No Tsunami Threat To Hawaii From Alaska Earthquake

The Pacific Tsunami Warning Center said a magnitude 6.1 earthquake that struck Alaska today poses no local threat of a tsunami.

 

A earthquake magnitude 6.1 (ml/mb) has struck on Sunday, 116 km SE of Cold Bay, Alaska (72 miles). Exact location, longitude -161.4719° West, latitude 54.4279° North, depth = 26.92 km.

The 6.1-magnitude earthquake has occurred at 15:35:37 / 3:35 pm (local time epicenter). A tsunami warning has been issued near Cold Bay in Alaska (Does not indicate if a tsunami actually did or will exist).

Bali Volcano Shoots New Burst Of Ash; Flights Unaffected

A volcano on Indonesia’s tourist island of Bali shot a new burst of hot ash into the air early Sunday in the latest of the country’s several eruptions within a week.

Mount Agung erupted for about three minutes, spewing white clouds of smoke and ash more than 700 meters (2,300 feet) into the air, the Volcanology and Geological Mitigation Agency said in a statement.

The eruption of the 3,031-meter (9,940-foot) volcano didn’t prompt evacuations, and its alert status remains at the second-highest level. The agency warned tourists to stay away from the danger zone in a 4-kilometer (2.5-mile) radius around the crater.

Agency spokesman Sutopo Purwo Nugroho said that white dust from the eruption blanketed several villages close to the mountain slope in Karangasem district.

Ngurah Rai International Airport spokesman Arie Ahsanurrohim said that flights were operating normally. Authorities said the air around Denpasar, the Bali provincial capital, is clear from ash.

More than 140,000 people had fled the area around the mountain in late September after its alert status was raised to the highest level, indicating an eruption may be imminent. The alert status was lowered two weeks later, allowing for the return of those displaced from government shelters.

An eruption in 1963 killed about 1,100 people. Agung lies about 70 kilometers (45 miles) northeast of Bali’s tourist hotspot of Kuta.

It is among more than 120 active volcanoes in Indonesia, which is prone to volcanic eruptions and earthquakes because of its location on the so-called “Ring of Fire” — a series of fault lines stretching from the Western Hemisphere through Japan and Southeast Asia.

Last week, Anak Krakatau in Indonesia’s Sunda Straits erupted and collapsed into the sea, causing a tsunami that killed 431 people on Java and Sumatra. More than 46,600 were displaced.

Indonesian Volcano That Triggered Tsunami Loses Two-Thirds Of Its Height

Anak Krakatoa, the Indonesia volcano that triggered a deadly tsunami a week ago, has lost two-thirds of its height, a government agency said.

The volcano’s height went from 338 meters (1,108 feet) above sea level to 110 meters (360 feet), Indonesia’s Center of Volcanology and Geological Hazard Mitigation said in a report.

Additional eruptions from Monday to Thursday also caused the volcano to lose volume of 150 million to 180 million cubic meters (5.3 billion to 6.4 billion cubic feet), the report said. Its volume is now 40 million to 70 million cubic meters (1.4 billion to 2.5 billion cubic feet).

The December 22 tsunami was triggered by a volcanic eruption that caused a 64-hectare (158-acre) chunk of Anak Krakatau to slide into the ocean.

Government and rescue agencies cited multiple factors in the wave that struck coasts on the islands of Java and Sumatra. The eruption came at high tide during a full moon, and the Sunda Strait, which runs between Java and Sumatra, also had been experiencing high rainfall.

On Saturday, Indonesia revised the number of people killed in last week’s tsunami to 426 people from an earlier toll of 430, citing duplications in government recording.

At a press briefing Friday, Sutopo Purwo Nugroho, a spokesman at Indonesia’s disaster management agency, said 7,202 people had been injured, 29 people remained missing and 43,386 had been displaced.

Officials said this week that sensors had been placed near Anak Krakatau for better detection of activity within the volcano in hopes of providing a warning about eruptions.

Indonesian authorities have been roundly criticized for the state of the country’s tsunami detection and warning system, which has been largely out of action since at least 2012.

The alert level for the volcano remains at its second-highest — Level 3. Tremors continue and a pyroclastic flow, a mix of ash, rock and volcanic gases, runs 2 kilometers (1.2 miles) from the crater. Pyroclastic flow can be much more dangerous than lava.

More than half the population have been evacuated on Sebesi and Sebuku islands near Anak Krakatau in the Sunda Strait.

Earthquake Off Philippine Coast Hits A Region Already On High Alert

An undersea earthquake occurred Saturday off the coast of the southern Philippines. The U.S. Geological Survey says it struck at a depth of about 38 miles and had a magnitude of 7.0. According to The Associated Press, no casualties or damage had been reported as of a few hours after the quake.

