Tremors?

No not those!

One of the fun things you learn in school is that you can have 1 cat or 2 cats,  but sheep is sheep no matter how many there are!

The same goes for a word we use often with our volcanoes - tremor. The media (who probably think we can't spell) often change our information, and publish 'tremors' but it actually doesn't have an s at all!

So what is volcanic tremor??

Volcanic tremor on White Island last year

Its a continuous or semi-continuous ground vibration produced by degassing, underground boiling, magma movement, ash eruptions and a range of other sources.

It often looks like wind noise on our drums ->