2005GL023607.pdf (762.81 kB)

Slow slip on the northern Hikurangi subduction interface, New Zealand

Download (762.81 kB)
journal contribution
posted on 09.02.2021, 19:14 by A Douglas, J Beavan, L Wallace, John Townend
In October 2002, a surface displacement episode of 20-30 mm magnitude was observed over a ∼10 day period on two continuous Global Positioning System (GPS) instruments near Gisborne, North Island, New Zealand. We interpret this to result from slow slip on the northern Hikurangi subduction interface. Using ten years of regional campaign GPS (1995-2004) and recent continuous GPS data, we estimate the recurrence interval for similar events to be 2-3 yrs. In November 2004, a similar slow slip event occurred within this recurrence period. The 2002 event can be modeled by ∼18 cm of slow slip near the down-dip end of the seismogenic zone on the subduction interface offshore of Gisborne. The campaign GPS data show that the 2002 slow slip event had little effect on regional strain patterns. Copyright 2005 by the American Geophysical Union.

History

Preferred citation

Douglas, A., Beavan, J., Wallace, L. & Townend, J. (2005). Slow slip on the northern Hikurangi subduction interface, New Zealand. Geophysical Research Letters, 32(16), 1-4. https://doi.org/10.1029/2005GL023607

Journal title

Geophysical Research Letters

Volume

32

Issue

16

Publication date

01/01/2005

Pagination

1-4

Publisher

American Geophysical Union (AGU)

Publication status

Published

Contribution type

Article

ISSN

0094-8276

eISSN

1944-8007

Article number

L16305

Language

en

Exports