July 1 - Spasmodic Tremor Again

On July 1, 2019, three separate volcanic spasmodic tremor events were detected at the usual depth and location as past spasmodic tremor. I have talked about these many times in previous videos and blog posts. These are occurring because of mass magma transport along the mantle plume conduit. It has been less than a week since the last spasmodic tremor "swarm". Uplift also continues at the Mauna Loa summit, the Kilauea summit, and along the Kilauea East Rift Zone. There is a great deal of magma that is feeding the many sub-surface magma reservoirs on the Big Island of Hawaii.

As usual, please click the title of this post or "read more" to continue...

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Reported epicenters of earthquakes that occurred as part of the July 1, 2019 sequence of spasmodic tremor.

Locations of seismic stations I will use for the following plots.

VOLCANO ALERT: Mauna Loa, the largest active volcano on our planet, which resides in Hawaii, has been showing signs of increased volcanic unrest. Therefore, the alert level has been raised to ADVISORY and the aviation color code has been raised to YELLOW. Please CLICK HERE to keep up on the alerts posted by the HVO regarding Mauna Loa's current level of volcanic unrest.

USGS EQ Map

Hawaii Station Locations

First off, the USGS EQ map button above will bring you to reported seismicity from USGS for July 1, 2019. The station locations button above will also show you all active seismic stations on the Big Island of Hawaii.

July 1, 2019 saw three spasmodic tremor events, still occurring because of magmatic activity within the deep mantle plume under the Big Island of Hawaii. The 2nd spasmodic tremor of this day was one of the largest and longest spasmodic tremor events as of this year, 2019. Uplift continues for the Mauna Loa summit, which is experiencing heightened unrest, the Kilauea summit, and the Kilauea East Rift Zone.

As usual, I will show seismic plots pertaining to these events from the 4 stations labeled on the map above. I will also include seismic audio for all 3 spasmodic tremor events for this day. In regards to seismic audio, please use your headphones to hear it best. However, please be wary of the volume just in case! Seismic audio is obtained from IRIS and will always be sped up quite a bit to make the frequencies audible to the human ear. Enjoy!

July 1, 2019 Helicorders

Event #1

Event #1 occurred at 4:36UTC and lasted approximately 24 minutes.

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Event #2

Event #2 was the largest of today and is one of the largest and longest spasmodic tremor episodes of this year. This spasmodic tremor event occurred at 20:13UTC and lasted an astonishing 1 hour and 11 minutes!

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Event #3

Event #3 was the last event of this day. It was quite strong as well, however it was far more emergent and "tremor-like" than many recent spasmodic tremor episodes. This event started at about 21:41UTC and lasted approximately 46 minutes.