【週刊地震 2024.1.28】 日曜朝に関東広域の地震　東京湾震源で最大震度4

Summary

Over the past week, seismic activity remained high around the Noto Peninsula, with 6 earthquakes of magnitude 3 or greater. A magnitude 4.8 earthquake struck north of Tokyo Bay this morning, the strongest shaking in Tokyo in nearly a year. Activity around the Noto Peninsula has calmed compared to early January, but strong aftershocks are still possible. The area off the southeastern coast of the Nemuro Peninsula saw a magnitude 4.8 quake this week, the strongest there in 3 years. This region has an elevated risk of a massive quake in the next 30 years. Meanwhile, a magnitude 7.0 quake struck western China this week, causing substantial damage.

Takeaways

• 😮 This week there was high seismic activity around the Izu Peninsula
• 😲 6 earthquakes of seismic intensity 3 or higher occurred around the Izu Peninsula
• 😳 A magnitude 4.8 earthquake occurred today off the coast of Tokyo
• 😨 The Tokyo earthquake was the strongest shaking in the area since May 2021
• 🤔 The Tokyo quake appears to be a single event, not leading to many aftershocks
• 😧 A magnitude 4.8 quake occurred off the coast of Nemuro Peninsula in Hokkaido
• 😀 Seismic activity around the Izu Peninsula is calming compared to early January
• 😯 Last major quake off Nemuro Peninsula was in February 2021
• 😱 A magnitude 7.0 earthquake struck Xinjiang, China this week
• 😥 The Xinjiang quake was shallow and likely caused damage

Q & A

What was the magnitude and depth of the earthquake that occurred near the east coast of Honshu on January 29?

The earthquake had a magnitude of 4.8 and occurred at a depth related to the subducting Pacific plate beneath the Kanto region.

What was the maximum seismic intensity observed in Tokyo from the January 29 earthquake?

A seismic intensity of 4 on the Japanese scale was observed in Tokyo and Yokohama city in Kanagawa prefecture.

When was the last time an intensity of 4 or greater was observed in Tokyo prior to the January 29 earthquake?

The last time an intensity of 4 or greater was observed in Tokyo was in May 2022 from an earthquake off the coast of Chiba prefecture.

What is the expected probability of a massive M7.8-8.5 earthquake occurring in the Nemuro peninsula region within 30 years?

The Nemuro peninsula region has an 80% probability of experiencing a massive M7.8-8.5 earthquake within 30 years.

How many seismic events of intensity 3 or greater occurred near the Nojima peninsula over the past week?

Six seismic events of intensity 3 or greater were recorded near the Nojima peninsula over the past week.

How has the aftershock activity near Nojima peninsula changed compared to early January?

The number of aftershocks near Nojima peninsula has reduced considerably compared to early January, indicating more stabilized conditions.

What was the magnitude and location of the largest overseas earthquake over the past week?

A M7.0 earthquake occurred on January 23 in the Xinjiang Uygur region of China.

What potential seismic intensity was estimated near the epicenter of the M7.0 China earthquake?

The estimated seismic intensity near the M7.0 China earthquake epicenter was around lower 6 on the Japanese scale.

What notable historical earthquakes have occurred in the broader region of the recent M7.0 China earthquake?

A M8.0 earthquake occurred in Kyrgyzstan in the broader region in 1911, indicating the area's susceptibility to large seismic events.

Where can I find the latest domestic and overseas earthquake information and news?

The latest domestic and overseas earthquake information and news is available on the Weather News earthquake application.