Volcanos

Roundup of Global Volcanic Activity

Telica (Nicaragua): During the past days(in particular since 6 May), activity of the volcano seems to have increased. The nightly glow from the crater has become stronger and intermittent weak ash emissions also occurred in the past days. These occasional ash plumes, brownish in colour, appeared to have risen calmly from the crater (without much impulse). Hence, they were probably not driven by near-surface explosions, but rather deep-seated activity inside the conduit; their brownish colour furthermore suggests that the ash came mainly from older fragmented rock instead of fresh magma, although this is difficult to judge from webcam imagery alone.

Turrialba (Costa Rica): After another series of ash emissions yesterday morning the volcano has been calmer today today and only produced a variable steam plume. According to RSN, this was accompanied by a significant decrease in seismic activity after 10 am local time yesterday, suggesting that internal pressure has dropped although some episodes of weak volcanic tremor were still being detected. Whether or how long this phase of relative calm continues is impossible to predict.