No. 206, "Negative Microwave Bursts," by Victor Grechnev and Hugh Hudson. Negative microwave bursts happen, in association with flares and with "Hyder flares," and modern instrumentation makes them very interesting again; See

http://sprg.ssl.berkeley.edu/~tohban/wiki/index.php/Negative_Microwave_Bursts

Older Nuggets are available at

http://sprg.ssl.berkeley.edu/~tohban/wiki/index.php/RHESSI_Science_Nuggets
(the current series, 2008-present), and at
http://sprg.ssl.berkeley.edu/~tohban/nuggets/ (the original series, 2005-2008).

We publish these at roughly two-week intervals and welcome contributions, which should be related, at least loosely, to RHESSI science.