27 January 2000
- Three day image of energetic ions (NRT ACE): EPAM experiment
- Three day image of energetic electrons (NRT ACE): EPAM experiment
- Three day image of > 10 (and > 30 MeV) energetic ions (NRT ACE): SIS experiment
- Ten days image of solar wind conditions (Magnetic Field and Plasma Data from
WIND SWE and MFI, and ACE SWEPAM and MAG instruments)
- Ten days image of shock EP from before to several days after the CIR: LEMT experiment in WIND
- Satellite Environ., Three days plot, Jan 28: H-component Magnetospheric Field
- Satellite Environ., Three days plot, Jan 28: MeV electrons at geo-stationary orbit
- AURORAS over North Atlantic to
Norway (ISTP POLAR/VIS): VIS experiment
- AURORAS over North Atlantic to
Norway (ISTP POLAR/UVI.1): UVI experiment
- AURORAS over North Atlantic to Norway (ISTP POLAR/UVI.2): UVI experiment
Unusual Corotating Interactive Region (CIR) on January 27, 2000
Sun Signatures of the Event
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Quick look synoptic Ha and HeI chart showing a huge equatorial Coronal Hole
(Details correspond to the Sun chromosphere for Carrington rotation 1957)
Interplanetary Response
Geomagnetic Response
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January 26 - February 5 EVENT SUMMARY From Daniel Berdichevsky (SPOF) Jan. 26, Solar Wind conditions are normal except for a proton distribution broader than expected Jan. 27, approx 6 UT begins a dense, hot solar wind with IMF showing flux-rope features. Jan. 27, at 1356UT forward fast IP shock compress structure at L1 (at ACE NRT) and proton density increases to above 100 part/cc, at 1500UT IP shock passes Wind (x-GSE ~ 0, y-GSE ~ -60 Re) Jan. 27, 1510UT polarity changes to outgoing from the Sun, and for several hours one GOES-Environmental satellite appears displaced away from the magnetosphere and into the magneto-sheath Jan. 27, 2322UT ACE crosses a reverse shock, WIND misses observation due to a data gap. 2322UT Jan. 27 - 0000UT Feb. 2, solar wind fluctuates, with a mean speed decreasing from its high of approximately 740 km/s to a value of about 500km/s at the end of the period. The recurrence of this CIR was identified by the spacecraft NEAR magnetometer at least in two occations. In this occassion when NEAR was located at about 90 Deg Longitude East of the Earth's location.
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Official NASA Contact: Mr. William Mish (wmish@istp1.gsfc.nasa.gov)
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Last Updated: 07/17/2000
