Cracks in a road in Greymouth, after the 1929 Murchison earthquake, 1929. [Ref #: 1/2-091674-F Part of: West Coast Historical and Mechanical Society: Photographs (PAColl-5376)] The earthquake ...

The 1855 earthquake is the most severe earthquake to have occurred in New Zealand since systematic European colonisation began in 1840.

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 ...

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) ...

We get asked two questions a lot: what is an earthquake forecast and why do I need to know about them? GNS Science has been producing earthquake forecasts since the late 1990s, but it wasn’t until the ...

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 ...

One hazard we don’t often get an opportunity to talk about at GeoNet is landslides. That’s a good thing, we aren’t complaining. But with the M7.8 Kaikōura Earthquake, landslides and land deformation ...

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 ...

The Aviation Colour Code system is based on four colours and is only intended for use by the civil aviation community. The system is defined by the International Civil Aviation Organization(ICAO), and ...

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 ...

New Zealand’s tectonic setting in the Pacific puts us at risk from many different tsunami sources, some may be generated and arrive at our nearest coasts in less than an hour. To improve tsunami ...

The 27 August 1883 explosion of Krakatau Volcano in Indonesia is one example of an eruption-caused tsunami. The eruption generated a 30m tsunami in the Sunda Strait which killed about 36,000 people, ...