Earthquake with magnitude of ML 2.6 on date 06-04-2009 and time 22:50:20 (Italy) in region 1 km SE Ocre (AQ)

A magnitude ML 2.6 earthquake occured in region: 1 km SE Ocre (AQ), on

  • 06-04-2009 20:50:20 (UTC)
  • 06-04-2009 22:50:20 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.28, 13.48 at 10 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
Ocre AQ 1 1167 1167
Fossa AQ 2 721 1888
Sant'Eusanio Forconese AQ 4 394 2282
Rocca di Cambio AQ 4 533 2815
Villa Sant'Angelo AQ 5 424 3239
San Demetrio ne' Vestini AQ 7 1854 5093
Poggio Picenze AQ 7 1136 6229
Rocca di Mezzo AQ 8 1526 7755
Fagnano Alto AQ 8 418 8173
Prata d'Ansidonia AQ 11 496 8669
L'Aquila AQ 11 69753 78422
Barisciano AQ 11 1828 80250
Fontecchio AQ 12 369 80619
Lucoli AQ 12 1011 81630
San Pio delle Camere AQ 15 661 82291
Tornimparte AQ 15 3187 85478
Tione degli Abruzzi AQ 15 310 85788
Santo Stefano di Sessanio AQ 16 111 85899
Caporciano AQ 16 230 86129
Ovindoli AQ 16 1227 87356
Carapelle Calvisio AQ 17 87 87443
Castelvecchio Calvisio AQ 18 153 87596
Calascio AQ 19 137 87733
Massa d'Albe AQ 20 1476 89209

Municipalities with at least 50000 inhabitants

An earthquake occurred to
11 Km SE of L'Aquila (69753 inhabitants)
47 Km SW of Teramo (54892 inhabitants)
57 Km W of Chieti (51815 inhabitants)
61 Km W of Montesilvano (53738 inhabitants)
64 Km W of Pescara (121014 inhabitants)
66 Km NE of Tivoli (56533 inhabitants)
69 Km E of Guidonia Montecelio (88673 inhabitants)
75 Km E of Terni (111501 inhabitants)
88 Km NE of Velletri (53303 inhabitants)
93 Km E of Roma (2864731 inhabitants)
99 Km SE of Foligno (57155 inhabitants)
Recent and historical Seismicity

These maps show the seismicity for different time windows. The earthquake locations reported in these maps are determined in quasi real-time by the personnel on duty in the seismic surveillance center of INGV in Rome. Note that the earthquake source parameters (hypocentral location and magnitude) are the best estimates obstained with the available data and they are adjourned as additional data become available. The source parameters obtained by the personnel on duty are then revised by the group in charge of the INGV Seismic Bulletin (Bollettino Sismico Italiano dell’INGV).

Earthquakes of the last three days (72 hours)

Earthquakes of the last three days (72 hours)

This map reports the earthquake epicenters located in the past 72 hours (3 days) from the time this page has been generated. The radius of the circle representing the earthquake on the map scales with magnitude. The color depends on the time of occurrence of the earthquakes with respect to the time of generation of the map (red = 1 hour; orange = 24 hours; yellow = 72 hours). The open star shows the epicenter of the current earthquake.
Earthquakes of the last 90 days

Earthquakes of the last 90 days

This map reports the Magnitudo ≥ 1.0 earthquake epicenters located using the data acquired by the Italian National Seismic Network and by other collaborating networks in Italy and in the neighbouring countries. The radii of the circles representing the epicenters on the map scale with magnitude. The color of each circle depends on the time of occurrence of the earthquakes with respect to the time of generation of the map (red = 1 hour; orange = 24 hours; yellow = 72 hours; blue = all other earthquakes). The open star shows the epicenter of the current earthquake.
Earthquakes since 1985

Earthquakes since 1985

This map reports the Magnitudo ≥ 2.5 earthquake epicenters located using the data acquired by the Italian National Seismic Network and by other collaborating networks in Italy and in the neighbouring countries. The radii of the circles representing the epicenters on the map scale with magnitude. The color of each circle depends on the time of occurrence of the earthquakes with respect to the time of generation of the map (red = 1 hour; orange = 24 hours; yellow = 72 hours; blue = all other earthquakes). The open star shows the epicenter of the current earthquake.
Significant earthquakes since 1000 AD until 2006

Significant earthquakes since 1000 AD until 2006

This map shows the epicenters of the historical earthquakes catalogue CPT11 (Catalogo Parametrico dei Terremoti Italiani, 2011 version) with estimated magnitude ≥ 5.0 since 1000 AD until 2006. The epicenters are represented by squares which sides scale with the estimated earthquake magnitude. For earthquakes with magnitude ≥ 6.0, it is also shown the year of occurrence and the magnitude value. The open star shows 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
Felt maps
The earthquake effects in MCS scale as obtained from the compiled questionnaire

