By assuming, for this post-seismic slip, a source coplanar with the seismic rupture plane, we are able to place strong constraints on the down-dip extent and amplitude of the post-seismic slip by using only the dilatational strain data.
Constraints on the down-dip extent of the stress changes would relate near-complete stress drop to other observables, such as radiated energy (e.g., Lay et al. 2012) and seismological evidence for fluids (e.g., Audet et al. 2009), and inform physical models.
All methods have difficulty resolving the up-dip extent of rupture; onshore geodetic inversions have limited sensitivity to slip far offshore, seismic inversions have instabilities in seismic moment estimation as subfault segments get very shallow, and tsunami inversions average over the total region of ocean bottom uplift.
The fit of model curves to the data is surprisingly good considering that we determined the down-dip extent of rupturing and the slip amplitude solely from the strain data and that we imposed uniform slip over a rupture surface that is a simple rectangular shape.
where x i is the coordinate (m) of the measurement station, Δ ρ is the density contrast (kg.m-3), t is the thickness (m), θ is the dip angle (degrees) of the body measured anticlockwise, z is the depth (m) to the top, 2 Y is the strike length (m), L is the dipping extent (m) of the body, and γ is the gravitational constant (6.67384 × 10-11 m 3 kg −1 s-2).
The offshore seismic stations nearby MMF constrained the depth, dip, and lateral extent of the seismicity much better and, consequently, the geometry of the fault segments.
Britons are, to a certain extent, dipping into their savings to keep spending, which could hit household budgets further down the road.
Scientists at the National Snow and Ice Data Center (NSIDC) said that Arctic sea ice extent dipped for a short time in mid-November, an "almost unprecedented" event.
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Therefore, details of the slip models and fault geometry may differ considerably (e.g. down-dip and southern extent of the fault plane).
This July, the average sea ice extent dipped to the fourth lowest level recorded for the month.
