Dr Geoff Lerner

@tyranakisaurus.bsky.social

Profesor Investigador en el IPICYT, doctor of volcanic rock magnets, hiker, bird-liker, cooker/baker, tennis player, Spanish speaker, he/him, Ace.

Si vas a asistir al congreso #RAUGM2026 en octubre, considera la posibilidad de apuntarte a nuestro curso sobre cómo aplicar técnicas paleomagnéticas al estudio de los volcanes. (O, si conoces a alguien que vaya a asistir y pueda estar interesado, ¡compártelo!).

Flyer que explica los contenidos del curso CU10: Aplicación de métodos paleomagnéticos al estudio de depósitos volcánicos, que se llevará a cabo durante el congreso Reunión Anual de la Unión Geofísica Mexicana en Puerto Vallarta durante la semana 26-30 de octubre.

New paper! What kind of impacts does volcanic ashfall have on airport operations? We compiled as many events as possible over the past ~80 years to look at the relationship between ashfall thickness at an airport during an eruption and what kind of impacts it causes. doi.org/10.1186/s136...

Impacts-based analysis of disruption to airport operations by volcanic ashfall - Journal of Applied Volcanology

Volcanic ash is a significant hazard to aviation due to its potential to cause physical impacts and disrupt aviation networks through airspace and airport closures. Until now, ashfall impacts on airport operations have received much less attention than airborne ash impacts on aircraft and aviation. The time and resources taken to remove ashfall from runways and airport infrastructure can cause extended disruption to the aviation network beyond the presence of ash in the atmosphere. Using publicly available information, we have compiled a global dataset of 334 volcano-related airport impact events between 1944 and 2024. The dataset includes events at 141 unique airports in 44 different countries and territories, caused by eruptions from 73 different volcanoes. The countries with the most events are Indonesia (52), Mexico (27), and New Zealand (27), and the most impacted airports are Catania-Fontanarossa International Airport (20), Puebla International Airport (15), and La Nubia Airport (12). The volcanoes responsible for the most airport impact events (besides Eyjafjallajökull) are Etna (24), Soufriere Hills (22), and Popocatépetl (22). We used 74 data-rich, ashfall-induced events from this dataset to categorise ashfall impacts into five states of closure: <1 day, 1–2 days, > 2–7 days, > 1 week (finite), and permanent, and present fragility curves for each state. Data points are concentrated between 0.1- and 100-mm thickness such that fragility curve uncertainties are greatest at the smaller (< 0.1 mm) and larger (> 100 mm) thicknesses. The curves show that there is an > 80% probability of airport closure of any duration even for trace (defined here as 0.1 mm) amounts of ashfall. Closures of more than one day under trace ashfall are much more probable than closures lasting more than two days (30% vs. 6%, respectively), and once ashfall of 10 mm thickness is reached closures of more than two days are highly probable (> 85%). The development of continuous fragility curves from empirical airport closure data represents an advance that will prove useful for hazard management and long-term forecasting closure at airports. To illustrate the potential impacts of varying closure durations on flights and passengers, we provide a case study of the simulated closure of Ninoy Aquino International Airport in the Philippines. In addition to ashfall thickness, closure duration is affected by airport or national emergency management policies, resources available (personnel and equipment), and environmental conditions. This dataset and the derived curves provide a starting point and global evidence base for better understanding the impact of volcanic ashfall on airport operations.

doi.org

A huge thank you to our past members: Alex lezzi, Omari Graham, Sandy Drymoni, Silvia Vallejo, and Jamie Farquharson. Your involvement, leadership, and support helped shape this group into what it is today. 💫

Busco estudiantes interesados en aplicar a nuestros programas de posgrado aquí en el IPICYT, en San Luis Potosí (México). Hay oportunidades para realizar investigaciones del estudio de depósitos y secuencias volcánicas mediante paleomagnetismo. Si conoces a alguien interesado, pásale la información!

Anuncio de plazas de posgrado en el Instituto Potosino de Investigación Científica y Tecnológica en San Luis Potosí, México.

