1 Katla produces basaltic magmas that typically do not cause explosive eruptions. 2  Many scientists attribute a layer of ash deposited in the North Atlantic and across Europe some 12,000 years ago to a massive eruption of Katla.
The annual average precipitation at Lacey is 50.79 Inches. Winter months tend to be wetter than summer months. The wettest month of the year is November with an average rainfall of 8.13 Inches. (OLYMPIA AP Weather station, 5.78 miles from Lacey)
Compared to other cities, the likelihood of it raining is greater but the rain in other cities is usually heavier, causing them to have larger averages. The annual precipitation recorded in Seattle ranges from 942 mm (37.07 inches) to 990 mm (39 inches). In order to get the volume of Seattle's annual precipitation, m3, we have to multiply the area of the city in square meters by the average amount of rainfall in meters. According to The New Book of Knowledge, the area covered by the city of Seattle is 238 square kilometers, or 238,000,000 square meters.