as if tered some kind ofbarrier. From t ter a Croatianseismologist named Andrija Moudying grapiced a similar odd deflection, but at a s and tely belole; tinuity, or Mo.

    e o get a vague idea of terior—t really  until 1936 did a Danisist named Inge Leudyingseismograp t o be solid and an outer one (t Oldected) tis t to be liquid and t of magnetism.

    At just about time t Leanding of terior by studying ts at Calteco make comparisons bet. ter and Beno Gutenberg, t o do  at once as Ric o do ereit fello al“tude Scale.”)ter scale ood by nonscientists, ttle less so nos early days o Ricen asked to seeed scale, t rary measure of tremblings based on surfacemeasurements. It rises exponentially, so t a 7.3 quake is fifty times more poimes more pohquake.

    At least tically, t for an earto t, a lo. t says not damage. A magnitude 7quake le—say, four  cause no surfacedamage at all, ation. Mucoo, depends on ture of tion, ty of aftersting of ted area. All t t fearsome quakes are not necessarily tforceful, ts for a lot.

    t eartion ered on Prince illiam Sound in Alaska in Marcer scale, or one in t of Cially logged at 8.6 magnitude but later revised upies(including ted States Geological Survey) to a truly grand-scale 9.5. As you  al science, particularly ing readings from remote locations. At all events, bot only caused al Sout also set offa giant tsunami t rolled six to more victims as far ahe Philippines.

    For pure, focused, devastation,  intense eartory  struck—and e