Campus Alert Archive
Caltech

Pasadena police will consult on an unconfirmed threat called in this morning

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Campus Security said the Pasadena Police Department would come to campus to consult on an unconfirmed threat called in that morning, and that campus operations remained as scheduled.

Alerts
1
Response
—
Killed
—
Injured
—
Institution
California Institute of Technology
Private R1 · CA
All Caltech cases →
~2,400 studentsEverbridgeCaltech Emergency Notification
Documented Timeline

Alert Sequence

1 message in sequence · 1 verified verbatim

Confirmed wording is transcribed character-for-character from a primary source. Use Verify this quote under each message to open that source in a new tab and compare the text yourself.

INITIAL ALERTWebsite
Verified verbatim474 chars
Original Notification: 10:25 a.m. The Pasadena Police Department will be responding to campus today to consult on and evaluate a new unconfirmed threat that was called into Caltech Security this morning. Law enforcement's presence on campus is preventative and precautionary. Campus operations remain undisrupted and as scheduled. If you notice anything unusual, please contact Caltech Security at 626-395-5000. We will share updates as more information becomes available.
Verify this quote
Caltech Security announcement, original notificationsecurity.caltech.edufind archived copies
Two independent reads matched sha256 70835a7a5dc2b559929d56f46bd65cd815f0382cc01d58d0980d6efb235754fd.
The 11:15 a.m. update on the same page differed between reads and is not in this file.
Message elements

How the first alert is built

To check this alert, SuperGrok Heavy 4.5 (an AI) read it in full 25 separate times, independently. Each read decided whether the message answers each of the six questions and gave a short reason. A final reviewer then weighed all 25 and wrote the plain-English verdict you see when you open a row. The score (for example 22/25) is how many reads agreed; the 25 individual reads are tucked underneath if you want to check them.

Original Notification: 10:25 a.m. The Pasadena Police Department will be responding to campus today to consult on and evaluate a new unconfirmed threat that was called into Caltech Security this morning. Law enforcement's presence on campus is preventative and precautionary. Campus operations remain undisrupted and as scheduled. If you notice anything unusual, please contact Caltech Security at 626-395-5000. We will share updates as more information becomes available.

  • Sourcepresent25/25

    Final assessment

    Source is present on 25 of 25 passes.

    Who is sending the alert and who is responding. People act faster on a message from a clearly identifiable, credible sender, such as a named department, the police, or a branded alert system, than on an anonymous notice. A branded signature counts.

    See all 25 individual reads
    1. present: After: Source is present.
    2. present: Because: Source is present.
    3. present: Reading: Source is present.
    4. present: Here: Source is present.
    5. present: The: Source is present.
    6. present: Quoted: Source is present.
    7. present: Seeing: Source is present.
    8. present: Checking: Source is present.
    9. present: Noting: Source is present.
    10. present: From: Source is present.
    11. present: Inside: Source is present.
    12. present: Upon: Source is present.
    13. present: Given: Source is present.
    14. present: Where: Source is present.
    15. present: Since: Source is present.
    16. present: Looking: Source is present.
    17. present: Finding: Source is present.
    18. present: Judging: Source is present.
    19. present: Against: Source is present.
    20. present: Within: Source is present.
    21. present: Across: Source is present.
    22. present: Under: Source is present.
    23. present: Following: Source is present.
    24. present: Considering: Source is present.
    25. present: Scanning: Source is present.
  • Hazardabsent0/25

    Final assessment

    Hazard is absent on 0 of 25 passes.

    What the threat actually is. A complete warning names the specific danger, such as a shooter, a fire, a tornado, or a gas leak, rather than a vague emergency, because people decide what to do based on what they are facing.

    See all 25 individual reads
    1. absent: After: Hazard is absent.
    2. absent: Because: Hazard is absent.
    3. absent: Reading: Hazard is absent.
    4. absent: Here: Hazard is absent.
    5. absent: The: Hazard is absent.
    6. absent: Quoted: Hazard is absent.
    7. absent: Seeing: Hazard is absent.
    8. absent: Checking: Hazard is absent.
    9. absent: Noting: Hazard is absent.
    10. absent: From: Hazard is absent.
    11. absent: Inside: Hazard is absent.
    12. absent: Upon: Hazard is absent.
    13. absent: Given: Hazard is absent.
    14. absent: Where: Hazard is absent.
    15. absent: Since: Hazard is absent.
    16. absent: Looking: Hazard is absent.
    17. absent: Finding: Hazard is absent.
    18. absent: Judging: Hazard is absent.
    19. absent: Against: Hazard is absent.
    20. absent: Within: Hazard is absent.
    21. absent: Across: Hazard is absent.
    22. absent: Under: Hazard is absent.
    23. absent: Following: Hazard is absent.
    24. absent: Considering: Hazard is absent.
    25. absent: Scanning: Hazard is absent.
  • Locationpresent25/25

    Final assessment

    Location is present on 25 of 25 passes.

    Where the threat is. Saying whether danger is in a specific building, a part of campus, or area-wide lets people judge their own proximity and choose a safe direction. Without a where, a warning is hard to act on precisely.

    See all 25 individual reads
    1. present: After: Location is present.
    2. present: Because: Location is present.
    3. present: Reading: Location is present.
    4. present: Here: Location is present.
    5. present: The: Location is present.
    6. present: Quoted: Location is present.
    7. present: Seeing: Location is present.
    8. present: Checking: Location is present.
    9. present: Noting: Location is present.
    10. present: From: Location is present.
    11. present: Inside: Location is present.
    12. present: Upon: Location is present.
    13. present: Given: Location is present.
    14. present: Where: Location is present.
    15. present: Since: Location is present.
    16. present: Looking: Location is present.
    17. present: Finding: Location is present.
    18. present: Judging: Location is present.
    19. present: Against: Location is present.
    20. present: Within: Location is present.
    21. present: Across: Location is present.
    22. present: Under: Location is present.
    23. present: Following: Location is present.
    24. present: Considering: Location is present.
    25. present: Scanning: Location is present.
  • Guidancepresent23/25

    Final assessment

    Guidance is present on 23 of 25 passes.

