- 5 December 2019: Earthquakes on the Cascadia Fault may trigger earthquakes on the San Andreas Fault (Nature)
- 10 December 2019/ 20 January 2020: New evidence suggests Earth's magnetic field was present 3.7 billion years ago (Nature) - or perhaps even 4.2 billion years ago (Science)
- 13 January 2020: Brazil opens "spectacular" research base in Antarctica (Science)
