Archive · 7 Aug 2026
Twin earthquakes rattle Arunachal Pradesh; Japan hit by 7.1 quake
Sometimes the ground shakes, and we call that an earthquake.
When two big earthquakes happen close together in the same place and time, scientists call them twin earthquakes.
Twin earthquakes hit Arunachal Pradesh in India one morning, just a couple of hours apart.
In fact, the region felt four earthquakes in less than one day.
Japan also gets many earthquakes because it sits where four giant pieces of Earth's shell meet.
A big 7.1 earthquake recently shook Kumamoto in Japan.
India is also planning something big under the sea: a scheme called Samudra Manthan to drill for oil and gas deep in the ocean.
There is another idea called climate whiplash, which means weather swings quickly from very wet to very dry.
That can dry out plants and make wildfires spread more easily.
Twin (doublet) earthquakes struck Arunachal Pradesh early Thursday, with the first hitting Upper Siang district around 5:45 AM and a minor tremor following around 7:17 AM.
Arunachal Pradesh experienced a total of four earthquakes in less than 24 hours, according to the National Center for Seismology.
A magnitude 7.1 earthquake struck Japan's southern Kumamoto prefecture on July 28, the nation's eighth quake of 7+ magnitude in the last decade.
India's Samudra Manthan (National Offshore Exploration) scheme allocates Rs 43,200 crore for deep-sea exploratory drilling and Rs 28,534 crore for offshore data acquisition.
Climate whiplash - rapid swings between extreme wet and dry conditions - is becoming more common and fueled last year's California wildfires, researchers say.
- Who
- Residents of Upper Siang district in Arunachal Pradesh, India, and Kumamoto prefecture in Japan; the National Center for Seismology monitored the tremors.
- What
- Twin (doublet) earthquakes shook Arunachal Pradesh, while a 7.1-magnitude earthquake struck Japan's Kumamoto prefecture; India's Samudra Manthan scheme will fund deep-sea exploration.
- When
- Early Thursday (first quake at about 5:45 AM, second about 7:17 AM); the Japan quake hit on July 28.
- Where
- Upper Siang district, Arunachal Pradesh, India; Kumamoto prefecture, Japan.
- Why
- Twin earthquakes occur when two large quakes of similar size strike close together in location and time; Japan sits at the collision point of four tectonic plates.
- First quake location
- Upper Siang district, Arunachal Pradesh
- First quake time
- Around 5:45 AM
- Second tremor time
- Around 7:17 AM
- Total quakes in under 24 hours
- Four in Arunachal Pradesh
- Japan earthquake magnitude
- 7.1 (initially recorded)
- Samudra Manthan drilling allocation
- Rs 43,200 crore
- Samudra Manthan data acquisition allocation
- Rs 28,534 crore
- Scheme implementation period
- Till financial year 2030-31