Problem: How to keep kitchen upper cabinet doors closed during an earthquake
My solution: Two extra strong, high magnetic catches per door
My wife and wanted to keep our kitchen upper cabinet doors closed during an earthquake, but also to minimize the inconvenience of opening the cabinet doors multiple times per day.
My solution was to install a pair of "Extra Strong, High Magnetic Catch" on each door. A single magnetic catch did not seem very strong, but two together require a firm pull to open the door. This allows the usual opening motion of pulling the door handle, and avoids the extra motion of lifting or otherwise releasing a different kind of catch. Also, this approach enables the slow-closing mechanism to operate unchanged.
The wood in our cabinets was too strong for me to drill holes for the screws supplied with the catches. So, I used Gorilla Glue for the magnets on the cabinet frame, and Scotch Extreme Mounting Tape for the strikes on the cabinet doors. Both are holding quite strongly. (The mounting tape did not hold as well for the magnets on the cabinet frame.)
Only time will tell if these hold up during a strong earthquake.