1. Norris subsidence Caldera-wide uplift Figure 1 – ENVISAT beam mode 1 interferogram spanning 2004-2005 and showing deformation in the region of Yellowstone caldera. Outer dashed line is the boundary of the national park, and inner dashed line shows the caldera boundary. Yellow lines are roads and black lines are faults. The interferogram shows subsidence in the Norris region, which the entire caldera is uplifting.

2. Figure 2 – Averaged InSAR image from track 229 created by stacking all unwrapped 1-year interferograms from the 1992-2005 time period. The deformation histories for several points are shown for both track 229 and 501 interferograms. The most significant deformation is shown by Points 19, 6 and 14 (on the left side of the image), which exhibit subsidence ranging from 19 cm to 37 cm during the 13-year interval. We attribute this deformation to thermoelastic contraction of the 1986 pyroclastic flow deposits. The graphs on the right side of the image give the deformation history for points 11, 16 and 17, which show a small amount of LOS shortening (5-6 cm) over the east flank of the Augustine Island. The graphs at the bottom of the image show little deformation on the south and west sides of Augustine Island. Blue lines are the best second-order polynomial fits to the observed LOS displacements.

3. Figure 3 – ERS-1/2 track 156 interferometric stack spanning the pre-eruptive 1992–2001 period. The image shows three areas of subsidence in the debris avalanche deposit (labeled by number), but no volcano-wide deformation.

4. Figure 4 – Observed InSAR LOS displacements (A), along with predicted (B) and residual (C) deformation based on a model that assumes a point source of volume decrease (shown by red circle) at 12 km depth beneath Mount St. Helens.

5. Figure 5 - ENVISAT beam mode 7 track 451 interferogram spanning September 16, 2005, to July 28, 2006. The interferogram is dominated by inflation of Kilauea’s summit region.

6. Figure 6 – ENVISAT beam mode 2 interferogram of Fourpeaked volcano, Alaska, spanning July 11 to September 19, 2006. No volcano-wide deformation is apparent, despite the presence of magma within a few kilometers of the surface by September 17, 2006 (based on explosive activity and gas emissions). Fringes to the north of Fourpeaked are probably atmospheric artifacts.

7. Figure 7 – ENVISAT beam mode 2 interferogram spanning May 10 to June 14, 2006. Numerous fringes along the south coast of Java appear to be associated with deformation that accompanied the M6.3 earthquake of May 27. Earthquake-related subsidence also appears to have occurred in the city of Yogyakarta.