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Craterlets formed during the Calabrian earthquake of 1783.

Craterlets

Craterlets formed during the Calabrian earthquake of 1783.

On August 31, 1886, Charleston was nearly destroyed by an earthquake measuring 7.5 on the Richter scale that was felt as far away as Boston and Bermuda.

Results of the Earthquake in Charleston S.C., Aug. 31, 1886

On August 31, 1886, Charleston was nearly destroyed by an earthquake measuring 7.5 on the Richter scale…

Model of a part of the path traveled by a particle on the earth's surface during the earthquake of Tokyo, January 15, 1887.

Earthquake Path

Model of a part of the path traveled by a particle on the earth's surface during the earthquake of Tokyo,…

The Lisbon earthquake of 1755. It destroyed a great part of the city and its 60,000 inhabitants.

Lisbon Earthquake

The Lisbon earthquake of 1755. It destroyed a great part of the city and its 60,000 inhabitants.

Shifts in the two obelisks in the convent of St. Bruno, Calabrian earthquake of 1783.

Obelisk Shifts

Shifts in the two obelisks in the convent of St. Bruno, Calabrian earthquake of 1783.

"And the jailor, being roused out of sleep and seeing the prison doors open, drew his sword and was about to kill himself, supposing that the prisoners had escaped. But Paul cried with a loud voice, saying, Do thyself no harm: for we are all here. And he called for lights and sprang in, and, trembling for fear, fell down before Paul and Silas, and brought them out and said, Sirs, what must I do to be saved?" Acts 16:27-30 ASV <p>Illustration of the jailer kneeling on one knee at Paul's feet in the jail. Paul stands above him with arms open and Silas is sitting on a bench leaning toward and reaching out for the jailer. A lamp is burning on the ground next to the jailer's sword. The door to the jail is in the corner.

Paul and Silas in Jail - the Jailer Kneels Before Paul

"And the jailor, being roused out of sleep and seeing the prison doors open, drew his sword and was…

One of the seismograms of the Messina earthquake of December 28, 1908, as registered at Gottingen, Germany.

Seismogram

One of the seismograms of the Messina earthquake of December 28, 1908, as registered at Gottingen, Germany.

Diagrammatic view, from above, of a seismograph.

Seismograph

Diagrammatic view, from above, of a seismograph.

The Ewing seismograph, constructed to record all three movements. Three pendulums are arranged to swing in the manner of a bracket or a gate, in three planes, at right angles to one another. Two of them are placed vertically and oscillate in a horizontal manner.

The Ewing Seismograph

The Ewing seismograph, constructed to record all three movements. Three pendulums are arranged to swing…

"Seismoscope. a, heavy mass supported by loop at point near center of gravity; b, point on which upper side of loop rests; c, long needle projecting from upper side of loop; d, conducting-wire; e, binding-post; f, long arm of lever pivoted at k; g, point where end of lever rests on end of needle; h, mercury-cup." -Whitney, 1911

Seismoscope

"Seismoscope. a, heavy mass supported by loop at point near center of gravity; b, point on which upper…