Apolaki Caldera
Also known as: Apolaki submarine caldera · Benham Rise caldera
Definition
The Apolaki Caldera is a massive submarine volcanic crater on the Benham Rise (Philippine Rise) underwater plateau off the eastern coast of Luzon, described in a 2019 study as the largest known caldera on Earth with a diameter of about 150 kilometers. It is named after Apolaki, the god of sun and war in Tagalog and Pangasinense mythology.
Identities
| Database | Identifier |
|---|---|
| Wikipedia | Apolaki Caldera |
| Wikidata | Q71889779 |
| DBpedia | N/A |
Also Known As
- Apolaki submarine caldera
- Benham Rise caldera
Examples and Analogies
If better-known calderas are compared to bowls, Apolaki is a stadium: Yellowstone’s caldera spans roughly 55 by 72 kilometers, while Apolaki’s roughly 150-kilometer crater dwarfs it, comparable in scale to the largest caldera complexes on the planet yet hidden more than a kilometer beneath the Pacific.
Usage Scenarios
The caldera is used in marine geology research on the tectonic history of the Philippine Sea Plate, cited in Philippine government efforts to document the resources of the Philippine Rise, referenced in discussions on the extended continental shelf claim, and featured in science communication showcasing frontier oceanography within national waters.
Strategies
Research strategy combines multibeam bathymetry mapping by research vessels, sediment sampling and seismic profiling to date eruptions and collapse events, and inter-agency cooperation between the University of the Philippines, national mapping agencies, and international partners to study a feature reachable only by deep-sea expedition.
Security and Safety Measures
The caldera lies in the protected Philippine Rise region where the government restricts foreign research and fishing activities; scientific work follows maritime safety protocols for deep-water expeditions, and resource assessments proceed under environmental safeguards given the ecological sensitivity of seamount ecosystems.
Historical Context
The feature was identified from bathymetric data gathered over decades and formally described in October 2019 by a team led by Jenny Anne Barretto, with collaborators from New Zealand; its naming after a war god honored indigenous mythology, and the announcement dovetailed with the Philippines’ successful United Nations validation of Benham Rise as part of its extended continental shelf in 2012 and the area’s 2017 renaming as the Philippine Rise.
Challenges and Controversies
Debate continues over the caldera’s exact origins and eruption history, since dating submarine volcanic events is difficult; geopolitically, the Philippine Rise’s strategic location and potential resources have made foreign access a sovereignty concern, and conservationists press for marine protected status ahead of any resource development.
Related Topic
Benham Rise