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State of the Planet

State of the Planet

Shaking From April’s New Jersey Quake Went Oddly Far, Raising Questions on Regional Hazard

State of the Planet
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A 4.8 earthquake struck northern New Jersey’s Tewksbury township on April 5 , it triggered widespread alarm.

It was the biggest since 1884 , when a quake of approximately magnitude 5 struck under the seabed off Brooklyn , cracking walls and toppling chimneys.

New study suggests why this happened, calling into question some assumptions about regional earthquake hazard.

The April 5 earthquake in New York City bounced back down and re-emerged further away in New England .

The long-distance echoes were strengthened by the fact that most rocks underlying this region are hard and dense, and conduct energy efficiently.

The area from Philadelphia to Connecticut has seen some 500 known quakes from the 1600s to the present.