M6.3, 6.4 -- a double whammy E of New Caledonia

  • Thread starter davenn
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In summary, there was a sequence of earthquakes with magnitudes of M 6.3 and M 6.4, along with multiple aftershocks, occurring 167km and 170km east-southeast of Tadine, New Caledonia. These events were classified as separate earthquakes due to their distinct P and S wave generation and arrivals. The M 6.3 is considered a foreshock and the M 6.4 the main shock. Despite their large amplitudes, they were listed as 6.3 and 6.4 respectively.
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davenn
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M 6.3 - 170km ESE of Tadine, New Caledonia

M 6.4 - 167km E of Tadine, New Caledonia

and a bunch of aftershocks following shortly after ...

5.8, 5.1, 5.2, 5.4

181016 UT M6.3 and 6.4 New Calidonia zhi.gif

upload_2018-10-16_12-58-17.png

Cheers
Dave
 

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  • #2
So why aren't these classified as the same earthquake? Too much time between them?
 
  • #3
Drakkith said:
So why aren't these classified as the same earthquake?

because, tho they are in the same area, they are two very clearly separate and identifiable events, just as all the aftershocks that follow.
Drakkith said:
Too much time between them?

No, even with them being much closer in time, than the 35 minutes they were, it wouldn't matter as long as separate P and S
wave generation and arrivals can be identified.

With this sequence, the M 6.3 can be classed as a foreshock and the M 6.4 as the main shock.
(on a side note, I am quite surprised that they only got 6.3 and 6.4 considering the amplitude.
I have seen similar amplitude events from that area listed in the high 6's (6.6 - 6.9))Dave
 
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What is M6.3 and M6.4?

M6.3 and M6.4 refer to two separate earthquakes that occurred in close proximity to each other near New Caledonia. The M6.3 earthquake had a magnitude of 6.3 on the Richter scale, while the M6.4 earthquake had a magnitude of 6.4.

What is the significance of a double whammy earthquake?

A double whammy earthquake refers to two significant earthquakes occurring in the same location within a short period of time. This can be a cause for concern as it may indicate increased seismic activity and the potential for further earthquakes in the area.

Where is New Caledonia located?

New Caledonia is an archipelago located in the South Pacific Ocean, approximately 1,200 km east of Australia. It is a French territory and home to a population of around 280,000 people.

What caused the double whammy earthquakes in New Caledonia?

The exact cause of the earthquakes is still being studied, but it is believed that they were the result of tectonic plate movement. New Caledonia is located on the Pacific Ring of Fire, an area known for frequent seismic and volcanic activity.

Were there any damages or injuries from the earthquakes?

As of now, there have been no reports of significant damages or injuries from the M6.3 and M6.4 earthquakes in New Caledonia. However, the situation is still being monitored and it is always important to take necessary precautions during and after an earthquake.

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