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Volcano Watch: A decade later, remembering the Pahoa lava flow crisis

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Volcano Watch: A decade later, remembering the Pahoa lava flow crisis


Over the past few years, eruptions of Kilauea volcano on the Island of Hawaii have happened in remote regions and lava flows have not directly threatened communities. However, the approaching anniversary of a lava flow crisis a decade ago reminds us that eruptions on Kilauea have the potential to cause damage and island-wide disruption.

The 2018 lower East Rift Zone eruption of Kilauea is still fresh in many of our minds, but even before then, Kilauea lava flows entering communities was not uncommon. During the 35-year-long eruption of Pu‘u‘o‘o, on the East Rift Zone of Kilauea, lava flows caused destruction in Royal Gardens, Kalapana, and in Pahoa. Before Pu‘u‘o‘o, there were also eruptions in Kapoho Village in 1960 and on Kilauea’s lower East Rift Zone in 1955.

Ten years ago, inflation at Pu‘u‘o‘o in May and June lead to a new eruptive episode on the northeast flank of the cone. It was informally named episode 61e, but more commonly referred to as the June 27 flow in reference to the start date of that episode in 2014.

In the first few days, four fissures produced channelized flows before the eruption focused at the lowest elevation vent, where a perched pond began to form. The pond elevation continued to rise until it was about 30 meters (100 ft) higher than the vent. On July 10, pressure from the perched pond triggered the eruptive vent to shift to the next highest fissure and abandon the perched pond.

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The change in eruptive vent produced a fast-moving channelized flow that traveled up to several hundred meters (yards) per day. The flow continued to the northeast until it extended across the eastern edge of the Pu‘u‘o‘o flow field by the beginning of August.

On August 18, the lava entered into a deep ground crack that directed the flow further to the northeast. After about a week the lava overflowed from the crack, before repeating this pattern at three additional and parallel ground cracks. The flow traveled roughly 5 km (3 mi) underground in these cracks to within about 1.2 km (0.7 mi) of Ka‘ohe Homesteads subdivision where the lava exited the final crack in early September.

The flow front advanced slow and steadily during the first few weeks of September, passing Ka‘ohe Homesteads to the northwest. Then from late-September to early-October, the lava flow’s rate of advance began to fluctuate as it stalled and advanced. Towards the end of October, a breakout surged through a narrow drainage and crossed Cemetery Road in Pahoa. The flow continued through the Pahoa Japanese Cemetery, through private property, and destroyed one structure, stalling only 155 m (510 ft) from Pahoa Village Road.

A large breakout on November 14 occurred roughly 6.5 km (4 mi) upslope of the flow front, and rapidly advanced along the northwest margin of the previous flow, ultimately headed towards Pahoa Marketplace and Highway 130. The flow front again stalled on December 30 after advancing to within 530 m (0.3 mi) of the marketplace. That was the furthest the lava flow advanced, but numerous breakouts just upslope continued to threaten Pahoa until early 2015.

Episode 61e, or the June 27 flow, then retreated upslope and stayed within about 8 km (5 mi) of Pu‘u‘o‘o. This episode continued until early June 2016, when inflation at Pu‘u‘o‘o culminated in two new eruptive vents on the northeast (episode 61f) and southeast (episode 61g) flanks of the cone on May 24.

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The episode 61f flow was short-lived, lasting less than two weeks. However, the 61g flow remained active until the Pu‘u‘o‘o crater floor collapsed on April 30, 2018, followed by the intrusion of magma into the lower East Rift Zone and subsequent eruption.

Since then, eruptions from Kilauea have fortunately been confined within Kaluapele (Kilauea caldera) or other remote areas of Hawaii Volcanoes National Park. Currently, there are no signs of magma moving into the East Rift Zone but that will inevitably happen again someday. The Pahoa lava flow crisis and other destructive East Rift Zone eruptions are reminders that communities on or near the rift zone are vulnerable. Residents and visitors should stay informed and remember that it’s never too early consider how an eruption could impact you and your family.

Volcano
activity updates

Kilauea is not erupting. Its USGS Volcano Alert level is ADVISORY.

Kilauea erupted briefly on June 3 southwest of Kaluapele (Kilauea caldera) within the closed area of Hawaii Volcanoes National Park. Sulfur dioxide emission rates remain elevated; an emission rate of 350 tonnes per day was measured on June 10, for the combined areas of Kilauea summit and the recent eruption. Seismicity in the summit region, including the upper East Rift Zone, has been slightly elevated with about 550 events over the past week. Inflationary ground deformation has continued in the summit region. Additional pulses of seismicity and deformation could result in new eruptive episodes within the area or elsewhere on the Southwest Rift Zone.

