In 2010, about this time of year, Eyjafjallajökull erupted in Iceland. The ash, supposedly, spread enough throughout the upper atmosphere that even here on the east coast of the U.S. the early part of the summer was significantly cooler than normal.
Is this eruption anywhere near that magnitude?
Iceland was much bigger.
Also they were worried it could have tripped off one of the dormant volcanoes there in Iceland considered the most dangerous.
I was wondering if this was going to be like Mt. Pinatubo as well.
No.
It’s apples and oranges, because the Icelandic eruption took place under a glacier, sending steam (which reverted to ice crystals at altitude) along with ash etc. Also, Hawaii is geographically isolated.
Should point out though, this one is just getting started.
Hawaiian volcanoes are considered low in explosivity. “Effusive rather than explosive.”
This article from geology dot com shows some relative sizes and Eyjafjallajökull was about the same size as Mt. St. Helens. There are far, far bigger eruptions than Vesuvius.
https://geology.com/stories/13/volcanic-explosivity-index/