The earthquake effects in MCS scale as obtained from the compiled questionnaire

This map shows the distribution of the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire (http://www.haisentitoilterremoto.it/) that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Rev 1000 ML 2.6 2009-04-06
20:50:20
42.28 13.48 10 2014-10-21
12:27:13
Bollettino Sismico Italiano INGV 762869
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2009-04-06 20:50:20 ± 0.1
Latitude 42.28 ± 0.00
Longitude 13.48 ± 0.01
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-SISPICK
Event type earthquake
Origin ID 762869

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 660
Semi-minor axis of confidence ellipse (meter) 382
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 62
Circular confidence region, given by single value of horizontal uncertainty (meter) 860.2
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 56
Number of associated phases, regardless of their use for origin computation 44
Number of defining phases 32
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.52
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.85615
Number of stations at which the event was observed 30
Number of stations from which data was used for origin computation 21
Magnitude information

ML:2.6

Field Value
Value 2.6
Uncertainty 0.3
Num. used stations
Type of magnitude ML
Reference to an origin 762869
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-05 14:25:41
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.CING.HHE. 2009-04-06T20:51:01.82 10.0 undecidable manual Pg 0 0 0
IV.TRIV.HHN. 2009-04-06T20:50:59.47 10.0 undecidable manual Pg 0 0 0
IV.TOLF.HHN. 2009-04-06T20:50:59.13 10.0 undecidable manual Pg 0 0 0
IV.ASSB.HHN. 2009-04-06T20:50:57.02 10.0 undecidable manual Pg 0 0 0
IV.VAGA.HHZ. 2009-04-06T20:50:55.38 10.0 undecidable manual Sg 0 0 0
IV.MURB.HHZ. 2009-04-06T20:50:53.00 10.0 undecidable manual Pg 0 0 0
IV.VAGA.HHZ. 2009-04-06T20:50:51.63 10.0 undecidable manual Pg 0 0 0
IV.MTCE.HHE. 2009-04-06T20:50:46.56 10.0 undecidable manual Sg 0 0 0
IV.MTCE.HHE. 2009-04-06T20:50:43.27 10.0 undecidable manual Pg 0 0 0
IV.NRCA.SHZ. 2009-04-06T20:50:42.84 0.6 undecidable manual Sg 334 0.6187 0.87 35
.SDI.SHZ. 2009-04-06T20:50:42.73 1.0 undecidable manual Sg 156 0.6169 0.808 18
IV.MNS.HHZ. 2009-04-06T20:50:42.70 10.0 undecidable manual Sg 0 0 0
IV.RMP.HHE. 2009-04-06T20:50:40.25 10.0 undecidable manual Pg 0 0 0
IV.CERT.HHZ. 2009-04-06T20:50:38.31 0.6 undecidable manual Sg 229 0.4928 0.067 46
IV.MNS.HHZ. 2009-04-06T20:50:38.06 10.0 undecidable manual Pg 0 0 0
IV.MIDA.HHE. 2009-04-06T20:50:37.12 0.3 undecidable manual Pg 137 0.8562 0.003 64
IV.RNI2.HHN. 2009-04-06T20:50:36.42 0.3 undecidable manual Pg 139 0.7599 0.954 49
IV.FDMO.HHE. 2009-04-06T20:50:36.50 0.3 undecidable manual Pg 339 0.813 0.125 64
IV.GIUL.HHZ. 2009-04-06T20:50:35.05 0.3 undecidable manual Pg 193 0.7365 -0.022 66
IV.CERA.HHE. 2009-04-06T20:50:35.86 0.6 undecidable manual Pg 149 0.7869 -0.077 43
.INTR.HHN. 2009-04-06T20:50:35.65 0.6 undecidable manual Sg 130 0.411 -0.176 46
IV.OFFI.HHN. 2009-04-06T20:50:35.17 0.3 undecidable manual Pg 13 0.6754 1.141 46
.VVLD.HHN. 2009-04-06T20:50:35.91 0.3 undecidable manual Sg 165 0.42 -0.175 68
IV.TERO.HHZ. 2009-04-06T20:50:33.25 0.6 undecidable manual Sg 15 0.3588 -1.014 35
IV.CAFR.HHE. 2009-04-06T20:50:33.98 0.1 undecidable manual Pg 94 0.6439 0.499 81
IV.POFI.HHN. 2009-04-06T20:50:33.69 0.3 undecidable manual Pg 163 0.5846 1.223 45
