The wonders of the world

by John Loraine Abbott

EARTHQUAKE AT LISBON.

At Oporto, the earthquake was felt with great violence. The river continued to rise and fall five or six feet, for four hours; the houses of the city were rocked as if by convulsions, and the earth was seen to heave up. St. Ubes, twenty miles distant, was entirely swallowed up by the repeated shocks, and by the vast surf of the sea. And at Cadiz it was so violent, that, but for the great solidity of the buildings, everything would have been destroyed. Those who had quitted the houses and churches, seeking safety in the open air, had scarcely recovered from their first terror, when they were plunged into a new alarm. At ten minutes after eleven o’clock, a wave was seen coming from the sea at the distance of eight miles, and at least sixty feet higher than usual. It dashed against the west part of the city, which is very rocky. Although its force was much broken by these rocks, it at length reached the walls, and beat in the breastwork, which was sixty feet above the ordinary level of the water, removing pieces of the fabric, of the weight of eight or ten tuns, to the distance of forty or fifty yards. At half past eleven came a second wave; and this was followed by four others of equal magnitude. Others, but smaller, and gradually lessening, continued at uncertain intervals until the evening. A considerable part of the rampart was thrown down, and carried by the torrent above fifty paces. Several persons perished on the causeway leading to the isle of Lesu. The accounts brought to Cadiz reported that Seville had been much damaged, and that a similar fate had attended St. Lucar and Cheres. Conel was said to have been destroyed; and, indeed, with the exception of the provinces of Catalonia, Aragon and Valencia, the effects of this earthquake were felt throughout Spain.

At Madrid the shock was very sensibly felt soon after ten in the morning, and lasted five or six minutes. At first the inhabitants fancied they were seized with a swimming in the head; and, afterward, that the houses were falling. In the churches the sensations were the same, and the terror so great, that the people trod each other under foot in getting out. Those who were within the towers were still more affrighted, fancying every instant while the shock lasted, that they were falling to the ground. It was not sensible to those who were in carriages, and very little so to foot-passengers.

At Gibraltar it was felt about the same time as at Madrid, and began with a tremulous motion of the earth, which lasted about half a minute. A violent shock succeeded; and this again was followed by a second tremulous motion, of the duration of five or six seconds. Another shock, not so violent as the first, subsided gradually; and the whole lasted about two minutes. Several of the guns on the batteries were seen to rise, and others to sink, while the earth had an undulating motion. The greater part of the garrison and inhabitants were seized with giddiness and sickness: several fell prostrate; others were stupefied; and many who were walking or riding, became sick, without being sensible of any motion of the earth. Every fifteen minutes the sea rose six feet; and then fell so low, that the boats and small vessels near the shore were left aground, as were also numbers of small fish. The flux and reflux lasted till next morning, having decreased gradually from two in the afternoon.

In Africa, this earthquake was felt almost as severely as it had been in Europe. A great part of the city of Algiers was destroyed. At Arzilla, a town belonging to the kingdom of Fez, about ten in the morning, the sea suddenly rose with such impetuosity, that it lifted up a vessel in the bay, and impelled it with such force on the land, that it was shattered in pieces; and a boat was found two musket-shots within land from the sea. At Fez and Mequinez, great numbers of houses fell down, and a multitude of people were buried beneath the ruins. At Morocco, similar accidents occurred; and at Salle also, much damage was done. At Tangier the earthquake began at ten in the morning, and lasted ten or twelve minutes. At Tetuan it commenced at the same time, but was of less duration; three of the shocks were so extremely violent, that it was feared the whole city would be destroyed.

