Content-class: urn:content-classes:message Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Subject: [IGSSTATION-1351]: IGS05 Review - MKEA, YSSK Date: Tue, 23 Jan 2007 16:48:44 -0500 Message-ID: <159FD28F03D76E468EE6650EB50072D003622333@S0-OTT-X2.nrn.nrcan.gc.ca> Thread-Topic: IGS05 Review - MKEA, YSSK Thread-Index: Acc/OEFB1NjFB0qrT3Oqs2Rvwh0VJw== From: =?iso-8859-1?Q?Ferland=2C_R=E9mi?= To: Sender: owner-igsstation Precedence: bulk ****************************************************************************** IGS Station Mail 23 Jan 13:48:47 PST 2007 Message Number 1351 ****************************************************************************** Author: R. Ferland Dear IGS colleagues, Starting with this week (1409) SINEX combination, stations MKEA and YSSK will not be included in the Reference Frame realization (IGS05). Both stations have experienced earthquakes recently. MKEA (Hawaii, USA): The responsible earthquake (M6.7) occurred on October 15: http://earthquake.usgs.gov/eqcenter/eqinthenews/2006/ustwbh/ The effect is mainly in the EW direction (~8mm). Nearby stations KOKB & HNLC do not appear to have been significantly affected. YSSK (Eastern Russian Federation): The cause was originally believed to be snow accumulation, but, was ruled out after exchanges with the Primary point of contact, G. Steblov, who also suggested that an earthquake (M8.3) that occurred on November 15, was responsible: http://earthquake.usgs.gov/eqcenter/eqinthenews/2006/usvcam/ The effect is also mainly in the EW direction (~10mm). Another recent (Jan. 13) earthquake (M 8.1) in the same area may also affect the station. http://earthquake.usgs.gov/eqcenter/eqinthenews/2007/us2007xmae/ P.S.: Note that due to the reference frame change that occurred at about the same time (Nov 5 2006 (wk 1400)) and which also included the relative to absolute antenna phase center change, the estimate of the earthquake effect is more difficult. Best Regards, Remi,