Simon Winchester, author of "Krakatoa: The Day the World Exploded," wrote a very interesting and provocative piece for this past Wednesday's New York Times Op-Ed page about last weekend's earthquake.

He suggested that a kind of global, subterranean "Butterfly Effect" might well be at work, to link and possibly make more understandable the extraordinary seismic events of the past year.

Here's his essay.

The Year the Earth Fought Back

Like two bookends of calamity, earthquakes at Bam in Iran and off Sumatra in Indonesia have delineated a year of unusual seismic ferocity - a year, one might say, of living dangerously.

Twelve months, almost to the very hour, before Sunday's extraordinary release of stress at the India-Burma tectonic plate boundary, a similar jolt at the boundary of the Arabian and the Eurasian Plates devastated one of the most celebrated of Persian caravan cities.

The televised images of Bam's collapsed citadel and the sight of thousands of bodies being carried from the desert ruins haunted the world then just as the images of the drowned around the shores of the Bay of Bengal do today.

But that has not been the half of it.

True, these two disasters were, in terms of their numbers of casualties, by far the most lethal.

But in the 12 months that separated them, there have been many other ruinous and seismically ominous events, occurring in places that seem at first blush to be entirely disconnected.

This year just ending - which the all-too-seismically-aware Chinese will remind us has been that of the Monkey, and so generally much prone to terrestrial mischief - has seen killer earthquakes in Morocco in February and Japan's main island of Honshu in October.

The Japan temblor left us with one widely published image - of a bullet-train, derailed and lying on its side - that was, in its own way, an augury of a very considerable power: no such locomotive had ever been brought low before, and the Japanese were properly vexed by its melancholy symbolism.

In America, too, this year there have been some peculiar signs.

Not only has Mount St. Helens been acting up in the most serious fashion since its devastating eruption of May 1980, but on one bright mid-autumn day in California this year the great San Andreas Fault, where the North American and Pacific Plates rub alongside one another, ruptured.

It was on Sept. 28, early in the morning, near the town of Parkfield - where, by chance, a deep hole was being drilled directly down into the fault by geologists to try to discern the fault's inner mysteries.

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