![]() Earthquake activity: Derry-area historical earthquake activity is significantly above Pennsylvania state average. On, a category F4 tornado 20.0 miles away from the borough center injured 5 people and caused $6 million in damages. wind speeds 207-260 mph) tornado 20.0 miles away from the Derry borough center injured 140 people and caused between $50,000,000 and $500,000,000 in damages. It adjusts for the number of visitors and daily workers commuting into cities.ĭerry-area historical tornado activity is slightly below Pennsylvania state average. The crime index weighs serious crimes and violent crimes more heavily.
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