Earth Changes
It said accumulations of up to 20cm (8in) were likely, mainly above 400m but possibly as low as 300m, with drifting caused by strong easterly winds.
Main routes which could be affected include the A9 around the Drumochter pass, the A82 north of Tyndrum and the A87 west of Invergarry.
The agency warned: "The public should be aware of the risk of difficult driving conditions on higher roads.
John Bellini, a geophysist at the U.S. Geological Survey's National Earthquake Information Center in Goldon, Colo., said the earthquake's epicenter was roughly five miles south of Galesburg, or nine miles southeast of Kalamazoo in central Michigan.
He said the earthquake at 12:23 p.m. could be felt widely across lower portions of the state and into northern Indiana, northwestern Ohio, eastern Illinois, southeastern Wisconsin, and western Ontario.
Gov. Rick Snyder's office said there were no immediate reports of damages or injuries.
Bellini said Michigan has had only one other earthquake of this magnitude, a 4.6 earthquake that shook the state in August 1947. Its epicenter was close to Saturday's - about 30 miles to the southeast.
He said earthquakes of this magnitude are capable of causing minor damages, such as knocking items from shelves, cracking plaster or windows, or damaging brickwork or chimneys on older buildings.
He called today's earthquake "quite uncommon. Michigan doesn't get a lot of large earthquakes."
Since 1973, the state has had only two other recorded earthquakes - one in the western reaches of the Upper Peninsula, the other in central Michigan. He said dates for those quakes were not available.
USGS initially placed the magnitude of the quake at 6.1 but later dropped it to 5.7.
Hachijo-jima, a volcanic Japanese island in the Philippine Sea, has a population of about 8,000 people.
The quake occurred 456 km from the country's capital, Tokyo, which is home to some 13 million inhabitants.It also struck 359km from the towns of Shimoda, home to 23,000 residents, and Tateyama, which has 28,000 people.
In April, southwestern Japan's Miyakojima and Yaeyama areas were placed on high alert with tsunami warnings after a 6.8-magnitude underwater earthquake struck off Taiwan's coast. Waves as high as one meter were expected to hit southwestern territories.
The volcanic activity was recorded at 8:09 a.m., although it may not have been observed visually due to thick rain clouds covering the summit.
"At around 10:30 a.m., when the crater became visible, strong to moderate, dirty white steaming was observed, reaching 200 meters high and drifting west-northwest coming from the northwest vent of the volcano," Phivolcs said.
Only five (5) volcanic earthquakes were detected during the past week by the Bulusan seismic network, but after the steam and ash explosion, the network recorded approximately 40 volcanic earthquakes.
Alert Level 0 status currently prevails over Bulusan Volcano, Phivolcs added.
However, local government units and the public are reminded that entry to the 4-kilometer radius Permanent Danger Zone (PDZ) remains strictly prohibited due to the possibility of sudden and hazardous steam-driven or phreatic eruptions.
Civil aviation authorities must also advise pilots to avoid flying close to the volcano's summit as ejecta from any sudden phreatic eruption can be hazardous to aircraft.
These stunning photos show a spectacular sun halo forming in the skies over Wirral.
Haloes - rings that form around the sun or moon - are created by light being reflected by ice crystals formed in high cirrus clouds.
While they can be an indicator of rain, as the ice crystals often indicate an approaching frontal system, it is thought this halo was formed as a result of unusually cold overnight temperatures.
The photos were taken in Bromborough by Kirsty Bakstad outside her home this morning.
She told the ECHO: "It was about 11am, we were just pulling up outside our home in Bromborough when my husband Will, who had his sunglasses on, spotted it.
"He told me to look through the sunglasses, and there was this huge ring around the sun.
"I took a few pictures with my phone through the sunglasses, then a few directly.
"I had to Google it to find out what it was.
"I love taking weather pictures, usually red sunsets or funny-shaped clouds, but I've never seen anything like this before."

Bruce, a 4-year-old pit bull, has a drainage tube running from his forehead to the side of his cheek to help him recover from a cougar attack.
Bruce, who lives with his owner Ron Smid in a secluded area, disappeared into the woods last Thursday, April 23, returning a few minutes later — bleeding.
"He must have caught a scent and he didn't want to be called back," said Smid.
It wasn't until Bruce was examined by the vet and his body shaved, that the full extent of his injuries could be seen.
There were puncture wounds all over the dog's body and lacerations across his head.
"The largest wound that is apparent is a large tooth-like fang that went through the middle of his skull and it actually penetrated right to the bone," said Smid.
Those killed by nature's wrath were identified as Abdul Jalil, 50, Harivokto Das, 45, Razu Miah, 20, Abdul Kader, 18, and Rasheda Begum, 31.
According to police and eyewitnesses, four people were killed as they were harvesting a paddy at the croplands during the morning in Dirai and Dharampasa areas when the thunderbolts killed them.
Another victim of lightning, Rasheda was struck when she ventured outside the safety of her home to save her cattle in Kuna Kucha village, according to Mohammad Shahidullah, officer-in-charge of Tahirpur Police Station.
Those injured in the incident were then taken to Dirai Upazila health complex for treatment.
The group was chased by the elephant.
While the rest managed to flee to safety, Balan went missing. On Friday, Balan's body was found at Nelson estate near Bokkapuram. On behalf of the State Government,
Forest Department officials gave away the first instalment solatium of Rs. 25,000 to his family.
The body was sent to Gudalur Government Hospital for post-mortem examination.
Most of the year, it looks like any other lake; peaceful and still.
But come winter, and a mysterious hole begins draining it of all its water, leaving a barren landscape that has baffled scientists for centuries.
As the eruption cooled, the hardened pipes emptied, leaving behind tubes in the form of vast tunnels.

A farmworker checks the banana plants devastated by a twister in Barangay Manongol, Kidapawan City.
It was the third to occur in the city this month, officials said. On Monday last week, a tornado damaged some P2 million worth of fruiting banana plants in Barangay Paco. Another damaged 27 houses in Barangay Magatos in Kabacan town, according to Mayor Herlo Guzman.












