But, she says, those microearthquakes extended farther east and north than they would expect just based on the volcanoes seen at the surface.

但是， 她说， 这些微地震向东和向北的延伸范围比他们仅根据地表火山所预期的要远。

Gravity data from satellites echo the look of other calderas. And analysis of such volcanic gases such as sulfur dioxide, as well as patterns of microearthquakes also suggest the presence of a caldera.

来自卫星的重力数据与其他火山口的外观相呼应。对二氧化硫等火山气体的分析以及微震模式也表明存在火山口。