HAO Colloquium Series Presents Delores Knipp, CU Boulder

How We Got to Now (But Almost Didn’t): The May 1967 Great Storm and Solar Radio Disruption Event

Although listed as one of the most significant events of the last 80 years, the space weather storm of late May 1967 has been of mostly fading academic interest.  The storm made its initial mark with a colossal solar radio burst causing radio interference at frequencies between 0.01-9.0 GHz and near-simultaneous disruptions of dayside radio communication by intense fluxes of ionizing solar X-rays.  Aspects of military control and communication were immediately challenged.  Within hours a solar energetic particle event disrupted high frequency communication in the polar cap. Subsequently record-setting geomagnetic and ionospheric storms compounded the disruptions.  I explain how the May 1967 storm was nearly one with ultimate societal impact, were it not for the nascent efforts of the United States Air Force in expanding its terrestrial weather monitoring-analysis-warning-prediction efforts into the realm of space weather forecasting.   This story develops during the rapid rise of solar cycle 20 and the intense Cold War in the latter half of the 20th Century. We detail the events of late May 1967 in the intersecting categories of solar-terrestrial interactions and the political-military backdrop of the Cold War.  This was one of the “Great Storms” of the 20th century, despite the lack of large geomagnetically-induced currents.  Radio disruptions like those discussed here warrant the attention of today’s radio-reliant, cellular-phone and satellite-navigation enabled world.

Date and time: 
Wednesday, August 10, 2016 - 3:00pm to 4:00pm
South Auditorium