After a dreadful start to the season, Mikel Arteta’s side are now up to 10th place in the league and they never looked in danger against a Newcastle side that looks demoralised.
Aubameyang struck the post in the first half and Alexandre Lacazette forced a good save out of the Newcastle keeper just after the interval.
But Aubameyang finally fired the Gunners ahead in the 50th minute, finishing off a counter-attack, running at the Newcastle defence and then blasting home a powerful left-foot drive at the near post.
Ten minutes later Bukayo Saka made it 2-0 with a confident slot home after good work down the left flank from impressive youngster Emile Smith Rowe, who jinked his way around the back of the Newcastle defence before delivering a pinpoint pass.
Aubameyang completed the comfortable victory after Cedric Soares got to the byline and pulled the ball back into his path.
VAR examined whether the ball had crossed the line before Cedric’s pass but allowed the goal to stand.
Arsenal have now kept a clean sheet in five straight games in all competitions.
“I’m really happy overall. Really positive performance, collective and individually we looked really solid and convincing from the first whistle,” said Arteta.
“It took us a little bit longer than I expected to score the first goal but I really like the chemistry, cohesion and rhythm the team played with.”
Aubameyang had only netted three goals prior to Monday’s game and his manager was delighted to see him score his first double since last season’s FA Cup final.
“He needed that for his confidence and the team needs that to be successful. We need him at his best. We were missing his goals, we all know that so to have them back is great for the team,” he said.
Leicester City moved to the top of the Premier League table and increased the pressure on struggling Chelsea manager Frank Lampard with an impressive victory at The King Power Stadium.
The Foxes knew a win would see them overhaul Manchester United and they were on their way after only six minutes when Wilfred Ndidi fired in off the inside of the post from 20 yards.
Chelsea rarely threatened, although they were denied a first-half penalty by VAR when Christian Pulisic went down under a challenge from Jonny Evans, only for the technology to confirm the offence took place just outside the area.
Lampard’s misery was swiftly reinforced as Leicester City broke clear to add a second four minutes before the break, James Maddison sweeping a cool finish past Chelsea keeper Edouard Mendy on the half-volley from Marc Albrighton’s pass.
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Chelsea barely raised a gallop after the break and it was Leicester who created the better openings as James Justin headed wide when unmarked and Mendy saved from Youri Tielemans.
Leicester are now a point ahead of Manchester United having played a game more while Chelsea are in eighth, five points off the Champions League places.
David Moyes said he wants to take West Ham to the next level after they beat West Brom to move within two points of a Champions League place.
Goals from Jarrod Bowen and Michail Antonio secured a 2-1 win on Tuesday.
The victory moved West Ham on to 32 points after 19 games – their highest points tally at the halfway stage of a Premier League season.
“We’re showing some growth in how we play and what we do,” said Moyes.
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“I’d like to dream a lot but we’re very humble and understand we’re West Ham, we’re not going to start shouting things too soon because history has shown we haven’t always backed it up and I want to be the one to back it up.
“We’re going step by step and making good progress picking up points. I want us to be competing at the top end and to do that we have to keep winning.”
West Ham took the lead on the stroke of half-time when Bowen chested in Vladimir Coufal’s cross.
The visitors levelled soon after the restart through Matheus Pereira’s thunderous drive from distance.
Dara O’Shea then blocked Manuel Lanzini’s goalbound shot but Antonio gave West Ham the win with a hooked finish.
From then on, West Ham looked comfortable without threatening to add to their lead as they claimed a third Premier League win in a row.
Defeat for West Brom, meanwhile, leaves them 19th, five points from safety.