Seasonal Snow Cycles and Their Possible Influence on Seismic Velocity Changes and Eruptive Activity at Ruapehu Volcano, New Zealand

Journal of Geophysical Research Solid Earth, Год журнала: 2024, Номер 129(12)

Опубликована: Дек. 1, 2024

Abstract Understanding volcanic eruption triggers is critical toward anticipating future activity. While internal magma dynamics typically receive more attention, the influence of external processes remains less understood. In this context, we explore relationship between seasonal snow cycles and eruptive activity at Ruapehu, New Zealand. This motivated by apparent seasonality in record, where a higher than expected proportion eruptions (post‐1960) occur spring (including two previous 2006 2007). Employing recent advancements passive seismic interferometry, compute sub‐surface velocity changes 2005 2009 using cross‐wavelet transform approach. Stations on volcano record winter, closely correlated with presence snow. Inverting for depth suggests these within upper 300 m. Notably, observe that timing coincides period associated an earlier decrease approximately 200–300 m relative to surface. Reduced water infiltration (as precipitation falls as snow) considered likely control velocities, while modeling also points contribution from snow‐loading. We hypothesize latter process may play role explaining record. Our findings shed light complex interactions volcanoes environmental processes, highlighting need focused research area. Pursuing line inquiry has significant implications improved risk hazard assessments not just but other globally experience cover.

Язык: Английский

Seismic velocity changes from repetitive seismicity at Mauna Loa prior to and during its 2022 eruption

Bulletin of Volcanology, Год журнала: 2024, Номер 87(1)

Опубликована: Дек. 26, 2024

Язык: Английский