A ’64 Quake Still Reverberates

‘When a strong earthquake rocked northern Chile on April 1, scientists were quick with an explanation: It had occurred along a fault where stresses had been building as one of the earth’s crustal plates slowly dipped beneath another. A classic low-angle megathrust event, they called it.

Such an explanation may seem straightforward now, but until well into the 20th century, scientists knew relatively little about the mechanism behind these large seismic events. But that all changed when a devastating quake struck south-central Alaska on March 27, 1964, nearly 50 years to the day before the Chilean quake.’ (NYTimes).

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