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Each weekday morning, OurAmazingPlanet takes the pulse of the Earth, reporting on natural phenomena and exploration news from around the globe.

California Tornado: An EF-0 tornado touched down in Maxwell, Calif., yesterday, the second tornado to hit the state in four days. California averages about 5 tornadoes each year. [Related: Rare Waterspout Seen Near San Francisco .]

Malibu Quake: A magnitude 3.3 earthquake shook Malibu, Calif., yesterday. No damage or injuries were reported.

Carbon Mission Scrapped: Japan's huge earthquake damaged an important research vessel, forcing scientists to call off a mission to a deep-sea coral bed.

Aftershocks Continue: Three strong aftershocks rocked Japan this morning, all within 90 minutes. [Related: Aftershock Blitz: Will Japan Ever Stop Shaking? ]

Antarctica in Color: On his expedition to Antarctica in 1914, Sir Ernest Shackleton brought an Australian photographer named Frank Hurley. See some of Hurley's color photos of the ill-fated mission. [Related: Race to the South Pole in Images ]

Previously on Our Daily Planet: Knut the Polar Bear Dies and an Earthquake in Afghanistan

Reach OurAmazingPlanet staff writer Brett Israel at Follow him on Twitter @btisrael.