El Hierro: 13 August–30 November 2013
The concluding entry on this page gathers observations from late 2013 and places seismic and volcanic monitoring notes within the longer sequence.
Read report 59 →
Volcano archive
In-depth volcano activity reports
Long-form records of the El Hierro volcanic episode, arranged as an historical series with calm summaries of seismicity, monitoring and changing conditions.
A continuous record, not a current warning
These reports document intervals from the El Hierro volcanic episode in the Canary Islands. The original sequence is preserved by report part, while summaries clarify its historical status and avoid treating old observations as present-day alerts.
El Hierro series
Archived activity reports
Archive review dates below fall within the current editorial cycle. Each linked article retains its historical reporting interval.
El Hierro: 27–30 March 2013
A focused archive entry covering a short interval of renewed attention to seismic behavior and official monitoring information.
Read report 57 →
El Hierro: 16–26 March 2013
This installment follows the developing earthquake sequence and the observational context available during the latter half of March.
Read report 56 →
El Hierro: 16 December 2012–16 March 2013
A multi-month record that tracks observations across a quieter interval and the transition toward increased seismic interest in March.
Read report 55 →
El Hierro: 1 October–15 December 2012
This report compiles monitoring developments during the final months of 2012, preserving the sequence without implying current unrest.
Read report 54 →
El Hierro: 12–30 September 2012
An archive of late-September observations, including the relationship between earthquake locations, depth estimates and broader monitoring.
Read report 53 →
El Hierro: 1–11 September 2012
This short-period record summarizes the signals and public monitoring context at the beginning of September 2012.
Read report 52 →
El Hierro: 1–31 August 2012
A month-long log of activity observations and seismic reports associated with the island’s extended monitoring period.
Read report 51 →
El Hierro: 7–31 August 2012
This installment continues the August record, organizing observations related to earthquakes and the island’s volcanic system.
Read report 50 →
El Hierro: 2–6 August 2012
A compact entry documenting the opening days of August and the developing interpretation of the recorded seismic sequence.
Read report 49 →How we work
Reading a volcano archive responsibly
Historical observations are useful when their date, uncertainty and original monitoring context remain visible.
Identify the interval
Start with the dates covered by the report rather than its later publication or review date.
Separate the signals
Earthquakes, ground deformation, gas measurements and visual observations provide different evidence.
Allow for revision
Locations, depths and interpretations may be refined as monitoring agencies process more information.
Confirm the present
Never use an archive entry as a current alert. Check official notices for present volcanic conditions.
Common questions
Volcano report FAQ
Are these current El Hierro alerts?
No. These are historical reports covering periods in 2012 and 2013. Consult official observatory and civil-protection notices for current conditions.
Why are there multiple numbered parts?
The original reporting was maintained as a continuing log. Each part covers a distinct period within the longer volcanic episode.
Does an earthquake swarm guarantee an eruption?
No. Seismicity is one monitoring signal and does not by itself establish that an eruption will occur.
Why can earthquake depths or locations differ?
Estimates depend on the available station data and analytical method. Values can be refined as additional information is processed.
What does deformation monitoring show?
It measures changes in the ground’s shape or position. Interpretation requires comparison with seismic, gas and other observations.
Can old reports predict future volcanic activity?
No. Archives help researchers and readers understand past behavior, but they do not provide an exact forecast of future events.
About this archive
Detailed context for volcanic change
Earthquake Report maintains long-form volcano records so readers can follow how observations and interpretations developed over time. The archive is informational and is not an emergency warning service.
Corrections, accessibility feedback and archive questions can be sent to info@earthquakereport.com-html.com.
Browse all volcano coverage →