LA PALMA—The Cumbre Vieja volcano on the Canary Island of La Palma fell silent as constant tremors stopped late on Monday, though experts cautioned this did not necessarily mean the eruption is nearing an end after 85 days. Seismic activity on the island all but stopped around 9 pm local time on Monday, The Canary Islands Volcanology Institute, Involcan, said on Tuesday. It’s the longest period without tremors since the eruption began. “This does not imply the eruption is ending, since on other occasions halts were followed by a renewed increase in activity,” Involcan said on its twitter account. It added footage of the Cumbre Vieja showing how the almost constant roaring of the volcano had ceased. The eruption, which has sent rivers of molten lava running down the slopes of Cumbre Vieja for weeks, is the longest-running on the Spanish Canary Island since records began in 1500. The quiet …