Saba is the northernmost potentially active volcano in the Lesser Antilles Volcanic Arc chain of islands. At , Mount Scenery is also the highest point within the Kingdom of the Netherlands. The island is composed of a single rhombus-shaped volcano measuring east to west and north to south The oldest dated rocks on Saba are around 400,000 years old, and the most recent eruption was shortly before the 1630s European settlement (280 years B.P.). Between 1995 and 1997, an increase in local seismic activity was associated with a 7–12 °C (13–22 °F) rise in the temperature of the hot springs on the island's northwest and southeast coasts.