Earthquakes at GNSEarthquakes at GNS

Kevin FenaughtyKevin Fenaughty

GeoNet Data Centre ManagerGeoNet Data Centre Manager

ContentContent

• Hypocentres: origin time, latitude, longitude and depth

• Magnitudes

• Standard errors and quality information

• “Felt” reports

StructureStructure

• Each event can have many locations

• Each location can have many magnitude determinations

• Each event has a prime estimate to flatten the data for most purposes

EVENT LOCATION MAGNITUDE

Major characteristicsMajor characteristics

• Stored in Oracle

• Real-time updates from a VMS client

• Publicly available from www.geonet.org.nz

UsersUsers

• In-house GNS staff

• World-wide research community

• Insurance industry

• Schools

UsesUses

• Plotting seismicity maps – generally the first step in any seismological study

• Looking for statistical trends: developing forecasting techniques

• Investigating damage claims

New New Zealand Zealand

deep deep seismicityseismicity

RelationshipsRelationships

• Earthquakes are linked to both the GNS landslide database and the active faults database

• Hypocentres above magnitude 3.7 are provided to the International Seismological Centre in the United Kingdom for their world-wide catalogue

Development plansDevelopment plans

• After July 2003, to make earthquake waveform data publicly accessible

• After January 2004, to allow “felt” reports to be made on-line by the general public

• Long-term: get into scientists’ “bottom drawers” for special studies

Volcanoes at GNSVolcanoes at GNS

Kevin FenaughtyKevin Fenaughtyon behalf ofon behalf of

Brad ScottBrad Scott

Volcano Surveillance CoordinatorVolcano Surveillance Coordinator

ContentContent

• Visual observations• Photographs• Lake, stream and spring temperatures• Water and gas chemistry• Volcanic earthquakes• Volcanic tremor• Ground deformation• Geology

Another day at the office…Another day at the office…

StructureStructure

• Much of the data is digital, but not in a relational database

• Apart from geology, most data can be organised as a time series

UsersUsers

• Direct users:– In-house GNS staff– World-wide research community

• Indirect users (value-added):– Local, regional and central government

agencies– The tourism and aviation industry– Media and the public

UsesUses

• Development of volcano monitoring techniques

• Quantifying volcano behaviour

• Eruption prediction

• Ashfall prediction for aviation industry

RelationshipsRelationships

• The collection of volcanic gas and water chemistry data will be added to the GNS groundwater database

• Lightning and wind information is supplied by MetService

Development plansDevelopment plans

• Use the same tables as the GNS groundwater database to store low-volume time series data

• Develop web-based graphical tools for displaying time series parameters

• Long-term: preserve the knowledge behind paper-based archives