Ash from the volcano eruption in Tonga on the weekend has created hazy skies and vivid sunsets in the Pilbara, 7,000 kilometres to the west.
The Hunga Tonga Hunga Ha'apai volcano eruption in the South Pacific has been described as one of the most powerful in modern history.
It propelled ash 30km into the sky and triggered a deadly tsunami.
Bureau of Meteorology duty forecaster Jessica Lingard said the volcanic ash was moving west and was now sitting over the Pilbara region in Western Australia.
"Over the last few days there would have been some spectacular sunrises and sunsets as the sun moves and glints through that ash," Ms Lingard said.
Is the ash a risk?
The ash is sitting about 13km above the surface of the earth and Ms Lingard said it posed no risk to people with respiratory problems in the Pilbara.
But she said it could create a hazard for planes at that altitude and that aircraft would have to be diverted.
"It is not likely to fall, but until it dissipates and disperses, we will track this ash cloud as it moves around the world," Ms Lingard said.
Ms Lingard said the ash would likely clear within the next 48 hours or so.
"There should be another beautiful sunset tonight as the sun sets through it," she said.
"We may get a nice sunset tomorrow but that would be the last.
"It is slowly moving westwards.
