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In 1933, a great unpredicted meteor shower was seen from Europe that surprised astronomers. Dr. W.J. Fisher, a Harvard astronomer, identified the Giacobini-Zinner comet as the cause. This minor periodic comet was only sparsely the cause of meteors in the past, and would otherwise be little noticed by the astronomical observers. A hundred "shooting stars" a minute were reported from the Soviet observatory at Pulkovo, near Leningrad. Though short-lived, this exceeded in brilliance the showers of 1833 and 1866, Lasting only a few hours, its maximum came at about 20:00 GMT. It was regarded as one of the major meteoric displays of history, resulting from stray fragments of comet burning up in Earth's upper atmosphere.