Question

support cable north suspended mass marker rotating drum base anchored into bedrock and moves with it bedrock

• in waves that radiate outward from the ________
• what is liquefaction?
• when the ground ______, sandy materials saturated with water can behave like a ______ instead of solid ground
• ground may ________ or pull apart
• can cause ground ________ and ground failure such as landslides and flows
• the richter scale

Explanation:

For the first blank (in waves that radiate outward from the ______), in the context of seismic waves, they radiate from the focus (or epicenter) of an earthquake.
For the liquefaction section:

• When the ground shakes (during an earthquake), sandy materials saturated with water can behave like a liquid instead of solid ground (this is the definition of liquefaction - loss of shear strength in saturated soils during shaking).
• Ground may sink (or settle) or pull apart (due to the loss of strength and the soil acting as a liquid, it can compact or deform).
• Can cause ground settlement (or subsidence) and ground failure such as landslides and flows (liquefaction - induced ground movement can lead to subsidence and other failures).

Answer:

• In waves that radiate outward from the focus (epicenter)
• What is Liquefaction?
• When the ground shakes, sandy materials saturated with water can behave like a liquid instead of solid ground
• Ground may sink or pull apart
• Can cause ground settlement and ground failure such as landslides and flows