What tectonic plates were involved in the 2004 tsunami?

The December 26, 2004 M=9.1 Sumatra-Andaman earthquake occurred along a tectonic subduction zone in which the India Plate, an oceanic plate, is being subducted beneath the Burma micro-plate, part of the larger Sunda plate.

What plates were involved in the Indonesian earthquake?

The January 15 event was a shallow crustal earthquake at the boundary between the Sunda plate and the Banda Sea microplate at a focal depth of 18 km. The earthquake occurred along the Mamuju–Majene thrust fault, which is known to be an active seismic source that has caused several deadly earthquakes in the recent past.

What type of plate boundary is Sumatra Indonesia?

Sumatran Subduction Trench
This plate boundary is called the Sumatran Subduction Trench, and it is where the oceanic Indian/Australian plate is slowly descending beneath (subducting under) the continental Eurasian plate at a rate of about 4.5 cm/year (2 inches/year).

What type of plate boundaries cause tsunamis?

Most large tsunamis occur at convergent plate boundaries where two tectonic plates are crashing into each other. As the two plates collide one plate is forced down underneath the other. As this happens the leading edge of the top plate snags on the bottom plate and pressure starts to build.

Is the Sunda plate oceanic or continental?

Tectonic plate and crust are slightly different concepts. So, The Sunda plate is mainly comprised of continental crust. There might be a bit of oceanic crust, but less. The convergence of the Indo-Australian plate with the Sunda plate is an oceanic-continental convergence.

What’s it called when one plate goes under another?

In some cases, however, a convergent plate boundary can result in one tectonic plate diving underneath another. This process, called “subduction,” involves an older, denser tectonic plate being forced deep into the planet underneath a younger, less-dense tectonic plate.

Where is Indonesia tectonic plate?

The tectonics of Indonesia are very complex, as it is a meeting point of several tectonic plates. Indonesia is located between two continental plates: the Australian Plate (Sahul Shelf) and the Eurasian Plate (Sunda Shelf); and between two oceanic plates: the Pacific Plate and the Philippine Sea Plate.

Is Indonesia on a tectonic plate?

What type of convergent boundary is Indonesia?

Weak Tectono-Magmatic Relationships along an Obliquely Convergent Plate Boundary: Sumatra, Indonesia. The tectono-magmatic relationships along obliquely convergent plate boundaries, where strain partitioning promotes strike-slip structures along the volcanic arc, are poorly known.

How do tectonic plates make tsunamis?

Subduction. Earthquakes that generate tsunamis most often happen where Earth’s tectonic plates converge, and the heavier plate dips beneath the lighter one. Part of the seafloor snaps upward as the tension is released. The falling debris displaces the water from its equilibrium position and produces a tsunami.