Special Note
Ask an Astrobiologist has received nearly a thousand questions about Nibiru and 2012, with more than 200 answers posted. Please read a summary of the answers that have already been posted, use the search feature and read the FAQ’s before submitting questions on these topics.
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Question
How do you determine sea level for the place you live?
Sea level on Earth is defined as the average height of the sea, not taking into account variations due to tides, waves, or storm surges. It is, by definition, the same everywhere -- a property of the planet as a whole, not of any one location. The altitude above (or below) sea level of any particular place on Earth is given on topographic maps or can be calculated with GPS receivers.
April 29, 2003
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