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Mauna Loa is not erupting. Its USGS Volcano Alert Level is at NORMAL.

Webcams show no signs of activity on Mauna Loa. Summit seismicity has remained at low levels over the past month. Ground deformation indicates continuing slow inflation as magma replenishes the reservoir system following the 2022 eruption. SO2 emission rates are at background levels.

One earthquake was reported felt in the Hawaiian Islands during the past week: a M3.4 earthquake 14 km (8 mi) S of Volcano at 1 km (1 mi) depth on June 6 at 12:29 p.m. HST.

HVO continues to closely monitor Kilauea and Mauna Loa.

Please visit HVO’s website for past Volcano Watch articles, Kilauea and Mauna Loa updates, volcano photos, maps, recent earthquake information, and more. Email questions to askHVO@usgs.gov.

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Volcano Watch is a weekly article and activity update written by U.S. Geological Survey Hawaiian Volcano Observatory scientists and affiliates.





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No. 3 Rainbow Warriors continue winning ways against No. 6 BYU | Honolulu Star-Advertiser

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No. 3 Rainbow Warriors continue winning ways against No. 6 BYU | Honolulu Star-Advertiser


The third-ranked Hawaii men’s volleyball team had no problem recording its 11th sweep of the season, handling No. 6 BYU 25-18, 25-21, 25-16 tonight at Bankoh Arena at Stan Sheriff Center.

A crowd of 6,493 watched the Rainbow Warriors (14-1) roll right through the Cougars (13-4) for their 11th straight win.

Louis Sakanoko put down a match-high 15 kills and Adrien Roure added 11 kills in 18 attempts. Roure has hit .500 or better in three of his past four matches.

Junior Tread Rosenthal had a match-high 32 assists and guided Hawaii to a .446 hitting percentage.

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UH hit .500 in the first set, marking the third time in two matches against BYU it hit .500 or better in a set.

Hawaii has won seven of the past eight meetings against the Cougars (13-4), whose only two losses prior to playing UH were in five sets.

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Hawaii has lost six sets all season, with five of those sets going to deuce.

UH returns to the home court next week for matches Wednesday and Friday against No. 7 Pepperdine.




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Travelers Sue: Promises Were Broken. They Want Hawaiian Airlines Back.

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Travelers Sue: Promises Were Broken. They Want Hawaiian Airlines Back.


Hawaiian Airlines’ passengers are back in federal court trying to stop something most people assumed was already finished. They are no longer arguing about whether they are allowed to sue. They are now asking a judge to intervene and preserve Hawaiian as a standalone airline before integration advances to a point this spring where it cannot realistically be reversed.

That approach is far more aggressive than what we covered in Can Travelers Really Undo Alaska’s Hawaiian Airlines Takeover?. The earlier round focused on whether passengers had standing and could amend their complaint. This court round focuses on whether harm is already occurring and whether the court should act immediately rather than later. The shift is moving from procedural survival to emergency relief, which makes this filing different for Hawaii travelers.

The post-merger record is now the focus.

When the $1.9 billion acquisition closed in September 2024, the narrative was straightforward. Hawaiian would gain financial stability. Alaska would impose what it described early as “discipline” across routes and costs. Travelers were told they would benefit from broader connectivity, stronger loyalty alignment, and long-term fleet investments that Hawaiian could no longer fund independently.

Eighteen months later, the plaintiffs argue that the outcome has not matched the pitch. They cite reduced nonstop options on some Hawaii mainland routes, redeye-heavy return schedules that many readers openly dislike, and loyalty program changes that longtime Hawaiian flyers say diminished redemption value. They frame these not as routine airline integration but as signs that competitive pressure has weakened in our island state, where airlift determines price and critical access for both visitors and residents.

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What is different about this filing compared with earlier debates is that it relies on developments that have already occurred rather than on predictions about what might happen later.

The HA call sign has already been retired. Boston to Honolulu was cut before competitors signaled renewed service. Austin’s nonstop service ended. Multiple mainland departures shifted into overnight red-eyes. And next, the single reservation system transition is targeted for April 2026, a process already well underway.

Atmos replaced both Hawaiian Miles and Alaska’s legacy loyalty programs, and readers immediately reported higher award pricing, fewer cheap seats, no mileage upgrades, and confusion around status alignment and family accounts. Each of those events can be described as aspects of integration mechanics, but together they form the factual record that the plaintiffs are now asking a judge to examine in Yoshimoto v. Alaska Airlines.

The 40% capacity argument.

