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Imaggeo on Mondays: Moving images – Photo Contest 2016 

Since 2010, the European Geosciences Union (EGU) has been holding an annual photo competition and exhibit in association with its General Assembly and with Imaggeo – the EGU’s open access image repository. In addition to the still photographs, imaggeo also accepts moving images – short videos – which are also a part of the annual photo contest. However, 20 or more images have to be submitted to the moving image competition for an award to be granted by the judges. This year saw [...]

Living with volcanoes, and learning from the past. 

November 13th, 1985, is a date that is still etched in my memory. This was the day that the Colombian town of Armero was submerged beneath a catastrophic flood of volcanic rocks, mud and water; a lahar that had swept down from the summit of the volcano Nevado del Ruiz, erupting about 40 kilometres away. For days, terrible scenes of anguish and despair filled our television screens, as rescuers struggled desperately to help the survivors, and recover the many thousands of victims. Thirty [...]

Mount St. Helens Lays Her Eruptive History Bare: Stratigraphy Viewpoint 

Today, we're going to visit another unexpected gift of the lahar that poured from Shoestring Glacier that morning. We'll see 13,000 years of volcanic havoc laid gloriously bare. To get there, we'll... -- Read more on ScientificAmerican.com

January 26, 2015 

A Comprehensive List of Mineral, Rock, and Gem ClubsThe-Vug.com Protecting Mineral Treasures at Larsemann Hills, AntarcticaEarth Magazine Video: 2007 Lahar at Mt. Ruapehu, New ZealandGeoff Mackley Melting Glaciers Increase the Flow of Carbon to Downstream EcosystemsUnited States Geological Survey Video: Eruption and Pyroclastic Flow at Colima VolcanoMashable Layoffs Begin at Marcellus DrillersCBS Local Alaska Airlines

Friday Field Photo – St Vincent, 1902 

Today’s field photo is by Tempest Anderson, of the ‘Roseau Dry River flowing with Boiling Mud’, a picture taken in the aftermath of the May 1902 eruptions of the Soufrière of St Vincent.  The full published caption explains the origins of this boiling mud – a phenomenon we now call a lahar: ‘This is a small stream

Tower Power And An Archean Gneiss 

Yellowstone is a massive piece of real estate. With around 2.2 million acres, you could spend a lifetime here and not see it all. With that thought in mind I am doing my part to experience as much of it as I possibly can while I’m here. Tower FallsLast week I decided to burn some fossil fuel and take a drive to the Tower–Roosevelt area to have a look around outside of the caldera. I don’t get up to Tower as much as I’d like, because from Grant Village it’s nearly 60 miles and [...]

Volcanology Etymology 

Jessica Ball has a blog post that explores the origin of some of the most commonly used words in volcanology – with some great photos too! How did we get interesting words like: lahar, caldera, ignimbrite, tephra, scoria,

Activity at Nevado del Ruiz 

Erik Klemetti reports on “Increasing Volcanic Unrest Observed at Nevado del Ruiz in Columbia” the volcano that produced a lahar in 1985 that killed over 20,000

Cryptozoology and Cute Fuzzy Critters 

No, this isn't about the cat. This time. Although she's pretty crypto - I never can figure out why she goes from cuddly to homicidal with no warning, and she is cute and fuzzy. Even when she is trying to tear you limb-from-limb. We stopped at the North Fork Survivors Gift Shop at the Buried A-Frame on our way to Mount St. Helens. This is practically a requirement. First off, A-frame house buried by a lahar - tell me that doesn't attract every geologist on the planet. Secondly, Bigfoot statues. [...]

Mt. Washburn – Fifty Million Years Later 

If there were one thing I could say about all the volcanic commotion that produced the wondrousness of Yellowstone National Park, it would be that it ain’t over til it’s over. For at least the past fifty million years there has been intermittent explosive volcanism of one sort or another in this region of the western US, and I expect that there will be more to come. Not in our lifetimes, perhaps, but then again you never know…Trail to lookout tower on Mt. WashburnOn the Mt. Washburn trail [...]

