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The Lanzarote 1730 eruption covered an estimated area of 200 square kilometers with lava flows.
The most recent recorded eruption of Mount Banahaw occurred in 1730. This volcanic event was documented in historical records and is considered as part of the volcano's eruptive history.
The hardness of 1730 steel can vary depending on the heat treatment process it has undergone. However, it typically has a hardness in the range of 58-63 HRC (Rockwell Hardness).
Timanfaya last erupted in the 18th century, between 1730 and 1736.
René-Antoine Ferchault de Réaumur invented the Réaumur scale in 1730, with the boiling point of water set at 80 degrees. This scale is rarely used today, with the Celsius and Fahrenheit scales being more common.
The tallest building in North America is the Willis Tower (formerly the Sears Tower) in Chicago. The tower is 1730 feet when measured by pinnacle height and it is 1450 feet when measured to the roof.