Alert: Geomagnetic Disturbances - Aug. 4

Presto Alert Fast warning for important solar events with implications for the space environment. Source SIDC (RWC-Belgium) Frequency ASAP, when needed Format Plain text Mail header PRESTO ALERT SIDC code presto Latest issue :Issued: 2010 Aug 02 1247 UTC : Product: documentation at  http://www.sidc.be/products/presto    # FAST WARNING 'PRESTO' MESSAGE  from the SIDC (RWC-Belgium) # Solar activity is expected to be mostly quiet with possible risks of C class flares from NOAA AR 1092.   Geomagnetic acvity is expected to be unsettled to active by the end of Aug. 2nd due to the arrival of a halo CME linked to the long duration event of Aug. 1st.   Coronagraphic observations show actually a  complex CME event, with a fast component linked  to the flaring event of  NOAA AR 1092 (C class flare)  and subsequently, a slower component linked to a polar  crown filament eruption, to the north of this active region. SWAP observations show that the fast component  might not be completely Earth directed.  Arrival of the CME at the Earth orbit is expected  for the end of Aug. 2nd.  The filament eruption seems more favorable in  terms of geomagnetic effects, and is expected to  trigger geomagnetic disturbances on Aug. 4.  #----------------------------------------------------------- # Solar Influences Data analysis Center - RWC Belgium  Royal Observatory of Belgium   # # Fax : 32 (0) 2 373 0 224 # # Tel.: 32 (0) 2 373 0 491 # # # # For more information, see http://www.sidc.be. Please do not reply # # directly to this message, but send comments and suggestions to # # 'sidctech@oma.be'. If you are unable to use that address, use # # 'rvdlinden@spd.aas.org' instead. # # To unsubscribe, visit http://sidc.be/registration/unsub.php # #--------------------------------------------------------------------# Details Not available yet.  Check the ISES code book for information on ISES codes.

THE NATURE OF WORLDWIDE GEOMAGNETIC DISTURBANCES GENERATED BY THE STARFISH EXPLOSION OF JULY 9, 1962

THE RING CURRENT, GEOMAGNETIC DISTURBANCE, AND THE VAN ALLEN RADIATION BELTS

EXCESS RADIATION AT THE PFOTZER MAXIMUM DURING GEOPHYSICAL DISTURBANCES + AN APPARENT RELATIONSHIP BETWEEN GEOMAGNETIC DISTURBANCES AND CHANGES IN ATMOSPHERIC CIRCULATION AT 300 MILLIBARS

GEOMAGNETIC DISTURBANCES, A Collection of Articles, Translation of "Geomagnitnyye vozmushcheniya. Sbornik statey." From IGY Program, Section III, No. 4, 1960, Academy of Sciences, USSR: NASA TECHNICAL TRANSLATION, NASA TT F-105.

AURORAL-ZONE OBSERVATION OF INFRASONIC PRESSURE WAVES RELATED TO IONOSPHERIC DISTURBANCES AND GEOMAGNETIC ACTIVITY

INFLUENCE OF SUNSPOTS ON GEOMAGNETIC DISTURBANCE

THE PREDICTION OF GEOMAGNETIC DISTURBANCE INDICES, 1. THE ELIMINATION OF INTERNALLY PREDICTABLE VARIATIONS

THEORY OF THE GEOMAGNETIC DAILY DISTURBANCE VARIATIONS

Typical ionospheric, magnetic, and infrasonic disturbances observed during principal geomagnetic storms (ESSA technical memorandum RLTM-SDL)

Effects of geomagnetic disturbances on electric power transmission systems
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