Geophysical Research Letters

Correction to “Current deformation rates and extrusion of the northwestern Okhotsk plate, northeast Russia”

Authors

Errata

This article corrects:

  1. Correction to “Current deformation rates and extrusion of the northwestern Okhotsk plate, northeast Russia” Volume 36, Issue 2, Article first published online: 22 January 2009

[1] In the paper “Current deformation rates and extrusion of the northwestern Okhotsk plate, northeast Russia” by D. Hindle et al. (Geophysical Research Letters, 33, L02306, doi:10.1029/2005GL024814, 2006), because of an error in a subroutine, the strain rates calculated from the pure contraction and smooth extrusion models and from GPS data should be corrected according to Table 1. All other data, including the seismic strain rate, and all velocities from the models remain the same. Figure 3 is redrafted with the corrected strain rate axes. The corrected model strain rates (∼5.0 × 10−9 yr −1) and orientations (∼062°) nevertheless remain broadly the same. Both principal axes from the pure contraction model are compressional, whilst the largest principal strain rate component in the smooth extrusion model is contractional. The principal strain rates from GPS data are slightly higher, with the orientation of the contractional strain component (∼085°) broadly comparable to model results and seismic strain.

Figure 3.

Redrafted Figure 3 from the original article. Model and observed strains and velocities in OK. (a) Pure contraction model of OK. Velocity vectors are shown across the polygon where strain rate is calculated. Principal strain rate axes are red inward (contractional) or blue outward (extensional) arrows. (b) Smooth extrusion model. (c) Rigid extrusion model. (d) GPS strain rate from GPS vectors bounding and within box shaped region shown (see auxiliary material). (e) Seismic deformation rate, based on focal mechanisms (see auxiliary material). Strain rate data listed in Table 1.

Table 1. Strain Rates Calculated for Okhotsk Plate Apex Region, Giving Contraction, Extension Magnitudes, Degrees Clockwise From North of Contraction Axis and a Vertical Thickening Parameter Calculated to Conserve Volumea
DataContraction (yr−1)Extension (yr−1)Cont. Azi. (° From N.)Vert. Thick. (yr−1)
  • a

    Confidence limits for approximate 1σ variations of EU-NA pole and angular velocity.

Model
contr.−5.8±1 e-9−4.9±3 e-1062±16.3±1.4 e-9
smo. ext.−3.5±1 e-93.0±0.6 e-962±1
rig. ext.
Obs.
GPS−3.7 e-96.1 e-985−2.4 e-9
Eq.−3.8 e-103.5 e-10812.6 e-11

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