Available Weekly Reports
|Farallon de Pajaros|
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||Summit, east side|
|1947 Jan (?)||Unknown||Confirmed||0||Historical||North side|
|1943||Unknown||Confirmed||2||Historical||Summit, south side|
|1941 Mar 28||Unknown||Confirmed||Historical|
|1939||Unknown||Confirmed||2||Historical||East side ?|
|1936 Apr 15 ± 45 days||Unknown||Confirmed||2||Historical|
|1934 Jul 15 ± 45 days||Unknown||Confirmed||0||Historical||Immediately south of Uracas|
|1932 Sep 7||1932 Oct 7||Confirmed||2||Historical||Summit, east side ?|
|1928 Dec 15 ± 5 days||Unknown||Confirmed||2||Historical|
|1912||Unknown||Confirmed||2||Historical||North side ?|
|1900 (?)||1901 May||Confirmed||2||Historical||Summit, east side|
|1874 (?)||1876 Jan 3 (in or after)||Confirmed||2||Historical||Summit, NE side|
|1864 Jan 7||Unknown||Confirmed||2||Historical||SW side|
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.