It was felt in several cities in the southern Philippines and led the Pacific Tsunami Warning Center to issue a tsunami threat – which has since been lifted — for areas along the coasts of Indonesia and the Philippines.

This most recent scare, which seemed to cause little damage, is the latest seismic activity in a region reeling from disaster. On Dec. 22, a tsunami hit Indonesia and killed at least 430 people. NPR’s Anthony Kuhn reported that Indonesia’s seismic activity directors were faulty, which meant that residents were not properly warned. Kuhn also noted that Indonesians did not feel an earthquake, a common warning sign, before the tsunami struck.

A widely shared video of a concert is one of the more unsettling illustrations of how unexpected the disaster was: The local pop-rock band Seventeen was performing at a party in Java one moment and taken by a massive wave the next.

Now scientists might know why last Saturday’s disaster happened. According to a statement from the European Geosciences Union, the partial collapse of Anak Krakatau, a volcano in Indonesia’s Sunda Strait, may have caused the tsunami. Researcher Raphaël Paris says Anak Krakatau’s instability will continue to pose a risk. In the EGU statement, Paris says, “There is a big uncertainty on the stability of the volcanic cone now and the probability for future collapses and tsunamis is perhaps non-negligible.”

When Anak Krakatau lost a 64-hectare portion of its west-southwest flank, tons of rocky debris fell into the sea and brought forth powerful waves. This, according to the BBC’s Jonathan Amos, could have been the source. NPR’s Julie McCarthy reports that researchers say the volcanic cone has decreased in height from 1,108 feet to just 336 feet. Satellite images also show a significant decrease in Anak Krakatau’s size.

Paris was part of a team that modeled a very similar Anak Krakatau-induced tsunami back in 2012. Mike Burton, president of the EGU Division on Geochemistry, Mineralogy, Petrology and Volcanology, said in the EGU’s statement: “The hazard scenario were therefore understood, but the management of such a hazard obviously remains a major challenge.”

The exact details of the tsunami’s cause — the nature of the eruption that triggered the loss of the flank, for example — will not be determined until researchers can access the area of the volcano, according to the BBC’s Amos.

Anak Krakatau translates to “child of Krakatau.” Anak’s parent, Krakatau (or Krakatoa), is perhaps best known for exploding in 1883. According to Hawaii Public Radio’s Neal Conan, about 100,000 people died from that eruption’s direct effects and more than 35,000 others died from resulting tsunami waves. Anak Krakatau was formed from what remained of Krakatau.

Less than three months ago, another tsunami in Indonesia killed at least 1,400 others. And in August, a 6.9 magnitude earthquake killed at least 460. A statement issued in October by Indonesia’s National Agency for Disaster Management said 1,999 natural disasters occurred in Indonesia in 2018, leaving 3,548 dead or missing.

Our Universe: An Expanding Bubble In An Extra Dimension

Uppsala University researchers have devised a new model for the Universe — one that may solve the enigma of dark energy. Their new article, published in Physical Review Letters, proposes a new structural concept, including dark energy, for a universe that rides on an expanding bubble in an additional dimension.

We have known for the past 20 years that the Universe is expanding at an ever accelerating rate. The explanation is the “dark energy” that permeates it throughout, pushing it to expand. Understanding the nature of this dark energy is one of the paramount enigmas of fundamental physics.

It has long been hoped that string theory will provide the answer. According to string theory, all matter consists of tiny, vibrating “stringlike” entities. The theory also requires there to be more spatial dimensions than the three that are already part of everyday knowledge. For 15 years, there have been models in string theory that have been thought to give rise to dark energy. However, these have come in for increasingly harsh criticism, and several researchers are now asserting that none of the models proposed to date are workable.

In their article, the scientists propose a new model with dark energy and our Universe riding on an expanding bubble in an extra dimension. The whole Universe is accommodated on the edge of this expanding bubble. All existing matter in the Universe corresponds to the ends of strings that extend out into the extra dimension. The researchers also show that expanding bubbles of this kind can come into existence within the framework of string theory. It is conceivable that there are more bubbles than ours, corresponding to other universes.

The Uppsala scientists’ model provides a new, different picture of the creation and future fate of the Universe, while it may also pave the way for methods of testing string theory.

Sicily Is Shaken By Earthquake As Mount Etna Erupts Once Again

First came the eruption. Then, the quake.

An overnight earthquake, triggered by Mount Etna’s eruption two days ago, caused injuries and damage in Eastern Sicily early Wednesday morning. The volcano has been spewing ash and lava has flowed down its slopes since it began erupting on Monday.

The quake registered 4.8 magnitude, according to Italian news agency ANSA, which reported 600 people were displaced by the temblor. Officials said the quake was one of about 1,000 tremors — most of them small — related to Etna’s eruption, The Associated Press reports.

