GeoNet: Strong Motion Map

FITS Deprecation Notice.
The FITS data base is being deprecated on the 31st March 2025.
The data is being migrated to Tilde and will be available through the API and visualization interfaces.
You can check on the status of the different data sets on our FITS System Deprecation: Transition to Tilde API page.

As of February 2020, all GeoNet strong motion sites are streaming in continuous 200Hz (channels HN). On 15 May 2020, all 50Hz strong motion continuous streams were turned off (channels BN). Please adjust any scripts as required. See HERE for more information.

As of October 2020, changes were made to the FDSN webserver data select service. The parameters starttime and endtime are now mandatory. Please adjust any scripts as required.

Strong Motion Data Map

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 reflect the level of shaking based on MMI.

Interactive Map showing GeoNet strong motion data

Rapid Strong Motion Data

The maximum horizontal PGA or PGV is taken as the maximum of the two horizontal components.
A symbol might be absent for the following reasons: 1) no data was received from the site in the last hour, or 2) if the site has been blacklisted due to unacceptable levels of noise.
These values are calculated in near real-time and can be affected by shaking from non-earthquake sources, such as noise. Please read our disclaimer.
Changes in metadata can also create anomalous readings. We are working on our change control procedures to reduce the likelihood of this occurring.
The continuous monitoring of PGA and PGV is based on work by Kanamori et al. (1999)
The calculations of MMI are based on the NZ equation of Moratalla et, al. (2020)
A suite of strong motion data products are available for earthquake events. These are accessible from the Strong Motion Tool.