The dynamics of the standoff between the US and North Korea have shifted dramatically in the past week.
First, the North started with an unexpectedly sharp provocation – launching a missile over the Japanese island of Hokkaido – before following that up with its sixth nuclear test. Also, judging by the size the earthquake detected in the country’s mountainous North on Sunday morning, North Korea may have been telling the truth when it said it conducted what it described as its first hydrogen bomb test.
And while the North bragged about the weapon’s “great destructive power” in a TV broadcast, what caught analysts’ attention was a mention of a different tactic: detonating an H-bomb at high altitude to create an electromagnetic pulse that could knock out parts of the US electrical grid.
Unlike a conventional nuke, an EMP blast – think Oceans’ 11 – is not directly lethal, and serves mostly to knock out key infrastructure (useful when robbing a casino).
However, it would probably lead to an unknown number of indirect deaths as hospitals and essential infrastructure lose power.“The idea of an EMP attack is to detonate a nuclear weapon tens or hundreds of miles above the earth with the aim of knocking out power in much of the U.S. Unlike the U.S. atomic bombs dropped over Hiroshima and Nagasaki in 1945, such a weapon wouldn’t directly destroy buildings or kill people. Instead, electromagnetic waves from the nuclear explosion would generate pulses to overwhelm the electric grid and electronic devices in the same way a lightning surge can destroy equipment.”
In the worst possible scenario, regional power grids could be offline for months, potentially costing many deaths as people would eventually start running out of necessities like food and medicine. Lawmakers and the US military have been aware of the EMP threat for many years, according to WSJ. IN a 2008 report commissioned by Congress, the authors warned that an EMP attack would lead to “widespread and long-lasting disruption and damage to the critical infrastructures that underpin the fabric of US society.”
In a report published last month, the Hill noted that the North could choose to carry out an EMP attack on Japan or South Korea as a more politically acceptable act of aggression. Such an attack could help the North accomplish its three most-important political goals, the Hill said.“North Korea has nuclear-armed missiles and satellites potentially capable of electromagnetic pulse (EMP) attack. EMP is considered by many the most politically acceptable use of a nuclear weapon, because the high-altitude detonation (above 30 kilometers) produces no blast, thermal, or radioactive fallout effects harmful to people.
EMP itself is harmless to people, destroying only electronics. But by destroying electric grids and other life-sustaining critical infrastructures, the indirect effects of EMP can kill far more people in the long-run than nuclear blasting a city. In this scenario, North Korea makes an EMP attack on Japan and South Korea to achieve its three most important foreign policy goals: reunification with South Korea, revenge upon Japan for World War II, and recognition of North Korea as a world power.”
Scientists first discovered a hydrogen bomb’s ancillary EMP capabilities after testing one in the Pacific in the early 1960s.“When the U.S. tested a hydrogen bomb in the Pacific in 1962, it resulted in lights burning out in Honolulu, nearly 1,000 miles from the test site. Naturally occurring electromagnetic events on the sun can also disrupt power systems.
A 1989 blackout in Quebec that came days after powerful explosions on the sun expelled a cloud of charged particles that struck earth’s magnetic field.”
Finally, here is a repost from July 2014, in which hedge fund legend Paul Singer, head of Elliott Management, said that “there is one risk that stands way above the rest in terms of the scope of potential damage adjusted for the likelihood of occurrence” – an electromagnetic pulse (EMP). Three years he may be proven correct.EMP: THE MOST SIGNIFICANT DANGER
While these pages are typically overflowing with scary or depressing scenarios, there is one risk that stands way above the rest in terms of the scope of potential damage adjusted for the likelihood of occurrence. Even nuclear war is a relatively localized issue, except in its most extreme form. And the threat from asteroids can (possibly) be mitigated.
The risks associated with electromagnetic pulse, or EMP, represent another story entirely. It can occur naturally, from solar storms that send “coronal mass ejections,” which are massive energetic bursts of solar wind, tens of millions of miles in a mere few hours. Or it can be artificial, produced by a high-altitude (at least 15 miles) explosion of relatively low-yield (even Hiroshima-strength) nuclear weapons.
Different initiators of EMP have different pulses and different effects. But the bottom line is that EMP fries electronic devices, including parts of electric grids. In 1859, a particularly strong solar disturbance (the “Carrington Event”) caused disruption to the nascent telegraph network. It happened again with similar disruptions in 1921, before our modern power grid came into existence. A NASA study concluded these events have typically occurred around once per century. A repeat of the Carrington Event today would cause a massive disruption to the electric grid, possibly shutting it down entirely for months or longer, with unimaginable consequences.
Only two years ago, the sun let loose with a Carrington-magnitude burst, but the position of the earth at the time prevented the burst from hitting it. The chances of additional events of such magnitude may be far greater than most people think.
The artificial version of EMP, a kind of nuclear attack, would require between one and three high-altitude nuclear explosions to create its effect across all of North America. It would not cause any blast or radiation damage, but such an attack would have consequences even more catastrophic than a severe solar storm. It could not only bring down the grid, but also lay down a very intense, very fast pulse across the continent, damaging or destroying electronic switches, devices, computers and transformers across America.
There is no way to stop a naturally occurring EMP, and nuclear proliferation, combined with advances in weapons delivery systems, make the artificial version a distinct possibility, so the dangers are very real.
What can be done about this risk? Critical elements of the power grid and essential electronic devices can be hardened. Spare parts can be stockpiled for other, less critical hardware. Procedures can be developed as part of emergency preparedness so that the relevant government agencies and emergency response NGOs are ready to respond quickly and effectively to an episode large or small.
Why are we writing about EMP? Because in any analysis of societal risk, EMP stands all by itself. Congressional committees are studying this problem, and federal legislation is laboriously working its way through the process. We think that raising people’s consciousness about what should be an effort by both parties to make the country (and the world) safer from this kind of event is a good thing to do.
Full article: A “Super-Powerful” EMP Attack: North Korea’s Newest Weapon Against The U.S. (ZeroHedge)