- How much horizontal slip did the United States Geological Survey measure along the San Andreas Fault after the 1906 earthquake?
- Why did the mayor's office initially blame the fires rather than the earthquake for the destruction?
- What did the State Earthquake Investigation Commission report accomplish for the field of seismology?
Accidents and Disasters
Notable technological and industrial accidents and disasters.
- How did the Haber-Bosch process end up serving both fertilizer production and explosives manufacturing?
- What did White Star Line actually claim about the Titanic's watertight compartment design, versus the myth of 'unsinkable'?
- Why was the Titanic carrying fewer lifeboats than her capacity permitted?
- What safety measures did the 1914 International Convention for the Safety of Life at Sea introduce after the disaster?
- Why does a branching ratio determine whether a reaction burns steadily or detonates?
- What historical events does The Grapes of Wrath dramatize about the Dust Bowl migration to California?
- Why did a pure-oxygen cabin atmosphere make the Apollo 1 test so dangerous once a spark occurred?
- What sequence of technical failures caused the Soyuz 1 capsule to crash during re-entry?
- What caused the oxygen tank inside Apollo 13's service module to rupture on 13 April 1970?
- Why did British Airways and Air France launch Concorde's supersonic service simultaneously in January 1976?
- How fast and how high did the Concorde cruise compared to a normal passenger jet?
- Why did the Concorde's fuselage physically stretch by up to 30 centimetres during flight?
- Why was Concorde retired in 2003 despite its speed record never being matched by another passenger aircraft?
- What mechanical fault and human response combined to cause the partial meltdown at Three Mile Island?
- What did independent analyses find about cancer rates near Three Mile Island after the accident?
- How did the release of 'The China Syndrome' affect public perception of the accident?
- What triggered the collapse of Mount St. Helens' north face on the morning of May 18, 1980?
- Why did the collapse of the volcano's north face produce a lateral blast rather than a typical vertical eruption?
- What happened to volcanologist David Johnston during the eruption, and what was his final radio message?
- How did the 1980 Mount St. Helens eruption change how scientists assess volcanic eruption risk?
- What search strategy did Robert Ballard use to locate the Titanic instead of a systematic grid search?
- In what condition was the wreck found, and how did the bow and stern come to be separated?
- Why was the U.S. Navy funding an expedition that ended up locating the Titanic?
- What objects did the ROV Argo's images reveal scattered across the ocean floor around the wreck?
- What was the Chernobyl safety test on the night of 25-26 April 1986 actually trying to verify?
- How did a delay in the test and an unbriefed night shift contribute to the reactor becoming unstable?
- What design flaw in the RBMK reactor allowed power to surge to roughly a hundred times its rated output in a fraction of a second?
- Why has the town of Pripyat remained uninhabited since April 1986?
- How fast and how high did Concorde cruise compared to a standard passenger jet?
- What economic factors made Concorde's operations difficult despite decades of service?
- How did the 2000 Air France crash and the post-9/11 travel decline lead to Concorde's retirement?
- Why did sodium chlorate, used to kill ragwort, make New Zealand farmers' trousers combustible?
- What documented case did James Watson build his historical account around?
- What everyday hazards could set the treated fabric smouldering or detonating?
- What experience during the Chernobyl disaster inspired Bodnar to design the device?
- Why did the invention receive renewed attention after the Fukushima Daiichi disaster?
- What caused the Deepwater Horizon blowout on 20 April 2010?
- Which engineering interventions failed before the relief well finally sealed the leak?
- How much oil was released and how does it compare to other marine spills?
- Why did the Ig Nobel committee include BP among the Chemistry prize recipients?
- How did the dispersant Corexit change the behaviour of the spilled oil?
- How much oil was released during the 87-day Deepwater Horizon blowout?
- How did childhood exposure to natural disasters correlate with CEOs' later risk appetite?
- What kind of history does Alexievich's work record that encyclopedias leave out?
- How did Volkswagen's defeat device software detect that a car was undergoing an emissions test?
- How much higher were real-world nitrogen oxide emissions compared to the legal limit?
- How many vehicles worldwide were affected by the defeat device software?