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Lightning in the volcano cloud over Surtsey, Iceland, at 1925 to 1926:30 hours, Icelandic Mean Time on 1 December 1963 (90-second exposure). The altitude (top of the picture) over Surtsey is estimated to be about 8 kilometers. See page 1179. [S. Jo´nasson]


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Science. ISSN 0036-8075 (print), 1095-9203 (online)