Debris flow on Mt. Rainier: Why volcanoes are dangerous even when not erupting
I write the Eruptions blog on Big Think. I've been mesmerized with volcanoes (and geology) all my life. It helps that part of my family comes from the shadow of Nevado del Ruiz in Colombia, where I could see first hand the deadly effects of volcanic eruptions. Since then, I've taken a bit of a winding path to become a volcanologist. I started as a history major at Williams College, almost went into radio, but ended up migrating to geology, including an undergraduate thesis on Vinalhaven Island, Maine. I followed this up by changing coast to get my Ph.D. from Oregon State University. Then I ran a MC-ICP-MS lab at University of Washington for a spell (and wrote for an indie rock website). I spent three years as a postdoctoral scholar at University of California - Davis studying the inner workings of magmatic systems. I am now an assistant professor at Denison University and have projects in New Zealand, Chile and Oregon.
I am fascinated by volcanoes, their eruptions and how those eruptions interact with the people who live around the volcanoes. I started this blog after getting frustrated with the news reports of volcanic eruptions. Most of them get the information wrong and/or are just sensationalistic. I will try to summarize eruptions as they occur, translate some of the volcanic processes that are happening and comment on the reports themselves.
And no matter what people tell you, I definitely do not have a cat named Tephra. (OK, I do).
You can find out more about my research by visiting my website. If you have any comments, questions or information, feel free to contact me at eruptionsblog at gmail dot com.
We talk a lot about the hazards that are present at Washington's Rainier mostly in terms of what might happen if the volcano erupts. However, remember that even when Rainier is showing no signs of activity, volcanic hazards can still be present (video). Case in point is the debris flow that occurred on Rainier last week. The Landslide Blog posted an excellent video of the June 25 event that seems to start as a debris avalanche/landslide but as the flow runs down the slopes of the volcano, some parts begin to appear lahar-like as meltwater from the snow, ice and glaciers on the volcano is incorporated into the flow itself. This footage is pretty spectacular as you can see the dust portion of the flow get left behind from the faster moving ground debris that runs out downslope. (And for those of you who might be curious, that initial part of the avalanche is as close to what a pyroclastic flow on Rainier might look like if you were near the summit).
A debris flow captured on video from Mt. Rainier, June 25, 2011.
Rainier has a long history of lahars (see map below), many of which are not related to volcanism - they are mostly glacially-derived meltwater releases that pick up debris along the way. This is why the volcano has a sophisticated lahar-warning system installed on the volcano as part of the hazard mitigation on the volcano because these types of lahars can occur with little-to-no warning. The lahar warning system utilizes sirens to warn the towns downvalley from Rainier that a lahar has been detected and to move to higher ground. Most of the town would have ~40 minutes (or more) to move people to safety (out of the river valleys) if a lahar is detected on the main edifice of Rainier. Usually flows like this are caused by heavy rains or melting, which prompts the collection and then release of water high on the slopes of the volcano. Rainier is also a very unstable volcano as much of the summit area has been extensively hydrothermally altered (pdf), so it is not surprising to see lahars and avalanches such as these on the volcano.
Lahar/mudflow inundation of the Rainier area over the last 5,600 years. Image courtesy of the USGS.
UPDATE 1:30 PM Eastern: Oh wow, here is a great look at the June 25 debris flow at Rainier.
Just a reminder that volcanoes are hazardous even if they haven't erupted in over a century.
Top left: Mt. Rainier in Washington.
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Political division is nothing new. Throughout American history there have been numerous flare ups in which the political arena was more than just tense but incideniary. In a letter addressed to William Hamilton in 1800, Thomas Jefferson once lamented about how an emotional fervor had swept over the populace in regards to a certain political issue at the time. It disturbed him greatly to see how these political issues seemed to seep into every area of life and even affect people's interpersonal relationships. At one point in the letter he states:
"I never considered a difference of opinion in politics, in religion, in philosophy, as cause for withdrawing from a friend."
Today, we Americans find ourselves in a similar situation, with our political environment even more splintered due to a number of factors. The advent of mass digital media, siloed identity-driven political groups, and a societal lack of understanding of basic discursive fundamentals all contribute to the problem.
Civil discourse has fallen to an all time low.
The question that the American populace needs to ask itself now is: how do we fix it?
Discursive fundamentals need to be taught to preserve free expression
In a 2017 Free Speech and Tolerance Survey by Cato, it was found that 71% of Americans believe that political correctness had silenced important discussions necessary to our society. Many have pointed to draconian university policies regarding political correctness as a contributing factor to this phenomenon.
It's a great irony that, colleges, once true bastions of free-speech, counterculture and progressiveness, have now devolved into reactionary tribal politics.
Many years ago, one could count on the fact that universities would be the first places where you could espouse and debate any controversial idea without consequence. The decline of staple subjects that deal with the wisdom of the ancients, historical reference points, and civic discourse could be to blame for this exaggerated partisanship boiling on campuses.
Young people seeking an education are given a disservice when fed biased ideology, even if such ideology is presented with the best of intentions. Politics are but one small sliver for society and the human condition at large. Universities would do well to instead teach the principles of healthy discourse and engagement across the ideological spectrum.
