Did Quark Matter Penetrate Earth in 1993?

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Discussion Overview

The discussion revolves around the events recorded in 1993 that suggest the possible passage of quark matter through the Earth. Participants explore the implications of these events, the lack of follow-up research, and the nature of quark matter itself. The conversation touches on theoretical interpretations, alternative explanations, and the potential consequences of quark matter interacting with Earth.

Discussion Character

  • Exploratory
  • Debate/contested
  • Technical explanation

Main Points Raised

  • Some participants note that two events were recorded in 1993, suggesting something entered and exited the Earth, but there has been no follow-up research since then.
  • Others express curiosity about whether these events could be classified as anomalies or flukes, with one participant suggesting the lack of further investigation indicates a lack of significance.
  • Questions about the nature of quark matter are raised, with one participant referencing a Wikipedia article for clarification.
  • A participant cites an alternative explanation from Anderson et al. (2003), proposing that the seismic data could be interpreted as an earthquake rather than the passage of quark matter.
  • There is speculation about the density and effects of quark matter if it were to strike the Earth, with concerns about the lack of detailed descriptions from the monitoring stations regarding the events.

Areas of Agreement / Disagreement

Participants express uncertainty regarding the significance of the recorded events and whether they represent anomalies or flukes. There is no consensus on the interpretation of the seismic data or the nature of quark matter.

Contextual Notes

Limitations include the cessation of research by the US Geological Survey on unassociated events, which may affect the understanding of the recorded phenomena. The discussion also reflects a reliance on interpretations that may vary significantly among participants.

g33kski11z
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Article - http://news.bbc.co.uk/2/hi/science/nature/2502755.stm I wasn't real sure where to post this (mods move if necessary)

The first event was recorded at seven monitoring stations in India, Australia, Bolivia and Turkey, and the second event was recorded at nine monitoring stations in Australia and Bolivia.

First event occurred on 22 October 1993, when, according to the researchers, something entered the Earth off Antarctica and left it south of India 0.73 of a second later.

The second occurred on 24 November 1993, when an object entered south of Australia and exited the Earth near Antarctica 0.15 of a second later.

Has anything come of this? Is it even relevant/accurate? The BBC doesn't seem to have a follow-up story or anything.
 
Earth sciences news on Phys.org
Nothing..??
 
g33kski11z said:
Nothing..??
According to the article you posted, they stopped researching it back in 1993.

Unfortunately, scientists may not be able to find any more events that suggest the passage of strange quark matter through the Earth.

In 1993 the US Geological Survey stopped collecting data from "unassociated events."
 
g33kski11z said:
I understand that. I was just curious if anything was ever made of it, any follow up or anything like that..

so, would this be an anomaly? https://www.physicsforums.com/showthread.php?t=58374 .. or more of a fluke?

Well they stopped researching it, so no, I'd say nothing came of it.

Anomaly? No. Fluke? No. The fact they took it no further seems to indicate there was nothing exciting enough about it to warrant further investigation.
 
what is quark matter?
 
"We can't prove that this was strange quark matter, but that is the only explanation that has been offered so far," Herrin says.

Ah 'twould that good science were so easy...
 
A little digging reveals an alternative explanation...

Anderson et al. (2003) interpret a set of unassociated seismic arrivals observed on 24 November 1993 as a line source, which they claim is consistent with the passage of a "strange quark nugget" through the Earth. In fact, these arrivals can be convincingly interpreted as an earthquake source on the Pacific-Antarctic ridge.

http://www.bssaonline.org/cgi/content/extract/94/6/2414
 
  • #10
What would quark matter do if it struck the Earth? And am I right in saying that a stable "nugget" would have to be incredibly dense (on the order of mountain sized masses per cubic centimetre?
 
  • #11
ryan_m_b said:
What would quark matter do if it struck the Earth? And am I right in saying that a stable "nugget" would have to be incredibly dense (on the order of mountain sized masses per cubic centimetre?

Yes, I wish the 'reporting stations' had been more detailed in their description of the 'event'. Just to say it happened leaves one a tad mystified. Did it take out someone's garbage shed? Activate some kind of monitor? Was it obvious without equipment?
 

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