 Two earthquakes had their epicenter near this lake, the first in 1906 (a magnitude 6.8 on the Richter scale), and the second in 1985 (magnitude 6.2).After the earthquake of 1906 there formed a 25–30 m tall geyser on Edo Laki Island on the northern part of the lake.The geyser disappeared circa 1966 – 1970, leaving a hot spring.