The USGS has upgraded the Sumatran quake to magnitude 9 from 8.9.
This may not sound much, but because the magnitude scale is logarithmic it means a much larger impact and release of energy.
The USGS has upgraded the Sumatran quake to magnitude 9 from 8.9.
This may not sound much, but because the magnitude scale is logarithmic it means a much larger impact and release of energy.
