Earthquakes - Earthquakes

Fault

A fracture in the Earth's crust through which movement has occurred.

Earthquake

A sudden and violent shaking of the ground caused by the movement of tectonic plates.

Hanging Wall

The side of a non-vertical fault that occurs above the fault plane.

Foot Wall

The side of a non-vertical fault that is found below the fault plane.

Seismic Activity

The occurrence and distribution of earthquakes in a region.

Pacific Ring of Fire

An area of intense seismic activity circling the Pacific Ocean characterized by volcanoes and frequent earthquakes.

Normal Faults

Faults with a fault plane angle of less than 45° where the hanging wall moves downward relative to the footwall.

Reverse/Thrust Faults

Faults with a fault plane angle greater than 45° where the hanging wall moves upward relative to the footwall.

Strike-Slip Faults

Faults that are nearly vertical with minimal inclination, where blocks move laterally.

Plate Boundaries

Regions where tectonic plates interact, most earthquakes occur here.

Seismic Waves

Waves that travel through the Earth, causing ground shaking and damage.

Active Faults

Faults that have experienced recent movement and pose a high risk for earthquakes.

Inactive Faults

Faults that haven’t moved in a long time but could still pose a potential risk.

Philippine Fault Zone

The major active fault system running through the Philippines.

Subduction Zone

Where the Philippine plate subducts beneath the Eurasian and Pacific plates, causing volcanic activity.

Transform Boundaries

Where the Philippine plate interacts with other plates, leading to strike-slip faults.

Convergent Boundaries

Regions where plates converge, forming complex, active fault systems.