Is it a volcano in this image ?
The magnified version.
I was browsing through earth images here when I spotted this orange thing. Is it some oceanic volcano?
It may be an absurd question but is it a discovery?
From a list & map of known seamounts and submarine volcanoes it is unlikely the orange region in your picture is a submarine volcano.
The average depth of the Pacific Ocean is 4280 m. At such a depth, a submarine volcanic eruption would not produce such a large area of illumination.
It is more likely that the orange region in your picture is sunglint, which is,
a phenomenon that occurs when sunlight reflects off the surface of the ocean at the same angle that a satellite or other sensor is viewing the surface. In the affected area of the image, smooth ocean water becomes a silvery mirror, while rougher surface waters appear dark.