Magnitude 6.1 earthquake strikes in northern Japan

Lead

A preliminary magnitude-6.1 earthquake struck northern Japan early on Monday local time, according to the US Geological Survey. The quake hit at 5:24am, 18 kilometres west of the small town of Sarabetsu in Hokkaido, at a depth of 81 kilometres, as reported by ABC Australia and The Hindu. The Japan Meteorological Agency (JMA) revised the magnitude to 6.2 and said no tsunami alert was issued, according to the South China Morning Post.

Coverage Comparison

Reports on the earthquake differ slightly in magnitude and emphasis. ABC Australia, citing the US Geological Survey, reported a preliminary magnitude of 6.1, while the South China Morning Post, citing the Japan Meteorological Agency, reported a revised magnitude of 6.2. Both accounts place the epicentre near Sarabetsu in Hokkaido, with ABC Australia noting the quake struck at 5:24am and the South China Morning Post reporting the time as 5:23am. The Hindu also described the event as a preliminary magnitude 6.1 earthquake striking northern Japan, without specifying a time.

The South China Morning Post reported that the JMA predicted minimal damage and threat to life given the sparse population in the region about 200 kilometres east of Sapporo. The agency warned, however, that areas experiencing strong shaking faced increased danger of rockslides and falling rocks, and that further quakes of similar strength could occur in the coming week. The report also noted a separate magnitude 5.0 earthquake occurred in the sea a few hundred kilometres south of Hokkaido.

ABC Australia framed the earthquake within broader regional concerns, noting that last Monday a 7.7-magnitude earthquake off northern Japan triggered a short-lived tsunami alert and widespread evacuation orders affecting about 170,000 people. The outlet also reported that the region continues to battle wildfires, with Japan deploying 1,400 firefighters and Self-Defense Force personnel to fight mountain blazes for a fifth day. The fires, fanned by dry and windy conditions, threatened the coastal town of Otsuchi and expanded to 1,373 hectares as of Sunday morning, prompting evacuation orders for roughly one-third of the town's population. Two additional fires broke out in the north on Sunday.

ABC Australia attributed the increasing frequency of Japan's wildfires to climate change.

Key Claims

• A preliminary magnitude 6.1 earthquake struck northern Japan early Monday, according to the US Geological Survey, as reported by ABC Australia and The Hindu; the Japan Meteorological Agency revised the magnitude to 6.2, as reported by the South China Morning Post.
• The quake's epicentre was 18 kilometres west of Sarabetsu in Hokkaido, at a depth of 81 kilometres, as reported by ABC Australia and The Hindu.
• No tsunami alert was issued for Monday's earthquake, according to the Japan Meteorological Agency, as reported by the South China Morning Post.
• Last Monday, a 7.7-magnitude earthquake off northern Japan sparked a short-lived tsunami alert, according to ABC Australia.
• ABC Australia reported that fires in northern Japan continued to burn, threatening residential areas and prompting evacuations in the coastal town of Otsuchi.
• ABC Australia reported that climate change has increased the frequency of Japan's wildfires.
• A magnitude 5.0 earthquake occurred in the sea a few hundred kilometres south of Hokkaido hours before the main quake, as reported by the South China Morning Post.

Key Claims

• Magnitude: The US Geological Survey reported a preliminary magnitude of 6.1, while the Japan Meteorological Agency revised the quake to magnitude 6.2, according to ABC Australia and the South China Morning Post respectively.
• Epicentre and depth: The quake struck 18 kilometres west of Sarabetsu in Hokkaido at a depth of 81 kilometres, as reported by ABC Australia and The Hindu; the South China Morning Post described the location as Hokkaido's southern region at a depth of 83 kilometres.
• Tsunami alert: The South China Morning Post reported that no tsunami alert was issued.
• Regional context: ABC Australia reported that a 7.7-magnitude earthquake off northern Japan the previous week prompted a brief tsunami alert and widespread evacuations.
• Wildfires: ABC Australia reported that wildfires in northern Japan continued, with fires threatening Otsuchi and additional blazes breaking out on Sunday. The outlet also reported that climate change has increased the frequency of Japan's wildfires.
• Evacuations: ABC Australia stated that evacuation orders related to the fires had been expanded to cover about 170,000 people in the region, and that the Otsuchi fire had grown by 7 per cent since the previous day, reaching 1,373 hectares.