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There are no activity reports for Farallon de Pajaros.
Summary of eruption dates and Volcanic Explosivity Indices (VEI).
|Start Date||Stop Date||Eruption Certainty||VEI||Evidence||Activity Area or Unit|
|1967 Mar 27||1967 Apr 10||Confirmed||0||Hydrophonic||SW of Uracas (Makhahnas seamount)|
|1952 Oct 26 ± 5 days||1953 Apr 15||Confirmed||2||Historical Observations||Summit, east side|
|1951 Aug||Unknown||Confirmed||2||Historical Observations|
|1947 Jan (?)||Unknown||Confirmed||0||Historical Observations||North side|
|1943||Unknown||Confirmed||2||Historical Observations||Summit, south side|
|1941 Mar 28||Unknown||Confirmed||Historical Observations|
|1939||Unknown||Confirmed||2||Historical Observations||East side ?|
|1936 Apr 15 ± 45 days||Unknown||Confirmed||2||Historical Observations|
|1934 Jul 15 ± 45 days||Unknown||Confirmed||0||Historical Observations||Immediately south of Uracas|
|1932 Sep 7||1932 Oct 7||Confirmed||2||Historical Observations||Summit, east side ?|
|1928 Dec 15 ± 5 days||Unknown||Confirmed||2||Historical Observations|
|1912||Unknown||Confirmed||2||Historical Observations||North side ?|
|1900 (?)||1901 May||Confirmed||2||Historical Observations||Summit, east side|
|1874 (?)||1876 Jan 3 (in or after)||Confirmed||2||Historical Observations||Summit, NE side|
|[ 1865 ]||[ Unknown ]||Discredited|
|1864 Jan 7||Unknown||Confirmed||2||Historical Observations||SW side|
The following references are the sources used for data regarding this volcano. References are linked directly to our volcano data file. Discussion of another volcano or eruption (sometimes far from the one that is the subject of the manuscript) may produce a citation that is not at all apparent from the title. Additional discussion of data sources can be found under Volcano Data Criteria.
Bloomer S H, Stern R J, Smoot N C, 1989. Physical volcanology of the submarine Mariana and Volcano arcs. Bull Volc, 51: 210-224.
Corwin G, 1971. Quaternary volcanics of the Mariana Islands. Unpublished manuscript, 137 p.
Green J, Short N M, 1971. Volcanic Landforms and Surface Features: a Photographic Atlas and Glossary. New York: Springer-Verlag, 519 p.
Katsui Y (ed), 1971. List of the World Active Volcanoes. Volc Soc Japan draft ms, (limited circulation), 160 p.
Kuno H, 1962. Japan, Taiwan and Marianas. Catalog of Active Volcanoes of the World and Solfatara Fields, Rome: IAVCEI, 11: 1-332.
The small 2-km-wide island of Farallon de Pajaros (also known as Uracas) is the northernmost and most active volcano of the Mariana Islands. Its relatively frequent historical eruptions dating back to the mid-19th century have caused the andesitic volcano to be referred to as the "Lighthouse of the western Pacific." The symmetrical, sparsely vegetated summit is the central cone within a small caldera cutting an older edifice, remnants of which are seen on the SE and southern sides near the coast. Flank fissures have fed lava flows during historical time that form platforms along the coast. Both summit and flank vents have been active at Farallon de Pajaros during historical time. Eruptions have also been observed from nearby submarine vents, and Makhahnas seamount, which rises to within 640 m of the sea surface, lies about 10 km to the SW.