Monitoring active volcanoes requires the use of several complementary techniques to ‘take the pulse of a volcano’. Collectively, this is known as volcano monitoring. The techniques we use to monitor ...

Strong-motion accelerometers are located in major centres of population, near significant faults, or in different types of building structures. They are capable of measuring very strong shaking ...

Map and search of GeoNet sensor networks that deliver high-rate-data. Use the date search filter to see sensors that were operating in the past. More detailed station/sensor information can be ...

A selection of dramatic images from New Zealand's volcanic centres. Green Lake, Raoul Island. Macauley Island, Kermadecs. After the March 2006 eruption, Raoul Island. Gas sampling, Ngauruhoe.

The timestamp shown at the top right of the images is the time when the images were last refreshed. The previous 36 hours of sea level variations from all operational sites are displayed, oldest to ...

Keep an eye out for slow-slip events or "silent" earthquakes showing up on our GNSS instruments.

The M W 9.5 Chilean earthquake that occurred on 23 May 1960, 7:11 pm (NZST) is the largest earthquake instrumentally recorded to date. Its main shock generated a tsunami that was not only destructive ...

The NZ Volcanic Alert Level system is based on 6 levels and is intended to describe the current status of each active volcano. People who need volcano related information ranges from local residents, ...

The timestamp shown at the top right of the seismograph drum shown above is the time when this image was last refreshed. The previous four hours (240 minutes) of seismic signals (also known as traces) ...

Structural arrays consist of multiple sensors within a building or structure. They provide data to help engineers understand how the structure responds to shaking or vibration. The GeoNet building ...

An interactive, multi-layered map displaying the peak strong motion data that GeoNet collected during the last hour. Select a site to view the PGA (g), PGV (cm/s) and MMI values. Sites are coloured to ...

Felt earthquake reports are quantified using the New Zealand Modified Mercalli (MM) intensity scale. The MM scale grades the impact of an earthquake on people living on the earth's surface, and so can ...