Volcanic activity has created thermal springs and boiling mud pools.

火山活动产生了温泉和沸腾的泥浆池。

《柯林斯英汉双解大词典》

So this too suggests ongoing volcanic activity.

这也表明了火山活动将会继续。

youdao

How can volcanic activity occur so far from a plate boundary?

火山活动是如何在离板块边界那么远的地方发生的呢？

youdao

Volcanic activity broke the large island into pieces that came to the surface of the sea over time.

VOA: special.2009.12.16

She found out about the volcanic activity that has shaped the surface of Mars.

VOA: special.2010.07.28

Because of volcanic activity, Alaska also has a lot of earthquakes.

VOA: special.2009.03.02

One confounding factor is that the late Cretaceous was also a period of great volcanic activity.

ECONOMIST: Mass extinctions

Paradoxically, its surface appears to be shaped by the deformation of the crust and by volcanic activity.

ECONOMIST: Planetary science

The Philippine archipelago is located in the Pacific "Ring of Fire, " where earthquakes and volcanic activity are common.

WSJ: Quakes Kill 2 in Taiwan, Injure 33 in Philippines