Mag. 7 Indonesia Earthquake - 5th August 2018

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Discussion Overview

The discussion centers around the magnitude 7 earthquake that struck Lombok, Indonesia, on August 5, 2018, and its subsequent aftershocks. Participants share information about the earthquake's impact, including casualties, aftershocks, and seismic activity in the region, as well as personal experiences related to the event.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant reports that thirty-nine people died due to the earthquake and mentions a tsunami warning issued shortly after.
  • Another participant shares a personal connection, noting that a government official was in a hotel on the island during the quake.
  • A participant discusses the frequency of magnitude 7 earthquakes, stating that the current year's count is below long-term averages, with only five events so far.
  • Aftershocks are reported, including a significant M 5.9 aftershock, with details about its location and depth provided by a participant.
  • There are conflicting reports about the magnitude of aftershocks, with one participant noting a discrepancy in reported magnitudes between sources.
  • Another participant references a news article about a series of earthquakes in Lombok, including a major quake that resulted in fatalities and significant damage.

Areas of Agreement / Disagreement

Participants express varying views on the magnitude and impact of the earthquakes and aftershocks, with some discrepancies noted in reported magnitudes. The discussion includes both personal accounts and technical observations, indicating that multiple perspectives are present without a clear consensus.

Contextual Notes

Participants reference various sources for earthquake data, which may lead to differences in reported magnitudes and details. The discussion reflects ongoing seismic activity in the region and the emotional responses of those connected to the affected areas.

StevieTNZ
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Thirty nine people have died after a powerful earthquake rocked the Indonesian tourist islands of Lombok and neighbouring Bali, triggering a tsunami warning just a week after another quake in the same region killed 16 people.

The magnitude seven earthquake hit about 6.46pm Jakarta time (11.46pm NZ) on Sunday, 27 kilometres north-east of northern Lombok in Indonesia at a 15-kilometre depth.

https://www.stuff.co.nz/world/asia/...and-indonesian-officials-say-tsunami-possible
 
Earth sciences news on Phys.org
That's first M7 event since Feb 2018

The USGS have down graded it to 6.9

The count for M7.0 - 7.9 events this year is well down on the long term averages.
By now there should have been around 10 - 12 in that range there have been only 5 and they were all back in Jan and Feb.
18 / year is the long term avg.

M6.0 - 6.9 events are also well down compared to the averages. So far 49 for the year.
The annual avg is around 130

So far there hasn't been the M8+ event for the year eitherfrom my seismograph
http://www.sydneystormcity.com/seismograms.htm

zhi.gif


cheers
Dave
 

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I just got back last week from Bali. I've been messaging a lot of friends I made over there.
 
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Greg Bernhardt said:
I just got back last week from Bali. I've been messaging a lot of friends I made over there.
Everyone alright?
 
The aftershocks continue on Lombok Island.
As I am typing this the latest respectable ( and largest, so far) aftershock is tailing off.

M 5.9, 3km SE of Todo, Indonesia
2018-08-09 05:25:31 (UTC), 10.0 km deep

The red dot on the map

This is about 40km WSW of the M6.9 main shock

I have taken the USGS base map and added the event magnitudes to it...

upload_2018-8-9_16-14-46.png


apologies for the low quality image
the forum does a lot of compression

cheers
Dave
 

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davenn said:
it was only a 5.9 as stated above and in that article :smile:
Stuff must have updated the article to 5.9.
 
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  • #10
Seismogram for the M 5.9 aftershock

180809 UT M 5.9 ashk Lombok eastern Indonesia zhi2.gif
 

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  • #11
And again:
Lombok in Indonesia has been hit by another series of earthquakes - including a major 6.9 magnitude quake - which left one person dead and caused others to run out into the streets in panic.

The latest tremors arrived two weeks after a 7.0-magnitude earthquake killed 460 people on the island and caused damage worth more than 5 trillion rupiah (£268 million).
https://www.independent.co.uk/news/...-lombok-island-second-magnitude-a8498406.html
 
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