Earth quake

• P-waves was discovered by Ingeh Lehmann
• The two man-made ground shaking Massive explosion and passing cargo tucks
• Hypocenter is located at the ground level
• The epicenter is located above the hypocenter
• Earth quake happens when energy built up by the application of stress
• The second term of P-waves is Compressional Waves
• Travels outwards from the epicenter called Surface-waves