Japan's Yomiuri Shimbun reports today on apparent precursors for the March 11 9.0 quake, including possible precursors about 50 miles (80 km) up in the ionosphere. Prof. Kosuke Heki of Hokkaido University, a researcher of geophysics, checked changes in the density of electrons in the ionosphere using electric waves from Global Positioning System satellites. He found the density over the epicenter rose by up to 10% compared with other areas 40 minutes before the magnitude-9 quake.
Masashi Hayakawa, professor emeritus of the University of Electro-Communications, believes the changes in the ionosphere started "about five days before the quake." Hayakawa, who researches the relationship between earthquakes and electromagnetic phenomena, said distortions in the ionosphere were detected by analyzing the transmission of radio waves in the air.
Seismic phenomena were not as useful as a precursor for this quake, they said. A "precursor slide," upon which Japan's warning system against a Tokyo quake is based, did not occur before the Great East Japan Earthquake, even though it has the same kind of plate boundary as in the Tokyo region.
Animal behavior precursors were noted but are not understood. About 50 small whales became stranded on the Ibaraki Prefecture coastline a week before the Great East Japan Earthquake, and other strange animal behavior was noted, but could not be definitively tied to the earthquake. This just adds to the long list of reasons why we should have a full scale investment into a Global Satellite precursor system and the impeachment of President Obama for hindering such a drive.