Available Weekly Reports
| Orizaba, Pico de |

There are no activity reports for Orizaba, Pico de.
Summary of eruption dates and Volcanic Explosivity Indices (VEI).
| Start Date | Stop Date | Eruption Certainty | VEI | Evidence | Activity Area or Unit |
|---|---|---|---|---|---|
| 1846 | Unknown | Confirmed | 2 | Historical | |
| 1687 | Unknown | Confirmed | 2 | Historical | |
| 1613 | Unknown | Confirmed | 0 | Historical | |
| 1569 | 1589 | Confirmed | 2 | Historical | |
| 1566 | Unknown | Confirmed | 2 | Historical | |
| 1545 | 1555 ± 10 years | Confirmed | 2 | Historical | |
| [ 1533 ] | [ 1539 ] | Uncertain | 2 | ||
| [ 1351 ] | [ Unknown ] | Uncertain | 2 | ||
| 1260 ± 50 years | Unknown | Confirmed | 3 | Radiocarbon (uncorrected) | |
| [ 1187 ] | [ Unknown ] | Uncertain | 2 | ||
| 1175 | Unknown | Confirmed | 3 | Anthropology | |
| [ 1157 ] | [ Unknown ] | Uncertain | 2 | ||
| 220 ± 75 years | Unknown | Confirmed | 3 | Radiocarbon (uncorrected) | |
| 140 ± 50 years | Unknown | Confirmed | 3 | Radiocarbon (uncorrected) | |
| 90 ± 40 years | Unknown | Confirmed | 3 | Radiocarbon (uncorrected) | |
| 40 ± 40 years | Unknown | Confirmed | 3 | Radiocarbon (uncorrected) | |
| 780 BCE ± 50 years | Unknown | Confirmed | 3 | Radiocarbon (uncorrected) | |
| 1500 BCE ± 75 years | Unknown | Confirmed | 3 | Radiocarbon (uncorrected) | |
| 2110 BCE ± 100 years | Unknown | Confirmed | 3 | Radiocarbon (uncorrected) | |
| 2300 BCE ± 75 years | Unknown | Confirmed | 4 | Radiocarbon (uncorrected) | La Perla unit |
| 2500 BCE ± 75 years | Unknown | Confirmed | 3 | Radiocarbon (uncorrected) | |
| 2780 BCE ± 75 years | Unknown | Confirmed | 3 | Radiocarbon (uncorrected) | |
| 4690 BCE ± 300 years | Unknown | Confirmed | 3 | Radiocarbon (uncorrected) | |
| 6220 BCE ± 75 years | Unknown | Confirmed | 3 | Radiocarbon (uncorrected) | |
| 6710 BCE ± 150 years | Unknown | Confirmed | 5 | Radiocarbon (uncorrected) | Upper Citlaltépetl ignimbrite |
| 7030 BCE ± 50 years | Unknown | Confirmed | 4 | Radiocarbon (uncorrected) | Lower Citlaltépetl ignimbrite |
| 7530 BCE ± 40 years | Unknown | Confirmed | Radiocarbon (uncorrected) |
Pico de Orizaba (Volcán Citlaltépetl), México's highest peak and North America's highest volcano, was formed in three stages beginning during the mid-Pleistocene. Orizaba lies at the southern end of a volcanic chain extending north to Cofre de Perote volcano and towers up to 4400 m above its eastern base. Construction of the initial Torrecillas and Espolón de Oro volcanoes was contemporaneous with growth of Sierra Negra volcano on the SW flank and was followed by edifice collapses that produced voluminous debris avalanches and lahars. The modern Citlaltépetl volcano was constructed during the late Pleistocene and Holocene of viscous andesitic and dacitic lavas, forming the current steep-sided cone. Repetitive explosive eruptions beginning during the early Holocene accompanied lava dome growth and lava effusion. Historical eruptions have consisted of moderate explosive activity and the effusion of dacitic lava flows. The latest eruption of the volcano occurred during the 19th century.