NEIS is listing a Mb 5.8 in the Northern Vanuatu Islands this evening. This was one of the regions considered most likely to see such an event as an FFA in the above post:
"General:

The most likely upcoming activity would be aftershocks in the Vanuatu and Japan region and in the Hindu Kush area."

and:

"The most likely events of Mw>=5.5 (based on past occurrences)in the next 10 days appear to be:

Vanuatu Islands esp. north of 16S. (4)"

• NEIS EARTHQUAKE LISTING