Columbia Basin Trip: Day 1 - a Lahar and an Anticline 

Only now at the end of April do I have a moment to breath, as two tough terms that went by like a blur have come to their inevitable summer conclusion, and the search for work placement begins. But before the hunt begins, a getaway for a few days was what my figurative spirit called for. I'm the outdoors type (is any geoscience type not?), thus I'm allergic to staying indoors when I have some time off. After perusing through Ellen Morris Bishop's Hiking Oregon's Geology book, I was inspired to [...]

Kamera-kamera Pemantau Lahar Merapi 

Pemantauan lahar hujan secara “remote” dilakukan dalam berbagai cara. Sistem peringatan dini lahar Merapi yang sudah terpasang terdiri dari alat penakar curah hujan otomatis, kamera CCTV, dan geofon atau pemantau aliran dengan metode akustik yang masing-masing dilengkapi dengan sistem telemetri atau alat pengirim data secara otomatis ke stasiun pusat pemantau di BPPTK dan pengendali operasi

New at Erratics: from lahar to suevite 

In his second post at Earth Science Erratics Simon Wellings reveals a rather interesting deskcrop, collected from Scotland in his youth: Since it was picked up, this rock has changed identities: what was once thought to be a mud flow … Continue reading

Endapan Lahar Hujan: Dimana Diendapkan ? 

Pada prinsipnya penanggulangan lahar hujan ini adalah pengaturan sedimen. Itulah sebabnya dalam kategori penanganan di PU, lahar hujan ini masuk dalam bencana sedimen. Secara mudah sedimen itu akan mengendap ketika alirannya melambat disitulah akan terjadi sedimentasi. Dengan demikian usaha penanganannya adalah mengontrol dimana kita akan meletakkan (mendeposisikan) material-material ini. Tentusaja akan diusahakan dimana dampaknya paling

Pembentukan alur-alur baru di lereng Merapi 

Lahar hujan saat ini menjadi ancaman di sekirat lereng Merapi, terutama di seputar sungai-sungai utama yang berhulunya terdapat banyak endapan awanpanas. Kalau dilihat pada saat setelah terendapkan, maka Pembentukan alur baru di lereng selatan Merapi merupakan sebuah gejala yang tidak boleh dilewatkan begitu saja. Pengamatan perubahan morfologi sungai ini akan sangat membantu dalam mengantisipasi lahar

A Visit to White Island, New Zealand 

White Island is a stratovolcano located about 30 miles off of North Island, New Zealand. A Pittsburgh Post Gazette writer reports on her visit to the island with a tourist group. The island is uninhabited. A sulfur mine was established on the island but the mine was abandoned in 1914 when a lahar killed all

Peta antisipasi lahar hujan Merapi 

Dibawah ini beberapa peta antisipasi lahar hujan dalam berbagai bentuk dan skala.Setiap kejadian selalu memiliki info penting selain diskripsi dari fenomena itu yaitu lokasi. Lokasi inilah yang diperlukan sebagai petunjuk untuk penanganan selanjutnya. Jadi kalau ada data apa saja, jangan lupa lokasinya. Saat ini sudah ada GPS bahkan dalam handphone. Cantumkan lokasi lat-long tsb dalam

Cold Lahars Displacing People at Mount Merapi, Indonesia 

Dredging in the Code River, YogyakartaPhoto from here.Eruptions at Mount Merapi, discussed here, here, and here before in this blog, produced ash and other debris that sits atop the mountain awaiting the monsoon rains. Those rains have arrived; the wet monsoon season in Indonesia lasts from November through March. For weeks muddy torrents have been flowing down from the mountain. On November 30 an apparently big one, reported to be up to 2 meters deep, arrived. According to the [...]

Cold Lahar Floods Hundreds of Homes in Yogyakarta 

A cold lahar from Mount Merapi volcano flowed down the Code River, flooding hundreds of homes in the city of Yogyakarta, Indonesia. Related: Learn about lahars and other volcanic

Bahaya lahar hujan: erosi, sedimentasi dan suhu. 

Jogja saat ini memang sudah masuk kategori aman dari erupsi Merapi. Walaupun Merapi masih dalam status AWAS, namun erupsinya sudah dalam taraf mendarat. Mbah Rono menyebutnya taraf landing. Kalau landing ya harus mulus supaya tidak terjadi goncangan. “Safe landing, happy ending ya, Pakdhe “ “Betul Thole, saat mendarat juga kadang ada goncangan kecil itu biasa.