This week has been a most interesting week of observation . This week we finally find the magnetopause standoff returning to normal levels . The magnetopause position had been as close as the Geosynchronus Orbit . The magnetopause standoff event started late on the 6th and really did not recover till the 20th to an acceptable level where we find it today.
Just before recovery at L5 we find a failry significant Proton and Electron Event @ Stereo B on July 19th 2009 . We do not find a match @ ACE till half way through observation day on July 23rd .
Stereo B Impact also showed us a significant drop in Density and a siginficant increase in Solar Winds in the observation period from July 19th to July 21st 2009
We do detect the the reconnection and the breech of the Magnetosphere clearly in the Bx,By,Bt,Bz and Theta where we found levels recorded up to -20 . With the intial wave first being detected on the 20th and lasting till the end of this observation period with the peak having been with the event on the 22nd of July
Recap of the July 22nd event
This was one of the more interesting events of this year . There was a GeoMagnetic Disturbance Warning issued and it was only the second such warning that has been issued in 2009 thus far . Even more interesting is the event is being blamed on a Very Small Coronal Hole at a very high latitude . This event happened well before the prediction that was made by forecasters of its arrival . A very bright display of the Northern Lights descended as far South as Iowa and Wisconsin . The Magnetosphere opened a fairly large breech that lasted several hours allowing solar wind to pour into the protective shield and fuel the storm
The below is the warning that was issued with this event
IPS GEOMAGNETIC DISTURBANCE WARNING 09/02
The Interplanetary Magnetic Field Bz component has remained southward for
several hours reaching approximately -17nT at 0245UT 22 July. Expect Active geomagnetic conditions through out the UT day with a possibilty of minor storm levels at high latitudes, particularly at local night time hours.
Also noteworthy on this day were 5 triggers that all were due to local particles events which occurred near the SAA boundary.The South Atlantic Anomaly after this major Geomagnetic Disturbance and all on 22 July 2009. Also noteworthy is 3 very high peaks in radiation detected at a ground station
1.269935914 / 06:52.75 UT
2.269946189 / 09:03:07.96 UT
3.269952212 / 10:43:30.56 UT
4.269957694 / 12:14:52.84 UT
5.269963785 / 13:56:23.13 UT
It would appear that this breech in the magnetic shield happened because the solar wind contained a magnetic field that was oriented in the opposite direction to a portion of the Earth's field. The two magnetic fields interconnected through a process known as "magnetic reconnection," It allowed electrically charged particles of the solar wind to flow directly into the Earths Upper Atmosphere and when the breech closed these particles became trapped and perhaps this is what gave us the 5 triggers above the SAA boundary.This breech the forecasters could not have predicted and to those in the Northen Latitudes this was the best show that had been seen in quite a long time . I'm still getting data for this event and hope by the end of month I will be able to have a finished report that will include any consequences to the Ozone or Stratosphere
Data in Movie
Magnetosphere simulation CCMC BATSRUS
Space Based Data ACE,Stereo A & B
Fermi LAT detection of GeV flares in high redshift blazars 4C 38.41 (B2 1633+38) and PKS 0805-07
Preliminary analysis indicates that on July 22, 2009, 4C 38.41 appeared in a high state with a gamma-ray flux
The Large Area Telescope (LAT), one of the two instruments on the Fermi Gamma-ray Space Telescope, detected on July 22, 2009 increasing gamma-ray activity from two sources, positionally consistent respectively with the EGRET flat spectrum radio quasar 4C 38.41, also known as B2 1633+38, OS 356, 3EG J1635+3813, 0FGL J1635.2+3809; (RA: 16h 35m 15.493s, Dec. +38d 08m 04.50s, J2000.0, ref. 1995, AJ, 110, 880, redshift 1.814, ref. 2004, SDSS, release 3) and the gamma-ray flat spectrum radio quasar PKS 0805-07 (RA: 08h 08m 15.536s, Dec -07d 51m 09.88s, J2000.0, ref. 1995, AJ, 110, 880, redshift 1.837, ref. 1988, ApJ, 327, 561) discovered recently by Fermi LAT
Observation Period 7 days July 18th to July 24th 2009
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