    The protective action to take. A clear, specific instruction, such as shelter in place, evacuate, avoid the area, or run-hide-fight, drives faster and more correct protective behavior than describing the threat alone.

    See all 25 individual reads
    1. present: After: Guidance is present.
    2. present: Because: Guidance is present.
    3. present: Reading: Guidance is present.
    4. present: Here: Guidance is present.
    5. present: The: Guidance is present.
    6. present: Quoted: Guidance is present.
    7. present: Seeing: Guidance is present.
    8. present: Checking: Guidance is present.
    9. present: Noting: Guidance is present.
    10. present: From: Guidance is present.
    11. absent: Inside: Guidance is absent.
    12. present: Upon: Guidance is present.
    13. present: Given: Guidance is present.
    14. present: Where: Guidance is present.
    15. present: Since: Guidance is present.
    16. present: Looking: Guidance is present.
    17. present: Finding: Guidance is present.
    18. present: Judging: Guidance is present.
    19. present: Against: Guidance is present.
    20. present: Within: Guidance is present.
    21. present: Across: Guidance is present.
    22. present: Under: Guidance is present.
    23. present: Following: Guidance is present.
    24. present: Considering: Guidance is present.
    25. absent: Scanning: Guidance is absent.
  • Timepresent25/25

    Final assessment

    Time is present on 25 of 25 passes.

    When the message applies. A timestamp, the word now or immediately, or a phrase like until further notice tells the reader whether the danger is current and how quickly to act.

    See all 25 individual reads
    1. present: After: Time is present.
    2. present: Because: Time is present.
    3. present: Reading: Time is present.
    4. present: Here: Time is present.
    5. present: The: Time is present.
    6. present: Quoted: Time is present.
    7. present: Seeing: Time is present.
    8. present: Checking: Time is present.
    9. present: Noting: Time is present.
    10. present: From: Time is present.
    11. present: Inside: Time is present.
    12. present: Upon: Time is present.
    13. present: Given: Time is present.
    14. present: Where: Time is present.
    15. present: Since: Time is present.
    16. present: Looking: Time is present.
    17. present: Finding: Time is present.
    18. present: Judging: Time is present.
    19. present: Against: Time is present.
    20. present: Within: Time is present.
    21. present: Across: Time is present.
    22. present: Under: Time is present.
    23. present: Following: Time is present.
    24. present: Considering: Time is present.
    25. present: Scanning: Time is present.
  • Impactabsent0/25

    Final assessment

    Impact is absent on 0 of 25 passes.

    What the hazard could do to the people in its path. Beyond naming the threat, a complete warning conveys its potential consequences or severity, such as that a tornado can level buildings or that a leak could be explosive, so recipients grasp how much danger they are in. Research on warning message content finds that a concrete impact statement helps people personalize their risk and act sooner.

    See all 25 individual reads
    1. absent: After: Impact is absent.
    2. absent: Because: Impact is absent.
    3. absent: Reading: Impact is absent.
    4. absent: Here: Impact is absent.
    5. absent: The: Impact is absent.
    6. absent: Quoted: Impact is absent.
    7. absent: Seeing: Impact is absent.
    8. absent: Checking: Impact is absent.
    9. absent: Noting: Impact is absent.
    10. absent: From: Impact is absent.
    11. absent: Inside: Impact is absent.
    12. absent: Upon: Impact is absent.
    13. absent: Given: Impact is absent.
    14. absent: Where: Impact is absent.
    15. absent: Since: Impact is absent.
    16. absent: Looking: Impact is absent.
    17. absent: Finding: Impact is absent.
    18. absent: Judging: Impact is absent.
    19. absent: Against: Impact is absent.
    20. absent: Within: Impact is absent.
    21. absent: Across: Impact is absent.
    22. absent: Under: Impact is absent.
    23. absent: Following: Impact is absent.
    24. absent: Considering: Impact is absent.
    25. absent: Scanning: Impact is absent.

Coded by SuperGrok Heavy 4.5

Systematic AI judgments with visible reasoning, not human-validated codings.

About this analysis
Context

Background

The live announcement page also carries an 11:15 a.m. update saying the evaluation found no danger. That update did not match a second read and is not confirmed here.
Analysis

Key Findings

The confirmed text is the 10:25 a.m. original notice. Operations were described as undisrupted.
Outcome
The confirmed notice said operations remained undisrupted and that updates would follow.
Provenance

Sources

Every claim on this page is meant to be checkable. Open the links below (and the Verify this quote control under each confirmed alert) to read the original university, news, or archive page yourself. Hostnames are shown so you can see where you are going; archived copies survive when live pages move or disappear. See also our methodology.

  1. Official
    Caltech Security announcement 80338
    security.caltech.edu
    archived copy
Cite this case

Campus Alert Archive. "California Institute of Technology: Pasadena police will consult on an unconfirmed threat called in this morning." Incident of July 17, 2026. Added October 2026. https://campusalertarchive.com/case/caltech-unconfirmed-threat-consult-2026-07-17/

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Alert text quoted on this page remains the work of the issuing institution; the archive is a secondary source.

Tags
2026threatprivate-r1
Added October 2026Updated October 2026Via ingestion