of station closest to the epicenter (degree) 0.08903
Epicentral distance of station farthest from the epicenter (degree) 0.41369
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 7
Magnitudes information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.2
Num. used stations
Type of magnitude ML
Reference to an origin 776639
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-05 14:41:52

Md:2.0

Field Value
Value 2.0
Uncertainty 0.2
Num. used stations
Type of magnitude Md
Reference to an origin 776639
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-05 14:41:52
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.INTR.HHN. 2009-04-08T23:40:44.75 0.3 undecidable manual Sg 128 45.9207 -0.213 69
IV.VVLD.HHE. 2009-04-08T23:40:44.80 0.3 undecidable manual Sg 163 45.8208 -0.135 71
IV.VCEL.EHZ. 2009-04-08T23:40:42.23 0.6 undecidable manual Sg 65 34.1436 0.424 45
IV.PTQR.SHZ. 2009-04-08T23:40:40.02 0.6 undecidable manual Sg 191 27.4503 0.121 49
IV.FIAM.HHN. 2009-04-08T23:40:39.79 0.3 undecidable manual Sg 271 28.3494 -0.411 69
IV.INTR.HHN. 2009-04-08T23:40:38.39 0.3 undecidable manual Pg 128 45.9207 -0.179 70
IV.VVLD.HHE. 2009-04-08T23:40:38.92 0.1 undecidable manual Pg 163 45.8208 0.37 90
IV.VCEL.EHZ. 2009-04-08T23:40:36.50 0.1 undecidable manual Pg 65 34.1436 -0.245 94
IV.PTQR.SHZ. 2009-04-08T23:40:35.77 0.1 undecidable manual Pg 191 27.4503 0.125 97
IV.FIAM.HHN. 2009-04-08T23:40:35.92 0.1 undecidable manual Pg 271 28.3494 0.102 98
MN.AQU.HHN. 2009-04-08T23:40:34.85 0.3 undecidable manual Sg 333 10.9779 0.019 77
IV.FAGN.HHZ. 2009-04-08T23:40:34.34 0.1 undecidable manual Sg 90 9.879 -0.199 99
IV.FAGN.HHZ. 2009-04-08T23:40:32.70 0.1 undecidable manual Pg 90 9.879 0.149 100
MN.AQU.HHN. 2009-04-08T23:40:32.87 0.1 undecidable manual Pg 333 10.9779 0.147 100
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