About Giggenbach
Giggenbach is a stratovolcano rising to -65 meters (-213 feet) in New Zealand's Tonga-Kermadec Volcanic Regions. No historical eruptions have been recorded, though the volcano is classified based on geological evidence of past activity.
Geography & Climate
Giggenbach is located in New Zealand, within the Middle Kermadec Volcanic Arc of the broader Tonga-Kermadec Volcanic Regions. Situated at 30.04° S, 178.71° W in the Southern Hemisphere, the volcano lies within a subtropical climate zone. With an elevation of -65 meters — below sea level — Giggenbach is a submarine or submerged volcanic feature. Submarine volcanoes make up the majority of Earth's volcanic activity, though most eruptions go unobserved beneath the ocean surface. The volcanic landform is characterized as a composite, which describes the physical shape and structure of the volcanic edifice as observed from the surface.
Geological Context
Giggenbach sits in a subduction zone, where one tectonic plate dives beneath another, creating intense heat and pressure that generates magma. Subduction zones are responsible for many of the world's most explosive volcanoes and deadliest eruptions. For communities in New Zealand near Giggenbach, this tectonic setting means the volcano is capable of producing powerful explosive eruptions, pyroclastic flows, and lahars that can threaten populated areas within tens of kilometers of the summit. The dominant rock type is basalt / picro-basalt, a dark, fine-grained volcanic rock that forms from rapidly cooling, low-viscosity lava. Basaltic eruptions tend to be less explosive and produce fluid lava flows that can travel long distances. While less immediately dangerous than explosive eruptions, basaltic lava flows can destroy structures and infrastructure in their path, and volcanic gases released during these eruptions can affect air quality over a wide area.
GVP Reference Summary
Giggenbach, named after volcano gas geochemist Werner Giggenbach, is a basaltic-to-dacitic submarine volcano about 30 km NW of Macauley volcano. The flat summit reaches to within 65 m of the ocean surface, has a 700-m-wide crater containing a central cone, and is cut by numerous small explosion pits and craters. Much of the edifice is covered by dacitic pumice, and several edifice-collapse scarps cut its flanks. Large cones are found on the ENE and SSW flanks, and a chain of eight small cones that fed recent andesitic-dacitic lava flows lies on the west flank. A large hydrothermal vent field was found within the summit crater.
— Smithsonian Institution, Global Volcanism Program
0 Recorded Eruptions
No eruption records available for Giggenbach.
Real-Time Data
USGS Alert Level
Thermal Anomalies
Frequently Asked Questions About Giggenbach
Is Giggenbach an active volcano?+
Giggenbach is not currently classified as active. Its activity evidence is listed as "Unrest / Holocene." No recorded eruptions have been documented. However, no volcano is ever considered permanently extinct.
How high is Giggenbach?+
Giggenbach has a summit elevation of -65 meters (-213 feet) above sea level. With an elevation of -65 meters (below sea level), this is a submarine or submerged volcanic feature.
What type of volcano is Giggenbach?+
Giggenbach is classified as a Stratovolcano. Stratovolcanoes (also called composite volcanoes) are steep, conical volcanoes built up by many layers of hardened lava, tephra, and volcanic ash. They are among the most common and dangerous types, known for explosive eruptions.
Where is Giggenbach located?+
Giggenbach is located in New Zealand, in the Tonga-Kermadec Volcanic Regions. More specifically, it lies within the Middle Kermadec Volcanic Arc. Its exact coordinates are -30.036° latitude, -178.712° longitude.
Is it safe to visit Giggenbach?+
Giggenbach can generally be visited, but as with any volcano, visitors should check local conditions and any advisory notices before traveling. New Zealand may have specific regulations for accessing volcanic areas. Guided tours are often the safest and most informative way to experience a volcano.