IV.NRCA.SHZ. 2009-04-06T20:50:32.72 0.1 undecidable manual Pg 334 0.6187 -0.334 84
.SDI.SHZ. 2009-04-06T20:50:32.93 0.3 undecidable manual Pg 156 0.6169 -0.092 67
.PTQR.SHZ. 2009-04-06T20:50:31.13 0.3 undecidable manual Sg 193 0.2608 -0.229 70
IV.FIAM.HHN. 2009-04-06T20:50:31.53 0.3 undecidable manual Sg 268 0.268 -0.053 72
.CAMP.---. 2009-04-06T20:50:31.39 0.3 undecidable manual Sg 349 0.2644 -0.097 72
IV.CERT.HHZ. 2009-04-06T20:50:30.67 0.3 undecidable manual Pg 229 0.4928 -0.229 66
IV.GUAR.HHZ. 2009-04-06T20:50:30.71 0.3 undecidable manual Pg 195 0.4973 -0.259 66
.INTR.HHN. 2009-04-06T20:50:29.30 0.1 undecidable manual Pg 130 0.411 -0.206 91
.VVLD.HHN. 2009-04-06T20:50:29.33 0.1 undecidable manual Pg 165 0.42 -0.323 88
IV.TERO.HHZ. 2009-04-06T20:50:28.17 0.1 undecidable manual Pg 15 0.3588 -0.43 87
IV.FIAM.HHN. 2009-04-06T20:50:27.36 0.6 undecidable manual Pg 268 0.268 0.304 46
.CAMP.---. 2009-04-06T20:50:27.00 0.1 undecidable manual Pg 349 0.2644 0.001 97
.VCEL.EHE. 2009-04-06T20:50:27.24 0.1 undecidable manual Pg 66 0.2923 -0.22 92
.PTQR.SHZ. 2009-04-06T20:50:26.79 0.1 undecidable manual Pg 193 0.2608 -0.137 95
.FAGN.HHE. 2009-04-06T20:50:25.10 0.3 undecidable manual Sg 98 0.0773 -0.258 72
.AQU.HHZ. 2009-04-06T20:50:25.73 0.3 undecidable manual Sg 324 0.0971 -0.149 73
.AQU.HHZ. 2009-04-06T20:50:24.02 0.1 undecidable manual Pg 324 0.0971 0.265 95
.FAGN.HHE. 2009-04-06T20:50:23.50 0.1 undecidable manual Pg 98 0.0773 0.039 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.GUAR.HHN. ML:2.5 0.000635 0.5 AML other m 2009-04-06T20:50:30.71
IV.GUAR.HHE. ML:2.5 0.00062 0.34 AML other m 2009-04-06T20:50:30.71
IV.NRCA.SHZ. ML:0 0.00013 0.44 AML other m 2009-04-06T20:50:32.72
IV.OFFI.HHN. ML:3 0.00137 0.66 AML other m 2009-04-06T20:50:35.17
IV.OFFI.HHE. ML:3 0.001435 0.58 AML other m 2009-04-06T20:50:35.17
IV.RNI2.HHN. ML:2.4 0.000335 0.54 AML other m 2009-04-06T20:50:36.42
IV.RNI2.HHE. ML:2.4 0.00038 0.5 AML other m 2009-04-06T20:50:36.42
IV.MNS.HHN. ML:0 0.000275 0.38 AML other m 2009-04-06T20:50:38.06
IV.MNS.HHE. ML:0 0.0003 0.42 AML other m 2009-04-06T20:50:38.06
IV.RMP.HHN. ML:0 0.000445 0.56 AML other m 2009-04-06T20:50:40.25
IV.RMP.HHE. Md:0 29 END duration s
IV.VAGA.HHN. ML:0 0.00017 0.54 AML other m 2009-04-06T20:50:51.63
IV.VAGA.HHE. ML:0 7.0E-5 0.58 AML other m 2009-04-06T20:50:51.63
IV.MURB.HHN. ML:0 0.00022 0.92 AML other m 2009-04-06T20:50:53.00
IV.MURB.HHE. ML:0 0.00028 0.36 AML other m 2009-04-06T20:50:53.00
IV.VAGA.HHZ. Md:0 29 END duration s
IV.TOLF.HHN. Md:0 19 END duration s
IV.TRIV.HHN. Md:0 16 END duration s
IV.CING.HHE. Md:0 22 END duration s
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Focal Mechanisms

Focal Mechanisms

This map reports the focal mechanisms since 1977 in the region. The white and red beach ball symbols are mechanisms determined using the Regional Centroid Moment Tensor (RCMT, http://www.bo.ingv.it/RCMT) and are determined for earthquakes with magnitude larger than 4.5 in the Euro-Mediterranenan area. Occasionally, when there is a good source-receiver geometry of the target earthquake, the RCMT can be obtained also for earthquakes with magnitude larger than 4.0. The blue and white beach ball symbols indicate the mechanisms obtained from application of the Time Domain Moment Tensor (TDMT, http://terremoti.ingv.it/tdmt.html). This technique is used for M ≥ 3.5. The size of the beach ball sysmbol 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 full SEED format Download