PHIVOLCS Earthquake Intensity Scale

Many people are frightened; many run outdoors. Some people lose their balance.

• INTENSITY V

• INTENSITY VI

• INTENSITY VII

• INTENSITY VIII

People are panicky. People find it difficult to stand even outdoors.

• INTENSITY VI

• INTENSITY VII

• INTENSITY VIII

• INTENSITY IX

People are forcibly thrown to ground.

• INTENSITY V

• INTENSITY VII

• INTENSITY IX

• INTENSITY X

Practically all man-made structures are destroyed.

• INTENSITY IV

• INTENSITY VII

• INTENSITY VIII

• INTENSITY IX

• INTENSITY X

Perceptible to people under favorable circumstances.

• INTENSITY I

• INTENSITY II

• INTENSITY III

• INTENSITY IV

Felt by many people indoors especially in upper floors of buildings.

• INTENSITY I

• INTENSITY II

• INTENSITY III

• INTENSITY IV

Generally felt by most people indoors and outdoors. Many sleeping people are awakened.

• INTENSITY I

• INTENSITY II

• INTENSITY III

• INTENSITY VI

• INTENSITY V

Felt generally by people indoors and by some people outdoors. Light sleepers are awakened.

• INTENSITY V

• INTENSITY IV

• INTENSITY III

• INTENSITY II

Felt by few individuals at rest indoors.

• INTENSITY I

• INTENSITY II

• INTENSITY III

• INTENSITY VI

• INTENSITY V

Many well-built buildings are considerably damaged. Concrete dikes and foundation of bridges are destroyed by ground settling or toppling.

• INTENSITY I

• INTENSITY III

• INTENSITY V

• INTENSITY VII

• INTENSITY VIII