Please register ( or log-in ) to create and edit pages

User Tools

    Please register ( or log-in ) to create and edit pages
  • Register

Site Tools


Main Menu

Main menu
[ Click categories to expand ]

Other categories

For tests only


Also see:

Content Guidelinesplugin-autotooltip__plain plugin-autotooltip_bigContent guidelines

Ideas for new topics are always welcomed, from experts and non-experts alike - if you're not sure if they'll be accepted by other editors, put them in the 'Proposed content' section for approval. The easiest way to create a new page is to use the

Registrationplugin-autotooltip__plain plugin-autotooltip_bigRegistration

At present, only registered users can create and edit articles. The registration process is very straightforward. Just click the 'Register' link at the top right of any page.

After you've registered, you'll be able to login with your password at any time…

How to edit pagesplugin-autotooltip__plain plugin-autotooltip_bigEditing pages

Once you're logged in, a grey floating 'Tool' menu at the right hand side of the screen enables access to all the main 'Content Pages' for editing. (Note: Some pages, such as the site info etc. are locked)

Like most Wikis, the site doesn't use

Importance Ratingsplugin-autotooltip__plain plugin-autotooltip_bigImportance ratings

In a departure from the usual Wiki format, Wikenigma assigns 'Importance Ratings' to some pages.

The idea is to separate articles which are considered (by the editors) to cover exceptionally important unknown issues from those which (although also u…

Faqplugin-autotooltip__plain plugin-autotooltip_bigFrequently Asked Questions

Q. Why the weird syntax? A. Like most Wikis, the site doesn't use HTML for formatting (security reasons etc). A guide to the special syntax can be found here. Unfortunately it can be quite confusing at first - but there's now a new 'Visual …

Newsplugin-autotooltip__plain plugin-autotooltip_bigNews

[ newest at the top ]

• Oct 2020 : A milestone of 500 unknown articles has been reached.

• Aug 2020 : Currently (beta) testing the new 'WYSIWYG' (What You See Is What You Get) page editor. It greatly simplifies the editing process, avoiding the need to learn th…

Contactsplugin-autotooltip__plain plugin-autotooltip_bigContacts

Use this form to send a message to Wikenigma . . . [ * note: all fields must be completed ]

Legalplugin-autotooltip__plain plugin-autotooltip_bigLegal

Content in general

Please note that in common with other publicly editable wikis, this website is not responsible for content posted by the public. Nevertheless, the ongoing editing process should be able to remove unsuitable content in a reasonable time. If you…


538 unknowns listed

Wikenigma supports:

plugin-autotooltip__plain plugin-autotooltip_bigDonate to Wikenigma . . .

The best way to donate is by adding new original content !

That can either be by contributing to an existing article, or by creating a new page with an as-yet-unlisted 'Known Unknown'.

Any registered user can create content.

A-Z listing
rss / xml feed
sitemap file

Wikenigma - an Encyclopaedia of Unknowns Wikenigma - an Encyclopaedia of the Unknown Science

Earthquake lights

'Earthquake Lights' [ EQL ] are airborne luminosities associated with seismic activity - reports of them go back more than 2000 years.

“With the beginning of seismology as a science in the 19th century, many scholars devoted time to reporting luminosities associated with earthquake activity. To name a few, the Irish engineer Robert Mallet, the “founder of seismology”, published a five part catalog entitled “On the Facts of Earthquake Phenomena” (Mallet, 1851, 1852, 1853, 1854, 1855), in which numerous reports on earthquake luminosities can be found. His catalog, first presented to the British Association of Science, covers the years 1606 B.C. to 1842 A.D.. Ignazio Galli, an Italian priest who graduated in Natural Sciences, published in the early 1900s a catalog of 148 seismic events associated with different types of luminosities. His catalog covers the years 89 B.C. to 1910 A.D. and focuses mainly, but not exclusively, on European events (Galli, 1910). Other early researchers on the subject of earthquake lights (EQL) include the work of Taramelli and Mercalli (1888), De Ballore (1913), Terada (1931), Musya (1932), and Montandon (1948).”

The lights are reported to appear while an earthquake is occurring, although there have been sightings of lights before or after earthquakes. The light shapes are described as similar to those of the auroras, with a white to bluish hue, but occasionally they have been reported having a wider colour spectrum. The luminosity is reported to be visible for several seconds, but has also been reported to last for tens of minutes.

There are many fully documented occurrences, including recent photo and video evidence.

The phenomenon has yet to be explained, although there are several theories regarding their origin. See, as an example Prevalence of Earthquake Lights Associated with Rift Environments in Seismological Research Letters, 2014, which postulates that “tectonic strain theory” (which itself is poorly defined) may be responsible.

“Our study has shown that the vast majority of EQL (i.e., 97%) have been observed in the following three tectonic environments: (1) intraplate rifts or grabens; (2) back‐arc or pull‐apart rifts or grabens (or paleorifts) located inland from subduction zones (orogenic settings); and (3) strike‐slip or transform faults, irrespective of the tectonic setting. The common characteristic of these three geological settings appears to be the presence of deeply penetrating subvertical faults, which exact role, passive or active, in phole propagation and EQL formation has yet to be resolved.”

Note: 'phole' as mentioned above means 'a lack of electron' or 'positive hole'.


Also see Hessdalen lightsplugin-autotooltip__plain plugin-autotooltip_bigHessdalen lights

The Hessdalen lights are unexplained airborne lights observed in the Hessdalen valley in rural central Norway. They first appeared in 1981, and at the peak of activity, there were around 20 reports each week. Currently, there are fewer events, but the …

Editor's Note : Much of the literature draws attention to the possible confusion between EQLs, which are an acknowledged geological phenomenon, and reports which claim they are UFOs.


    Share this page :


DOKUWIKI IMPLEMENTATION DESIGN BY UNIV.ORG.UK