According to recent U.S. Geological Survey (USGS) data, the Russian Far East chain, the Kuril Islands, was hit by a massive 6.3 magnitude earthquake, with initial reports stating a 6.5. The epicenter was south of the archipelago, approximately 93 miles from the closest town, Severo-Kurilsk.

The quake occurred beneath the surface of the ocean, on its floor—exactly like the Great Tohoku Earthquake quake that resulted in tsunamis and nuclear reactor meltdowns and destroyed much of the Japanese east coast in March 2011.

In this case, there were no tsunamis. Although there are some discrepancies between the USGS estimates and those of the Geophysical Center of the Russian Academy of Sciences (which has a local branch that recorded the quake), the earthquake occurred at a depth somewhere between 11 and 46 miles beneath the surface of the ocean.

Severo-Kurilsk, and its roughly 2,500 inhabitants, felt the tremor at about 4.0 on the Richter scale. And there are no reports of any injuries or damage by any of the island chain’s 20,000 residents.

The island on which Severo-Kurilsk sits is very close to the Russian peninsula of Kamchatka. The Kuril Island chain was formed volcanically and stretches about 810 miles northeast from the Japanese island of Hokkaido to the aforementioned Russian Kamchatka Peninsula. The archipelago separates the Sea of Okhotsk from the Pacific Ocean.

The chain is comprised of 56 islands and hundreds of minor rocks and islets. The 20,000 residents are broken up into Ainu (indigenous, but not ethnic, Japanese islanders), ethnic Russians, and a variety of other former Soviet ethnicities.

There is a reasonably strong Russian military presence on the archipelago, due to both ethnic as well as political tensions that stretch back decades.  For example, ethnic Ukrainians make up a significant slice of the population.  The political unrest between Russia and Ukraine over the Russian annexation of Ukrainian territory accounts for some of this tension.

Everything you need to be prepared for an earthquake

Read Next: Everything you need to be prepared for an earthquake

Further, there are ongoing territorial disputes between Russia and Japan over these islands, going back to the end of World War II.

In a vacuum, this earthquake is almost meaningless. But add the Japanese political claims on some of these islands, add the ethnic Ukrainians (whose homeland is half a world away), and a localized event becomes a global affair.

On some of the islands closer to Hokkaido, many residents still consider themselves legally Japanese, if not ethnically.  The Ainu people—most of which live on Hokkaido—are still considered Japanese, like the Ryukyu islanders of Okinawa.

And over the decades since the end of WWII and the San Francisco Treaty, Russia has slowly penetrated deeper and deeper into what had been considered sovereign Japanese territory.

As the Russian economy continues to suffer, and Russian military policy shifts away from planting kinetic military units on land it wants—a strategy now taken up by the Chinese in regions like the South China Sea—and focuses more toward influence operations and cyberwarfare, lands like the Kuril Islands seem unappealing for Russian expansionism.

There are no obvious fossil fuels.  No strategic value—given the cost of even being there.  And no real reason to develop or maintain any real military to project Russian force.

So, three countries now have to take a closer look at the small local fishermen who inhabit the 8 out of 56 islands: Russia has to determine how much more money they want to dump into the distant outpost; Japan and Ukraine—who are both more than willing to put any thorn they can in Russia’s side—are now scrambling to form a tighter political argument to protect their own sovereign citizens.

The bottom line here is that the three nations are now calculating just how valuable those islands and those people are to their political ends. And of the three, only Japan has the ability and willingness to even begin to pay whatever the cost might be.