The fundamentals of logic, debate and the rich artistic heritage of western civilization need to be the central focus of an education. They help to create a well-rounded citizen that can deal with controversial political issues.
It has been found that in the abstract, college students generally support and endorse the first amendment, but there's a catch when it comes to actually practicing it. This was explored in a Gallup survey titled: Free Expression on Campus: What college students think about First amendment issues.
In their findings the authors state:
"The vast majority say free speech is important to democracy and favor an open learning environment that promotes the airing of a wide variety of ideas. However, the actions of some students in recent years — from milder actions such as claiming to be threatened by messages written in chalk promoting Trump's candidacy to the most extreme acts of engaging in violence to stop attempted speeches — raise issues of just how committed college students are to
upholding First Amendment ideals.
Most college students do not condone more aggressive actions to squelch speech, like violence and shouting down speakers, although there are some who do. However, students do support many policies or actions that place limits on speech, including free speech zones, speech codes and campus prohibitions on hate speech, suggesting that their commitment to free speech has limits. As one example, barely a majority think handing out literature on controversial issues is "always acceptable."
With this in mind, the problems seen on college campuses are also being seen on a whole through other pockets of society and regular everyday civic discourse. Look no further than the dreaded and cliche prospect of political discussion at Thanksgiving dinner.
Talking politics at Thanksgiving dinner
As a result of this increased tribalization of views, it's becoming increasingly more difficult to engage in polite conversation with people possessing opposing viewpoints. The authors of a recent Hidden Tribes study broke down the political "tribes" in which many find themselves in:
- Progressive Activists: younger, highly engaged, secular, cosmopolitan, angry.
- Traditional Liberals: older, retired, open to compromise, rational, cautious.
- Passive Liberals: unhappy, insecure, distrustful, disillusioned.
- Politically Disengaged: young, low income, distrustful, detached, patriotic, conspiratorial
- Moderates: engaged, civic-minded, middle-of-the-road, pessimistic, Protestant.
- Traditional Conservatives: religious, middle class, patriotic, moralistic.
- Devoted Conservatives: white, retired, highly engaged, uncompromising,
Understanding these different viewpoints and the hidden tribes we may belong to will be essential in having conversations with those we disagree with. This might just come to a head when it's Thanksgiving and you have a mix of many different personalities, ages, and viewpoints.
It's interesting to note the authors found that:
"Tribe membership shows strong reliability in predicting views across different political topics."
You'll find that depending on what group you identify with, that nearly 100 percent of the time you'll believe in the same way the rest of your group constituents do.
Here are some statistics on differing viewpoints according to political party:
- 51% of staunch liberals say it's "morally acceptable" to punch Nazis.
- 53% of Republicans favor stripping U.S. citizenship from people who burn the American flag.
- 51% of Democrats support a law that requires Americans use transgender people's preferred gender pronouns.
- 65% of Republicans say NFL players should be fired if they refuse to stand for the anthem.
- 58% of Democrats say employers should punish employees for offensive Facebook posts.
- 47% of Republicans favor bans on building new mosques.
Understanding the fact that tribal membership indicates what you believe, can help you return to the fundamentals for proper political engagement
Here are some guidelines for civic discourse that might come in handy:
- Avoid logical fallacies. Essentially at the core, a logical fallacy is anything that detracts from the debate and seeks to attack the person rather than the idea and stray from the topic at hand.
- Practice inclusion and listen to who you're speaking to.
- Have the idea that there is nothing out of bounds for inquiry or conversation once you get down to an even stronger or new perspective of whatever you were discussing.
- Keep in mind the maxim of : Do not listen with the intent to reply. But with the intent to understand.
- We're not trying to proselytize nor shout others down with our rhetoric, but come to understand one another again.
- If we're tied too closely to some in-group we no longer become an individual but a clone of someone else's ideology.
Civic discourse in the divisive age
Debate and civic discourse is inherently messy. Add into the mix an ignorance of history, rabid politicization and debased political discourse, you can see that it will be very difficult in mending this discursive staple of a functional civilization.
There is still hope that this great divide can be mended, because it has to be. The Hidden Tribes authors at one point state:
"In the era of social media and partisan news outlets, America's differences have become
dangerously tribal, fueled by a culture of outrage and taking offense. For the combatants,
the other side can no longer be tolerated, and no price is too high to defeat them.
These tensions are poisoning personal relationships, consuming our politics and
putting our democracy in peril.
Once a country has become tribalized, debates about contested issues from
immigration and trade to economic management, climate change and national security,
become shaped by larger tribal identities. Policy debate gives way to tribal conflicts.
Polarization and tribalism are self-reinforcing and will likely continue to accelerate.
The work of rebuilding our fragmented society needs to start now. It extends from
re-connecting people across the lines of division in local communities all the way to
building a renewed sense of national identity: a bigger story of us."
We need to start teaching people how to approach subjects from less of an emotional or baseless educational bias or identity, especially in the event that the subject matter could be construed to be controversial or uncomfortable.
This will be the beginning of a new era of understanding, inclusion and the defeat of regressive philosophies that threaten the core of our nation and civilization.
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