A paper burst is a tear, usually greater than 3 inches, that occurs anywhere other than the edges of a roll or sheet.
These tears are caused by tension during the paper making process. The tear is actually a rupture caused by too much tension between hard and soft sections of the paper reel during winding. The high tension exceeds the strength of the paper as it is winding and tears.
The tears happen at irregular intervals in a sheet pile or paper roll. They are most common on the outer diameter. They form a somewhat curved split in the paper and they almost certainly cause paper jams for offset sheetfed printers and web breaks for web printers.
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