它的确频繁喷发，但这些爆发通常都是小规模的。
It does erupt frequently, but those eruptions are usually minor.
这些爆发与我们在地球上火山喷发时看到的相似。
These bursts are similar to what we see when volcanoes erupt on Earth.
卡特拉似乎是半规律地喷发的，典型的周期是每次爆发之间相隔30到80年。
Katla seems to erupt on a semi-regular basis, with typical periods between eruptions of between 30 and 80 years.
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