Class B First-hand BFRO #48575

Fisherman on Lake Arthur startled by series of possible wood knocks and rock clacks

1 May 2015 10-1030 am Prospect, Butler County, Pennsylvania 1 witness

Account

While fishing alone from a boat on Lake Arthur in the morning, the witness heard repeated wood knocks from the shoreline followed by rock clacking sounds from farther west. The alternating sequence continued for about 8-10 minutes until a passing boat caused the sounds to stop. Disturbed by the experience, the witness started the boat and moved to another part of the lake.

Summary drafted by AI from the source report and checked by code before I publish it. The witness's own words remain with the publisher — read the original report .

What was reported

Every kind of observation in the account. Select one to find other encounters with it.

Facts & provenance

Each value names where it came from.

Date
1 May 2015
Stated BFRO report #48575 · BFRO report, labelled fields: Year, Month, Date
Time of day
10-1030 am
Stated BFRO report #48575 · BFRO report, “Time And Conditions” section
Place
Prospect, Butler County, Pennsylvania
Stated BFRO report #48575 · BFRO report, labelled fields: State, County, Nearest Town, Location Details, Nearest Road
Map point
40.95, -80.07 (± 1000 m)
Stated BFRO map layer · BFRO published map layer · read with 85% confidence
BFRO map layer point for report 48575 with published boundary
Account type
First-hand
Derived BFRO report #48575 · BFRO report, “Observed” section
Witnesses
1
Stated BFRO report #48575 · BFRO report, “Other Witnesses” section
Witness was
fishing from a boat on a lake
Stated BFRO report #48575 · BFRO report, “Observed” section
Source classification
Class B
Stated BFRO report #48575 · BFRO classification label

Evidence & investigation

What the source says was found or done. Claimed evidence is listed as claimed; the Anomadex has not examined it.

Investigated by
Tom F (BFRO)
Follow-up

An investigator spoke with the witness by phone to review the reported sounds and setting.

BFRO report, “Follow-Up” section

Source timeline

Every record this entry is built from, earliest known first. Records are versioned and never edited in place.

  1. Published 2015-05-01 Retrieved 2026-09-25 Version 1 Hash 30ce7ad3619a
    BFRO - Bigfoot Field Researchers Organization
  2. BFRO map layer Reference
    Retrieved 2026-09-24 Version 1 Hash cfb8a3d423b7
    BFRO - Bigfoot Field Researchers Organization