I don't know the exact reason why ethereum pump but if the reason is definitely that the bitcoin price is also experiencing a pump, maybe another reason is v2.0 which will be released soon
the main reason is indeed on the topic Ethereum 2.0 and the bullish Bitcoin,
we have passed a long bearish season, it's time for the bullish season, so Ethereum is the key
It could be the reason behind the sudden pump in ETH price but maybe blockchain has been approaching it's five year anniversary on 30th July and it could seem possible to be the reason behind all this.