Te invitamos a participar en el proceso de selección de otoño 2025 para ingresar al posgrado en Geociencias Aplicadas del IPICYT!

Convoctatorias de Maestría y Doctorado dirigidas a aspirantes de nacionalidad mexicana y extranjera

Fecha límite para la recepción de solicitudes:
Maestría: 21 de noviembre de 2025
Doctorado: 8 de noviembre de 2025

Informes:
promocion-posgrado@ipicyt.edu.mx
coordinacion_ga@ipicyt.edu.mx

I am looking for interested students to apply for our MSc and PhD programs here at the IPICYT in San Luis Potosí (Mexico). There are opportunities for research related to the study of volcanic deposits and sequences using paleomagnetism. If you know anyone interested, pass it on!

Announcement for applications for the master's and PhD programs at the Instituto Potosino de Investigación Científica y Tecnológica in San Luis Potosí, Mexico. Translated from Spanish: We invite you to participate in the selection process for Fall 2025 to enter the postgraduate program in Applied Geosciences in the IPICYT! Call for applications for master's and doctorate for applicants of Mexican nationality and foreigners.

Deadline for reception of applications:
Master's: 21 November, 2025
PhD: 8 November, 2025

For more information:
promocion-posgrado@ipicyt.edu.mx
coordinacion-ga@ipicyt.edu.mx

Cool blog post by @smakris.bsky.social on a super collaborative project to learn more about eruptions and pyroclastic density currents at Volcán de Fuego in Guatemala. Was great to join in the field--now looking forward to helping with paleomagnetic analyses soon! www.bgs.ac.uk/news/fieldwo...

Fieldwork on Volcán de Fuego - British Geological Survey

Understanding how one of the world’s most active volcanoes builds up material, and how they collapse to feed hot flows

bgs.ac.uk

Geopeople (of any discipline)! What are your favorite or most useful phone/tablet apps to use in the field? I'm teaching about field tools and methods and want to present some modern alternatives/complements to traditional equipment! Or if anyone has ever seen a list of such apps, let me know!

Back from fieldwork in Guatemala looking at PDC deposits from Fuego for our @ukri.org project exploring generation mechanisms. We had a great time in the field as a team bringing together many skills and experiences. Excited to continue working on this also with those who weren’t in the field!

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Aloha folks! I am on the IAVCEI advisory board and welcome comments you’d like me to anonymously pass along to the executive committee about your #IAVCEI2025 experience (both positive and negative). Having concrete feedback is one of the best ways to ensure each experience is better than the last.

A little bit of news, as of last week I started as an assistant professor at the IPICYT (Instituto Potosino de Investigación Científica y Tecnología) in San Luis Potosí. Looking forward to getting to work with new people here and keep working with all the awesome people who helped me get here!

A nametag on a white wall next to a brown door. At the top, in white text on a blue background, it says “Geociencias Aplicacas IPICYT”. Below, in blue text on white, it says “Dr. Geoffrey Aaron Lerner”, and below, “Profesor Investigador Titular “A” “. Below are logos for the Mexican Government, CONACYT, and IPICYT.

I’ve worked in an all male science department for 10 years and in my experience, the men don’t even know they’re doing it. (This is not an excuse by the way, just an explanation of what I’ve observed.) Here’s what I have experienced and witnessed:

Riley Black 🏳️‍⚧️ 🦕@restingdinoface.bsky.social · last yr.

Reading a book that points out how many women go into science communication and art because they’re actively pushed out of academic science by men who then take women’s findings and ideas as their own yeah this is sounding familiar.

This proposed budget is a policy statement, not an appropriation. There are still a lot of steps and potential changes ahead before it becomes one. This is not a time to sit quietly, team. Let's go.

Navigating ADHD as a scientist: Shared tips and strategies for task and time management, including by volcanologist Lis Gallant (@bipedalmeatbag.bsky.social), whose ADHD is a superpower in the (lava🌋) field. Reporting by @plantnerd.bsky.social www.nature.com/articles/d41...

Scientists with ADHD speak up: when fire meets focus

Researchers with ADHD discuss its peaks and valleys and how they structure their work lives to succeed.

nature.com