Actividade Vulcânica 2018

MagnitudeMw 6.9
RegionISLAND OF HAWAII, HAWAII

Date time2018-05-04 22:32:55.9 UTC
Location19.46 N ; 155.06 WDepth5 km
Distances3875 km NE of Majuro, Marshall Islands / pop: 25,400 / local time: 10:32:55.9 2018-05-05
357 km SE of Honolulu, United States / pop: 372,000 / local time: 12:32:55.9 2018-05-04
30 km S of Hilo, United States / pop: 43,300 / local time: 12:32:55.9 2018-05-04
6 km S of Fern Acres, United States / pop: 1,600 / local time: 12:32:55.9 2018-05-04

https://www.emsc-csem.org/Earthquake/earthquake.php?id=663591#summary

From USGS:

“The May 4, 2018, Mw 6.9 earthquake in Hawai’i occurred as a result of reverse faulting on the south flank of Kilauea volcano, in the east rift zone. Preliminary focal mechanism solutions indicate rupture occurred on shallow dipping thrust fault striking southwest, or on a steeply dipping reverse fault striking southeast. This earthquake is directly associated with volcanic activity at Kilauea volcano, and the evolution of its rift system and volcanic edifice.”

Source: https://earthquake.usgs.gov/earthquakes/eventpage/us1000dyad#executive

Depth seems to be 5km. Kilauea lies on ocean crust.

 
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The map shows the location of the earthquakes (as of yesterday) on the deflation map. The M5+quakes are south of Pu’u’O’o, in the area of deformation that runs along the coast. Most of the earthquakes are along the upper line of the deformation.
 
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An explosion at an Alaskan volcano has prompted authorities to raise its threat level to orange.

Local seismic and infrasound sensors recorded the small explosion Friday night at Mount Cleveland, which is in the Aleutian Island range southwest of mainland Alaska, the Alaska Volcano Observatory said.

https://edition.cnn.com/2018/05/05/us/alaska-volcano/index.html
 
1868 Hawaii earthquake

1868 Hawaii earthquake

On April 2, 1868, an earthquake in this area with a magnitude estimated between 7.25 and 7.75 rocked the southeast coast of Hawaii. It triggered a landslide on the slopes of the Mauna Loa volcano, five miles (8 km) north of Pahala, killing 31 people.
A tsunami claimed 46 additional lives. The villages of Punaluʻu, Ninole, Kawaa, Honuapo, and Keauhou Landing were severely damaged.
According to one account, the tsunami "rolled in over the tops of the coconut trees, probably 60 feet (20 m) high ... inland a distance of a quarter of a mile in some places, taking out to sea when it returned, houses, men, women, and almost everything movable."

1975 Hawaii earthquake

1975 Hawaii earthquake

On November 29, 1975, a 40-mile (60 km) wide section of the Hilina Slump slid 11 feet (3 m) into the ocean, widening the crack by 26 ft (8 m).
This movement caused a 7.2 magnitude earthquake and a tsunami that reached a maximum height of 47.0 feet (14.3 m) at Keauhou Landing.[8] Oceanfront properties were washed off their foundations in Punaluʻu.
Two deaths were reported at Halape, and 19 other persons were injured. The shoreline at Keauhou Bay was dramatically altered.
 
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