nearly a month. The eruption resulted in the appearance of a small island of "one league in circumference" that shortly disappeared. The eruption caused no damage on land. 1547: An earthquake rocked the northeastern part of Terceira Island. It happened on 17 May and damaged Raminho, (Folhadais), Altares, and Biscoitos. 1562–1564: A volcanic eruption on Prainha do Norte, Pico Island. On 21 September 1562 tremors lasting for a "third of an hour" shook the land, and were followed by a bang. An interesting contemporaneous description of the eruption still exists; people in the town of Velas on São Jorge Island observed it. 1563: Volcanic eruption at Lagoa do Fogo, São Miguel. The eruption began on 29 June, and five violent earthquakes shook the area. There was enormous destruction on the island. The violent eruption ended on 3 July. The activity was a Plinian eruption. 1563: A volcanic eruption on São Miguel, almost simultaneous with the eruption on Lagoa do Fogo, caused a strombolian eruption in Pico do Sapateiro parish of Ribeira Seca. The peak was a dome located near the graben of Ribeira Grande where a lagoon used to exist. The volcano spewed large amounts of very fluid basaltic lava. An historian wrote in full detail about the eruption; it is included in the account called Fénix Angrense ("The Phoenix of Angra"). 1564: Another volcanic eruption on Lagoa do Fogo, São Miguel. The eruption began on 13 February and lasted for a few days, causing no damage. 1571: A "seismic crisis" caused great damage in Angra do Heroísmo during the month of June. The earthquake was centered southeast of Terceira Island, probably at Dom João de Castro Bank. It shook Terceira and was felt in São Miguel too. Someone noted that a ship was sailing in the area at the time of the onset of the earthquakes. 1580: An eruption of the volcano of Queimada, São Jorge. On the night of 28 April, the land trembled thirty times and fifty times more the next day. On 1 May, there were tremors and an explosion on the top of the volcano. Another explosion happened in front of the upper part of Ribeira do Nabo, two kilometres east of the volcano. The lava flows began near Ribeira do Almeida. The eruption lasted four months, with large lava flows and volcanic ashes spread as far as Terceira. 1588: Large floods in São Bento