Blown to Bits; or, The Lonely Man of Rakata

by R. M. Ballantyne

The old Malay was right as to the cause, but wrong as to distance. Instead of being a volcano "close at hand," it was Krakatoa eviscerating itself a hundred miles off, and the sound of its last grand effort "extended over 50 degrees = about 3000 miles."

On that day all the gas lights were extinguished in Batavia, and the pictures rattled on the walls as though from the action of an earthquake. But there was no earthquake. It was the air-wave from Krakatoa, and the noise produced by the air-waves that followed was described as "deafening."

The effect of the sounds of the explosions on the Straits Settlements generally was not only striking, but to some extent amusing. At Carimon, in Java—355 miles distant from Krakatoa—it was supposed that a vessel in distress was firing guns, and several native boats were sent off to render assistance, but no distressed vessel was to be found! At Acheen, in Sumatra—1073 miles distant—they supposed that a fort was being attacked and the troops were turned out under arms. At Singapore—522 miles off—they fancied that the detonations came from a vessel in distress and two steamers were despatched to search for it. And here the effect on the telephone, extending to Ishore, was remarkable. On raising the tubes a perfect roar as of a waterfall was heard. By shouting at the top of his voice, the clerk at one end could make the clerk at the other end hear, but he could not render a word intelligible. At Perak—770 miles off—the sounds were thought to be distant salvos of artillery, and Commander Hon. F. Vereker, R.N., of H.M.S. Magpie, when 1227 miles distant (in lat. 5° 52' N. long. 118° 22' E.), states that the detonations of Krakatoa were distinctly heard by those on board his ship, and by the inhabitants of the coast as far as Banguey Island, on August 27th. He adds that they resembled distant heavy cannonading. In a letter from St. Lucia Bay—1116 miles distant—it was stated that the eruption was plainly heard all over Borneo. A government steamer was sent out from the Island of Timor—1351 miles off—to ascertain the cause of the disturbance! In South Australia also, at places 2250 miles away, explosions were heard on the 26th and 27th which "awakened" people, and were thought worthy of being recorded and reported. From Tavoy, in Burmah—1478 miles away—the report came—"All day on August 27th unusual sounds were heard, resembling the boom of guns. Thinking there might be a wreck or a ship in distress, the Tavoy Superintendent sent out the police launch, but they 'could see nothing.'" And so on, far and near, similar records were made, the most distant spot where the sounds were reported to have been heard being Rodriguez, in the Pacific, nearly 3000 miles distant!

One peculiar feature of the records is that some ships in the immediate neighbourhood of Krakatoa did not experience the shock in proportionate severity. Probably this was owing to their being so near that a great part of the concussion and sound flew over them—somewhat in the same way that the pieces of a bomb-shell fly over men who, being too near to escape by running, escape by flinging themselves flat on the ground.

Each air-wave which conveyed these sounds, commencing at Krakatoa as a centre, spread out in an ever-increasing circle till it reached a distance of 180° from its origin and encircled the earth at its widest part, after which it continued to advance in a contracting form until it reached the antipodes of the volcano; whence it was reflected or reproduced and travelled back again to Krakatoa. Here it was turned right-about-face and again despatched on its long journey. In this way it oscillated backward and forward not fewer than six times before traces of it were lost. We say "traces," because these remarkable facts were ascertained, tracked, and corroborated by independent barometric observation in all parts of the earth.

For instance, the passage of the great air-wave from Krakatoa to its antipodes, and from its antipodes back to Krakatoa, was registered six times by the automatic barometer at Greenwich. The instrument at Kew Observatory confirmed the records of Greenwich, and so did the barometers of other places in the kingdom. Everywhere in Europe also this fact was corroborated, and in some places even a seventh oscillation was recorded. The Greenwich record shows that the air-waves took about thirty-six hours to travel from pole to pole, thus proving that they travelled at about the rate of ordinary sound-waves, which, roughly speaking, travel at the rate of between six and seven hundred miles an hour.

The height of the sea-waves that devastated the neighbouring shores, being variously estimated at from 50 to 135 feet, is sufficiently accounted for by the intervention of islands and headlands, etc., which, of course, tended to diminish the force, height, and volume of waves in varying degrees.

These, like the air-waves, were also registered—by self-acting tide-gauges and by personal observation—all over the world, and the observations coincided as to date with the great eruptions of the 26th and 27th of August. The influence of the sea-waves was observed and noted in the Java sea—which is shallow and where there are innumerable obstructions—as far as 450 miles, but to the west they swept over the deep waters of the Indian Ocean on to Cape Horn, and even, it is said, to the English Channel.

The unusual disturbance of ocean in various places was sufficiently striking. At Galle, in Ceylon, where the usual rise and fall of the tide is 2 feet, the master-attendant reports that on the afternoon of the 27th four remarkable waves were noticed in the port. The last of these was preceded by an unusual recession of the sea to such an extent that small boats at their anchorage were left aground—a thing that had never been seen before. The period of recession was only one-and-a-half minutes; then the water paused, as it were, for a brief space, and, beginning to rise, reached the level of the highest high-water mark in less than two minutes, thus marking a difference of 8 feet 10 inches instead of the ordinary 2 feet.

At one place there was an ebb and flood tide, of unusual extent, within half-an-hour. At another, a belt of land, including a burying-ground, was washed away, so that according to the observer "it appeared as if the dead had sought shelter with the living in a neighbouring cocoa-nut garden!" Elsewhere the tides were seen to advance and recede ten or twelve times—in one case even twenty times—on the 27th.