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|
It often looks like wind noise on our drums ->