When another MISC@1 volcano , the LOCATION@1 , erupted in April NUMBER@1 , thousands of people were evacuated because volcanologists worried that the eruption could be another `` Nevado del Ruiz '' .

In April NUMBER@1 , the Nevado del LOCATION@2 volcano erupted , and thousands were evacuated . Volcanologists were worried that this could be another `` Nevado del Ruiz '' .