In the city of Funchal, in the island of Madeira, a shock of this earthquake was felt at thirty-eight minutes past nine in the morning. It was preceded by a rumbling noise in the air, like that of empty carriages passing hastily over a stone pavement. The observer felt the floor beneath him immediately to be agitated by a tremulous motion, vibrating very quickly. The shock continued more than a minute; during which space the vibrations, although continual, were twice very sensibly weakened and increased in force. The increase after the first remission of the shock was the most intense. During the whole of its continuance it was accompanied by a noise in the air; and this lasted some seconds after the motion of the earth had ceased, dying away like a peal of distant thunder rolling through the air. At three-quarters past eleven, the sea, which was quite calm, suddenly retired several paces; when rising with a great swell, and without any noise, it as suddenly advanced, overflowed the shore, and entered the city. It rose fifteen feet perpendicularly above high-water mark, although the tide, which there flows seven feet, was at half-ebb. The water immediately receded; and after having fluctuated four or five times between high and low water mark, it subsided, and the sea remained calm as before. In the northern part of the island the inundation was more violent, the sea there retiring above a hundred paces at first, and suddenly returning, overflowed the shore, forcing open doors, breaking down the walls of several magazines and storehouses, and leaving great quantities of fish ashore and in the streets of the village of Machico. All this was the effect of one rising of the sea, for it never afterward flowed high enough to reach the high-water mark. It continued, however, to fluctuate here much longer before it subsided than at Funchal; and in some places further to the westward, it was hardly, if at all, perceptible.

These were the phenomena with which this remarkable earthquake was attended, in those places where it was most violent. The effects of it, however, reached to an immense distance; and were perceived chiefly by the agitations of the waters, or some slight motion of the earth. Its utmost boundaries to the south are unknown; the barbarousness of the African nations rendering it impossible to procure any intelligence from them, except where the effects were dreadful. On the north, however, we are assured, that it reached as far as Norway and Sweden. In the former kingdom, the waters of several rivers and lakes were violently agitated. In the latter, shocks were felt in several provinces, and all the rivers and lakes were strongly agitated, especially in Dalecarlia. The river Dala suddenly overflowed its banks, and as suddenly retired. At the same time, a lake at the distance of a league from it, and with which it had no manner of communication, bubbled up with great violence. At Fahlun, a town in Dalecarlia, several strong shocks were felt.

In many places of Germany the effects of this earthquake were very perceptible; but in Holland, the agitations were still more remarkable. At Alphen on the Rhine, between Leyden and Woerden, in the afternoon of the first of November, the waters were agitated to such a violent degree, that buoys were broken from their chains, large vessels snapped their cables, small ones were thrown out of the water upon the land, and others lying on land were set afloat. At Amsterdam, about eleven in the forenoon, the air being perfectly calm, the waters were suddenly agitated in the canals, so that several boats broke loose; chandeliers were observed to vibrate in the churches; but no motion of the earth, or concussion of any building was observed. At Haerlem, in the forenoon, for nearly four minutes, not only the waters in the rivers, canals, &c., but also all kinds of fluids in smaller quantities, as in coolers, tubs, &c., were surprisingly agitated, and dashed over the sides, though no motion was perceptible in the vessels themselves. In these small quantities also the fluid apparently ascended prior to its turbulent motion; and in many places, even the rivers and canals rose one foot perpendicularly.

The agitation of the waters was also perceived in various parts of Great Britain and Ireland. At Barlborough, in Derbyshire, between eleven and twelve in the forenoon, in a boat-house on the west side of a large body of water, called Pibley Dam, supposed to cover at least thirty acres of land, was heard a surprising and terrible noise; a large swell of water came in a current from the south, and rose two feet on the sloped dam-head at the north end of the water. It then subsided, but returned again immediately, though with less violence. The water was thus agitated for three-quarters of an hour; but the current grew every time weaker and weaker, till at last it entirely ceased.

At Busbridge, in Surrey, at half an hour after ten in the morning, the weather being remarkably still, without the least wind, in a canal nearly seven hundred feet long, and fifty-eight in breadth, with a small spring constantly running through it, a very unusual noise was heard at the east end, and the water there observed to be in great agitation. It raised itself in a heap or ridge in the middle; and this heap extended lengthwise about thirty yards, rising between two and three feet above the usual level. After this, the ridge heeled or vibrated toward the north side of the canal, with great force, and flowed above eight feet over the grass walk on that side. On its return back into the canal, it again ridged in the middle, and then heeled with yet greater force to the south side, and flowed over its grass walk. During this latter motion, the bottom on the north side was left dry for several feet. This appearance lasted for about a quarter of an hour, after which the water became smooth and quiet as before. During the whole time, the sand at the bottom was thrown up and mixed with the water; and there was a continual noise like that of water turning a mill. At Cobham, in Surrey, Dunstall, in Suffolk, Earsy Court, in Berkshire, Eatonbridge, Kent, and many other places, the waters were variously agitated.