One of the more interesting claims tied to the court filing is that Alaska now controls more than 40% of Hawaii mainland U.S. capacity. That figure strikes at the core of the entire issue. That percentage does not automatically mean monopoly under antitrust law, but it does raise questions about concentration in a state that depends exclusively on air access for its only industry and its residents.

Hawaii is not a region where travelers have options. Every visitor, every neighbor island resident, and every business traveler depends on our limited air transportation. The plaintiffs contend that consolidation at that scale reduces competitive pressure and gives the dominant carrier far more leverage over pricing and scheduling decisions. Alaska says that competition remains robust from Delta, United, Southwest, and others, and that share shifts seasonally and by route.

Competitors reacted quickly.

While Alaska integrated Hawaiian’s network under its publicly stated discipline strategy, Delta announced its largest Hawaii winter schedule ever, beginning in December 2026. Delta’s Boston to Honolulu is slated to return, Minneapolis to Maui launches, and Detroit and JFK to Honolulu move to daily service. Atlanta also gains additional frequency. Widebodies are appearing where narrowbodies once operated, signaling Delta’s push into higher capacity and premium cabin layouts.

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Those moves complicate the monopoly narrative. If Delta is expanding aggressively, one argument is that competition remains active and responsive. At the same time, Delta filling routes Alaska trimmed may reinforce the idea that structural changes created openings competitors believe are profitable, and that markets respond when gaps appear.

What changed since October.

In October, we examined whether the case would survive dismissal and whether passengers could refile. That moment felt more procedural than what’s afoot now. It did not alter flights, fares, or loyalty programs.

This filing is different because it is tied to post-merger developments and seeks emergency relief. The plaintiffs are asking the court to prevent further integration while the merits are evaluated, arguing that each added step toward full consolidation this spring makes reversal less feasible as systems merge, crew scheduling aligns, fleet plans shift, and branding converges.

Airline mergers are designed to become embedded quickly, and once those pieces are fully intertwined, unwinding them becomes exponentially more difficult, which is why the plaintiffs are pressing forward now rather than waiting any longer.

The DOT conditions and the defense.

When the purchase of Hawaiian closed, the Department of Transportation imposed conditions that run for six years. Those conditions addressed maintaining capacity on overlapping routes, preserving certain interline agreements, protecting aspects of loyalty commitments, and safeguarding interisland service levels.

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Alaska will point to those commitments as evidence that consumer protections were built into the core approval. The plaintiffs, however, are essentially claiming that those conditions are either insufficient or that subsequent real-world changes undermine the spirit of what travelers were told would remain. That tension between formal commitments and actual experience is at the core of this dispute.

Hawaiian had not produced consistent profits for years.

That is the actual financial situation, without sentiment. Alaska did not spend $1.9 billion to preserve Hawaii nostalgia. It purchased aircraft, an international and trans-Pacific network reach, and a platform it thinks can return to profitability under tighter cost control.

What this means for travelers today.

Nothing about your Hawaiian Airlines ticket changes because of this filing. Flights remain scheduled. Atmos remains the reward program. Integration continues unless a judge intervenes.

However, Alaska now faces a renewed court challenge that points to concrete post-merger developments rather than speculative harm. That scrutiny alone can bring things to light and influence how aggressively future route decisions and loyalty adjustments occur.

Hawaiian Airlines’ travelers have been vocal since the start about pricing, redeyes, lost nonstops, and loyalty devaluation. Others have said very clearly that without Alaska, Hawaiian might not exist in any form at all. Both perspectives exist as background while a federal judge evaluates whether the integration should be impacted.

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You tell us: Eighteen months after Alaska took over Hawaiian, are your Hawaii flights better or worse than before, and what changed first for you: price, schedule, routes, interisland flights, or loyalty programs?

Lead Photo Credit: © Beat of Hawaii at SALT At Our Kaka’ako in Honolulu.

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Lawsuit claims Hawaiian-Alaska Airlines merger creates monopoly on Hawaii flights

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Lawsuit claims Hawaiian-Alaska Airlines merger creates monopoly on Hawaii flights


HONOLULU (HawaiiNewsNow) – An effort to break up the Hawaiian and Alaska Airlines merger is heading back to court.

Passengers have filed an appeal seeking a restraining order that would preserve Hawaiian as a standalone airline.

The federal government approved the deal in 2024 as long as Alaska maintained certain routes and improved customer service.

However, plaintiffs say the merger is monopolizing the market, and cite a drop in flight options and a rise in prices.

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According to court documents filed this week, Alaska now operates more than 40% of Hawaii’s continental U.S. routes.

Hawaii News Now has reached out to Alaska Airlines and is awaiting a response.

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