NEWS: Venezuela was struck by a seismic doublet—two powerful earthquakes of magnitude 7.2 and 7.5 near Yumare, about 160 km west of Caracas.

Seismic Doublet

• Consists of two earthquakes of similar magnitude occurring in quick succession from distinct but closely related fault ruptures.
• Unlike a normal earthquake sequence, where a major quake is followed by smaller aftershocks, a doublet involves two major earthquakes.

Cause

• The first rupture transfers stress to a nearby fault segment, triggering the second major earthquake.

Why is Venezuela Highly Seismic?

• Located along the Caribbean–South American Plate Boundary.
• Contains active strike-slip faults, including: Boconó Fault, San Sebastián Fault

Earthquake Basics

• Earthquake: Sudden shaking of the Earth's surface due to the release of energy when rocks slip along a fault.
• Hypocentre (Focus): Point inside the Earth where the rupture begins.
• Epicentre: Point on the Earth's surface directly above the hypocentre.

Major Earthquake-Prone Regions

• Pacific Ring of Fire
• Alpide Belt
• Caribbean Plate Boundary
• East African Rift System
• San Andreas Fault