Mw 7.5 just east of New Caledonia Now - 05 Dec 2018

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In summary, "Mw 7.5" refers to the moment magnitude of a major earthquake that occurred just east of New Caledonia on December 5, 2018 at 6:43am local time. The duration of the earthquake is unknown, but it is estimated to have lasted a few seconds. While there have been no reports of significant damage or casualties, the Pacific Tsunami Warning Center did issue a tsunami warning for areas within 1000 kilometers of the epicenter, which was later cancelled with no reported tsunami.
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map of the earlier aftershocks ... I have labelled many of them

upload_2018-12-6_19-7-53.png
 

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Raw seismogram of the M7.5 showing P and S arrivals

181205  UT Mw7.5 arrivals.GIF
 

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1. What does "Mw 7.5" mean in reference to the earthquake in New Caledonia?

"Mw" stands for moment magnitude, which is a measure of the size or strength of an earthquake. A magnitude 7.5 earthquake is considered a major earthquake and can cause significant damage.

2. Where exactly did the earthquake occur?

The earthquake occurred just east of New Caledonia, which is a French territory in the Pacific Ocean. It was located about 168 kilometers east of Tadine, the capital of the Loyalty Islands province.

3. When did the earthquake happen and how long did it last?

The earthquake occurred on December 5, 2018. The exact time of the earthquake was at 6:43am local time. The duration of the earthquake is not specified, but it likely lasted for a few seconds.

4. Was there any significant damage caused by the earthquake?

At this time, there are no reports of significant damage or casualties caused by the earthquake. However, it is still early and more information may become available as assessments are conducted.

5. Is there a risk of a tsunami following this earthquake?

The Pacific Tsunami Warning Center did issue a tsunami warning for the areas within 1000 kilometers of the earthquake's epicenter. However, the warning was later cancelled and no tsunami has been reported at this time.

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