NPR’s Sylvia Poggioli reports that Italy’s Civil Protection Agency set up temporary shelters for those whose homes were damaged or who were too frightened to go home.

At least 10 people were injured, according to the AP, and others sought medical care for panic attacks or shock.

A section of a major roadway was closed, as was the railway along the Ionian coast, ANSA reported.

Images of the area showed churches and buildings strewn with rubble, fallen signs in front of shops, and toppled statues.

On Monday, ANSA reported that a new fracture had opened on Etna’s southeast crater, from which ash was spewing. Authorities closed down airspace over the airport in the nearby city of Catania.

“Etna remains a dangerous volcano, and this country of ours is unfortunately fragile,” government Undersecretary Vito Crimi said Wednesday, according to the AP. Many people reportedly slept in their cars after the quake.

Mount Etna is the most active stratovolcano in the world, according to the United Nations, which has named it a World Heritage Site. Etna has one of the world’s longest documented history of eruptions, stretching back to 1,500 B.C.

One local resident said the earthquake was worrying.

“Tremors during eruptions are pretty normal here,” Gaetano Maenza told The Guardian. “What is unusual is the level of magnitude triggered by Etna. I have no memory of such intensity. It was scary.”

Mount Vesuvius, located near Naples in a heavily populated region of Italy, has also exhibited increased seismic activity recently, according to the newspaper.

UPDATE : Rescue Efforts Underway After Tsunami Hit Indonesia Without Warning

Rescue crews are helping thousands of people who were injured or displaced after a tsunami struck the coasts of Java and Sumatra in Indonesia on Saturday night. Many residents did not receive any warning before the tsunami, which killed hundreds.

Volcanic activity on Indonesia’s famous Anak Krakatau island triggered underwater landslides that caused the tsunami, officials say. Anak Krakatau emerged from the site of an 1883 eruption that killed tens of thousands of people and has drawn tourists from around the world.

At least 373 people have died, with 128 missing and nearly 1,500 wounded, according to Sutopo Purwo Nugroho, a spokesman for Indonesia’s disaster management agency.

Crews continue to search for survivors while retrieving bodies from the wreckage with heavy machinery and their hands, Reuters reports.

The Red Cross has dispatched 22 ambulances and more than 100 volunteers to transport the injured. Blocked streets have hindered access to health centers in Pandeglang, on the island of Java, where Doctors Without Borders volunteers are helping to treat patients injured by the tsunami and falling rubble.

Indonesian President Joko Widodo arrived at the disaster zone on Monday, while members of the military and volunteers continue to search affected areas. Authorities have warned residents to stay away from beaches because of the risk of continued volcanic activity.

The tsunami caught residents by surprise because the country’s seismic activity detectors were not functioning properly, NPR’s Anthony Kuhn reports. Nugroho acknowledged Indonesia’s detection buoys have been dysfunctional since 2012, according to The Associated Press, a result of vandalism and budget issues.

Kathy Mueller, a communications delegate with the Red Cross, was working in Indonesia when the tsunami hit — because of ongoing recovery efforts after a previous tsunami in September, which killed more than 1,700 people.

She says Saturday’s tsunami affected Java’s entire western coastline.

“There are a lot of communities we know … have not yet been accessed,” she told NPR’s David Greene. “It’s going to take some time before we get a fully clear picture of what the full extent of the damage is.”

The Indonesian Red Cross dispatched more than 117 volunteers to the affected area immediately after the disaster, Mueller says. They brought basic supplies, including blankets, clothes, food and water.

The tsunami struck Indonesia’s two most populous islands. Proximity to the nation’s capital, Jakarta, has facilitated the mobilization of volunteers, military and emergency personnel, compared to previous disasters.

Mueller adds that emergency respondents have become proficient at purifying drinking water since the Indian Ocean tsunami in 2004, which killed more than 200,000 people.

But she says three major disasters since the summer — massive earthquakes on the island of Lombok in July and again in August, followed by September’s tsunami and earthquake on the island of Sulawesi — have taxed the country, even before the latest tsunami.

“People are a little bit tired now,” she says.

On Sulawesi, thousands of residents still live in tented camps, according to Mueller.

Now this disaster has displaced 11,000 more people in Java and Sumatra, who are residing in government buildings and camping out in tents beside hospitals.

“A lot of them were holidaymakers,” Kuhn says. “The government has tried to turn the western tip of Java into a new tourist destination to rival the island of Bali. But that effort has been suspended after this disaster.”

Several of the dead were members of the local pop-rock band Seventeen, which was performing at a year-end party in Java when the tsunami struck, sweeping away performers and concertgoers.