Used and loved by millions
Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com
upon observing this
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "upon observing this" is correct and usable in written English.
It can be used to introduce a conclusion or insight that arises from careful observation of a situation or event. Example: "Upon observing this, I realized that the team's dynamics were affecting our overall productivity."
✓ Grammatically correct
Academia
News & Media
Science
Alternative expressions(4)
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Human-verified examples from authoritative sources
Exact Expressions
2 human-written examples
Domitius, upon observing this, sent messengers well acquainted with the country, encouraged by a promise of being amply rewarded, with dispatches to Pompey to Apulia, to beg and entreat him to come to his assistance.
The Romans upon observing this were not alarmed, but formed in a compact body, facing all their foes at once, and most of them laid down their shields and rested one p25 foot upon them, so that they might not slip so much; and thus they received the enemy's charge.
Academia
Human-verified similar examples from authoritative sources
Similar Expressions
58 human-written examples
This variation noted in oxygen surface groups is further confirmed upon observing the XPS results of O 1 s.
Science
Upon observing the sheen, ConocoPhillips took prompt action, promptly reporting the incident to Chinese authorities and activating response procedures," the statement said.
News & Media
He had an eye for patterns; upon observing the compound lenses of trilobite eyes, he became convinced he'd seen the pattern before.
Academia
Upon observing these phenomena, Michael asks his father two questions: 1.
News & Media
It started with an epiphany upon observing the acres of shanties -- rickety shelters built by informal settlers -- right across from my high school.
News & Media
But, upon observing the culture and behavior of our banking sector that misappropriates the public subsidy it receives by placing unreachable and unnecessary profit goals on top of obscene compensation requirements, it is abundantly clear that we need an alternative.
News & Media
Scott ordered Farenholt to flash her recognition signals and upon observing that Farenholt was close to his formation, he ordered the fire resumed at 23:51.
Wiki
The results demonstrate the necessity of this type of experiment, as our understanding of the reward association plasticity has to be reconsidered upon observing the results and incorporating them with existing work.
Science
This fact was even more significant upon observing that being the spouse correlates negatively both in global QoL and in the three dimensions other than social support.
Science
Expert writing Tips
Best practice
Use "upon observing this" to introduce a conclusion or action that directly results from a specific observation, ensuring a clear cause-and-effect relationship in your writing. Be mindful of the context; it's best suited for formal or neutral tones.
Common error
Avoid using "upon observing this" in casual or informal writing. Simpler alternatives like "after seeing this" or "when I saw this" are more appropriate for less formal settings. Using a formal expression in a casual context can come across as stilted or unnatural.
Source & Trust
83%
Authority and reliability
4.1/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "upon observing this" functions as a prepositional phrase introducing an adverbial clause of time or cause. It modifies the main clause by indicating when or why something occurred. As supported by Ludwig, it's usable in written English.
Frequent in
Academia
30%
News & Media
30%
Science
40%
Less common in
Formal & Business
0%
Encyclopedias
0%
Wiki
0%
Ludwig's WRAP-UP
In summary, the phrase "upon observing this" is a prepositional phrase that introduces an adverbial clause, indicating a direct cause-and-effect relationship between an observation and a subsequent action or realization. While grammatically correct and usable, as indicated by Ludwig, its frequency is rare, and it is best suited for neutral to formal contexts such as academic writing, news reports, or scientific papers. Simpler alternatives like "after noticing this" or "seeing this" may be more appropriate for informal settings. The source quality is generally high, and the phrase effectively links observation to conclusion. Using the right alternative of it is also key.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
after noticing this
Replaces "upon observing" with a simpler temporal conjunction, reducing formality.
on observing this
Uses a more concise preposition, maintaining a similar level of formality.
having observed this
Emphasizes the completed action of observing before the subsequent action.
seeing this
Offers a more direct and less formal alternative, focusing on the visual aspect.
witnessing this
Implies a more significant or impactful observation.
as a result of observing this
Explicitly states the cause-and-effect relationship, increasing emphasis.
due to observing this
Similar to "as a result of", but with a slightly more formal tone.
because of this observation
Breaks down the phrase into a more descriptive and explanatory form.
following this observation
Highlights the sequence of events after the observation, using a formal tone.
in light of this
Focuses on the new understanding gained from the observation.
FAQs
How can I rephrase "upon observing this" to sound less formal?
Consider using alternatives like "after noticing this", "seeing this", or "when I saw this" for a less formal tone. The choice depends on the specific context and the level of formality you aim to achieve.
Is there a difference between "upon observing this" and "after observing this"?
While both phrases indicate a sequence of events, "upon observing this" often implies a more immediate reaction or conclusion drawn directly from the observation. "After observing this" is a more general temporal marker. You can check out "after observing this" for alternative examples.
When is it appropriate to use "upon observing this" in academic writing?
"Upon observing this" is suitable for introducing findings or interpretations that stem directly from data or evidence. It effectively establishes a clear link between observation and conclusion in academic papers or reports.
What are some common synonyms for "upon observing this" that maintain a formal tone?
Synonyms such as "on observing this", "having observed this", or "as a result of observing this" can maintain a formal tone while offering variety in your writing. Each alternative slightly shifts the emphasis, so choose the one that best fits your intended meaning.
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Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Source & Trust
83%
Authority and reliability
4.1/5
Expert rating
Real-world application tested