Skip to main content

Posts

Showing posts with the label earthquake

Earthquake hits Alaska October 19, 2020

An earthquake with a magnitude of 7.5 on the Richter scale hit Alaska (blue circle on map) on October 19, 2020 8:54 pm UTC. The image shows a screenshot taken October 19, 2020 11:30 pm UTC featuring earthquakes over the past 7 days, with the M7.5 earthquake showing up in blue and the other earthquakes colored by age, i.e. hour (red), day (orange) and week (yellow).  Such huge earthquakes can cause tsunamis. In the Arctic, such huge earthquakes also come with the danger that they will destabilize methane hydrates at the seafloor which can cause huge amounts of methane to erupt. Shockwaves can travel along faults and cause eruptions at places far away from where the original eathquake occurred.  Ominously, the MetOp-1 satellite recorded methane levels as high as 2618 ppb on the morning of October 22, 2020 at 586 mb.  On the afternoon of October 23, 2020, the SNPP satellite recorded methane levels as high as 2735 ppb at 487.2 mb.  The situation is dire and calls fo...

Methane, Earthquake and Sudden Stratospheric Warming

On the morning of March 12, 2020, peak methane levels were as high as 2902 ppb (parts per billion) at a pressure level of 469 mb (millibar, equivalent to an altitude of some 6 km (almost 20,000 feet). What did cause this very high peak? The image on the right shows the situation at 695 mb. High levels of methane, colored in magenta, show up over the oceans at high latitudes north, especially around Greenland and around Svalbard. The image underneath on the right shows methane even closer to sea level, at 1000 mb. At this altitude, such magenta-colored high levels of methane only show up over an area in between Greenland and Svalbard. It appears that these high methane levels did originate from this area. What could have triggered this? The image below shows that an earthquake with a magnitude of 4.6 on the Richter scale hit an area in between Greenland and Svalbard on March 11, 2020, at  21:30:03 (UTC) , 2020, at depth of 10 km. It appears that the earthquake did cause de...