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Category: Recap

Earthquake Measurement – Lecture Notes

July 24th, 2014

I really enjoyed learning about the way that seismologists relate to earthquakes. Julian Lozos gave a talk at the Randall Museum on July 17th and here are my notes.

The best part was coming to understand how mathematical modeling is based on so many different measurements. And each measurement has its limits and peculiarities. I kinda also liked his confession that many seismologists believe the chaos in the system might permanently inhibit accurate quake predictions from ever being possible.

Hayes Valley debut a playful walc

May 13th, 2011

That was fun! My first tour of Hayes Valley turned out well, and there were even folks who loved the game we played—more than two dozen, in fact. Last weekend’s tour was different from a usual Thinkwalk.

This 1958 photo shows how narrow Geary was before the 1970s "redevelopment" of Geary into a wide boulevard with tall apartment buildings. Cross street is Webster.

Josh Bingham and Matt Garcia from WalkSF, our local pedestrian advocacy group, drew me into a madcap scheme to do something out of the ordinary. They suggested a […]

Taming the Weather with Intrepid Wigglers

December 15th, 2010

Take a look at this luck!

As always, I held off on canceling the tour on Tuesday. I hoped there would be a gap in the rain. I was right, but more than right, I was using a weather prediction system for local San Francisco short-term planning that I’ve now tested enough to share around. Feel free to pass the link along.

The tour ended at 2pm. At 2:20, this is how the oncoming rain looked, sweeping in from the west. Good timing!

The tour only had six people, but they all […]

Podcast of Watersheds Panel

November 19th, 2010

The recent (November 17) Shaping SF panel discussion at CounterPULSE was recorded and is posted here. If it’s been topped by more recent podcasts, search or scroll to “Watersheds Lost and Found: San Francisco, Guadalajara, Yuba.”

Me swimming at the South Yuba River

My part of it was the San Francisco part, of course, and I was joined by Derek Hitchcock of the South Yuba River Citizens League (SYRCL), and Sarah Kelly and Arthur Richards, co-directors of Adapting to Scarcity.

The Q&A was excellent and helped me to formulate my long-term concepts […]

Tour Recap: The Watersheds of Laguna Honda

November 16th, 2010

Joel sez: Here in Strybing Arboretum is where Golden Gate Park gets much of its water. The pumps are at the arboretum's lowest point, near Lincoln & 13th Ave.

You never know what kind of weather you are in for in San Francisco, but Sunday morning was amazingly warm and pleasant — the perfect day to walk and talk about water and the history of the city.

We started in Golden Gate Park, heading over to Stow Lake first, then down to the Botanical Garden, then up to the Laguna Honda Reservoir, […]