In recent years the significant progress in satellite-based observations
of plasma states and associated electromagnetic phenomena in space has
resulted in the accumulation of much evidence of various plasma
instabilities. Today plasma instabilities are believed to be responsible
for electromagnetic radiation as well as for many of the macroscopic
dynamics of plasmas in space. Most students who begin to study plasma
physics are intrigued by the unstable nature of plasmas compared with
other states of matter; however, they often become frustrated because
there are so many in- stabilities. Such frustration explains in part why
there is no textbook which treats this subject exclusively. A
description of plasma instabilities in a systematic way is nontrivial
and takes a pertinacious effort. This book is an attempt to provide a
basic introduction on the subject and covers most of the important
instabilities. However, the author must apologize for any omission of
references to contributions of individuals who deserve more credit. The
reader is assumed to have a general knowledge of plasma physics
obtainable in an undergraduate course. The book is intended to be used
as a reference text on the subject of plasma instabilities at the under-
graduate level as well as for a text in a special course in graduate
school. Because the book is part of a series on physics and chemistry in
space, emphasis is placed on plasma instabilities relevant in space
plasmas.