The temperature of the Ruapehu crater lake in New Zealand is subject to warming-cooling cycles, under the control of both volcanic and geothermal processes. On September 5, the temperature reached 43 ° C, a peak maximum of the current cycle of warming.
Temperatures oscillate according to GeoNet between 16 and 38 ° C, with average of 24 ° C, collected by probes in the lake, connected via satellite to the observatory.
A drama occurred this September 12 in the solfatare Bocca Grande of Pozzuoli, in the Phlegrean Fields near Naples.
In seeking to rescue their son into an unauthorized area, a father and his wife fell into a hole in an area of shifting terrain prone to collapse; it seems that they have succumbed to the hot gases emitted by the solfatare (steam at 160°C and toxic volcanic gases, including H2S).
The heavy rains of the past days could have played a role in creating new openings in the surface of the volcanic field.
This unfortunately reminds us of the precautions to be taken in volcanic or geothermal zone, and the risks incurred in not respecting the marked zones.
Source: Republica.it & Blick.ch
Bromo crater in the dry season in September. Most of the water on the crater floor is gone. Compare to April (below)
Two videos, taken with a drone, illustrate the Bromo crater on the Java island between April and September and its more or less important occupation by a lake whose level varies with the rate of precipitation.
Not only is the small lake of bronze color, but also the depth of the well at the bottom of the crater, and the danger presented by a descent into this crater without any means of securing it by ropes.
Source: attached videos
Full video: https://youtu.be/t7OQuEmBUuU