M5.1 earthquake · 7 km N of Balangonan, Philippines

■ Steady

Series of M5+ quakes continues, led by an M5.8 northwest of Port-Olry, Vanuatu

On Tuesday, a run of magnitude 5.0 to 5.8 earthquakes struck mostly in the southwest Pacific. The strongest was an M5.8 at 11 km depth, 196 km northwest of Port-Olry, Vanuatu, followed by several M5.0 to M5.2 shocks in the same area. Later quakes hit near Balangonan in the Philippines, west of Guam, east-northeast of Nagqu in China, and in Panama and Indonesia. Where PAGER levels were given, they were green.

• Vanuatu recorded at least four quakes of M5.0 or higher on Tuesday, all northwest of Port-Olry, with the largest at M5.8.
• On Sunday, an M6.1 at 116 km depth struck 25 km east-northeast of Port-Olry, and an M5.9 hit 218 km east-northeast of Nagqu, China.
• On Tuesday, an M5.4 struck 210 km east-northeast of Nagqu, China, in the same area as Sunday's M5.9 and M5.1.
• Other M5+ quakes this period hit Fiji, Tonga, Papua New Guinea, Indonesia, Japan's Bonin Islands, Afghanistan, Panama, Guam and the Philippines.