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Location: almost directly beneath Helena. Affected area: 363,000 square kilometers. Damage: $4 million. A series of earthquakes beginning on October 3, 1935, shook the area. The strongest of the...
Search relevance: 1.00 | Views last month: 3 | Catalog Last Checked: August 02, 2026 at 05:15 PM -
Location: east of Helena. Affected area: 803,000 square kilometers. Damage: $0.3 million. Chimneys fell in every direction from the shaking. In addition, brick and mortar structures were damaged....
Search relevance: 1.00 | Views last month: 3 | Catalog Last Checked: August 02, 2026 at 05:14 PM -
The magnitude 7.1 earthquake killed 28 people and caused $11 million property damage. Affected area: 1,554,000 sq km
Search relevance: 1.00 | Views last month: 2 | Catalog Last Checked: August 02, 2026 at 05:13 PM
