1. Ben Brooks James Foster, Cecily Wolfe David Sandwell, David Myer Mike Poland, Matt Patrick, Paul Okubo The Father’s Day 2007 Intrusion At Kilauea: Chickens, Eggs, Dikes, And Slow Earthquakes

2. So What ? Slow Earthquakes Being Recognized as Fundamental Part of the Seismic Cycle Cascadia, Japan, Mexico, Alaska, San Andreas, Hawaii Periodicity Observed Cascadia, Mexico, Hawaii No General Theory for Slow Earthquakes and/or Periodicity Rate & State Friction RSF modified by climatic fluctuations (Lowry, 2006) TODAY’s TALK: Review Kilauea Deformation and Slow Earthquakes Father’s Day Intrusion and Evidence For Slow Earthquake Stress Modeling  Explanation for Periodicity Due to Constant Stressing Rate

3. Cascadia Slow Earthquakes From Rogers&Dragert, 2003 From Miller et al., 2002

4. Seismicity (<10km) & CGPS Deformation 1997-2005 Kilauea Caldera SWRZ Hilina Slump ERZ HP

5. The Hilina Slump From Morgan et al., 2003 Owen et al, 2000 - Stable Sliding of Entire Decollement Cayol et al., 2000 - Decollement Locked seaward of EQs

6. Competing Models Cayol et al. 2000: EXPLAINS SEISMICITY

7. Magmatism & Stress From Cayol et.al, 2000  c  n

8. Time Series 774+/-7 Next SE Expected March 17, 2007

9. Slow Earthquakes: 2 Families Triggered Seismicity

10. Earthquake Counts – Western Events From Brooks et.al, 2006

11. Possible SE Sources & Triggered Seismicity From Brooks et.al, 2006

12. Coulomb Failure Stress from Slow Earthquakes From Segall et.al, 2000 BACKGROUND STRESSES ARE NEGLECTED

13. From Wolfe et.al, submitted

14. Earthquake Relocations From Wolfe et.al, submitted

15. Relocations: Cross Sections From Wolfe et.al, submitted

16. USGS & NSF Experiment: Feb – July, 2007 (USGS, UH, U Wisconsin, Stanford)

17. ALOS: Line of Sight

18. Competing Models

19. Far-field residuals close to zero

20. Slow Earthquakes & Dikes

21. Competing Models

22. Vertical Results

23. Vertical Results: June 2007

24. Tilt Meters

25. Periodic Slow Earthquake Comparison Guerrero data courtesy T. Lowry

26. From Sykes & Menke, 2006 Kilauea Cascadia Guerrero

27. An Explanation for Why and When ? WAOP HALR NUPM KTPM UWEV AHUP

28. ERZ O PENING (1998-Present) (Cortesy Katie Phillips, Dave Chadwell, SCRIPPS)

29. Stress Models

30. Constant Stressing Rate SE

31. Complete Stressing Cycle

32. So What ? Father’s Day intrusion triggered another Slow Earthquake at Kilauea Delayed, but still the most regular faulting event ever observed instrumentally (I think) The Cayol et al. (2000) model combined with a constant stressing rate provides a simple explanation of periodicity What’s next? Hope for a rate change along East Rift Zone to test the constant stressing rate hypothesis