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Sismo leggero mag. 4.0 - 59 km a sud ovest da Homer, Borough della Penisola di Kenai, Alaska, Stati Uniti, martedì, 16 ago 2022 14:06 (GMT -8) -

Sismo leggero mag. 4.0 - 59 km a sud ovest da Homer, Borough della Penisola di Kenai, Alaska, Stati Uniti, martedì, 16 ago 2022 14:06 (GMT -8) Sismo leggero mag. 4.0 - 59 km a sud ovest da Homer, Borough della Penisola di Kenai, Alaska, Stati Uniti, martedì, 16 ago 2022 14:06 (GMT -8)

Sismo leggero magnitudine 4.0 a 72 km di profondità

16 Aug 22:08 UTC: Primo a segnalare: EMSC dopo 2 minuti.
16 Aug 22:08: Ora utilizzando nuova fonte di dati: USGS
16 Aug 22:13: Profondità ricalcolata da 88.0 a 72.0 km (da 55 a 45 mi). Posizione dell'epicentro corretta di 1.9 km (1.2 mi) al NNW.
Update Tue, 16 Aug 2022, 22:12

Moderate magnitude 4.0 earthquake 37 miles southwest of Homer, Alaska, United States

4.0 quake 16 Aug 2:06 pm (GMT -8)
4.0 quake 16 Aug 2:06 pm (GMT -8)
A magnitude 4.0 earthquake near Homer, Kenai Peninsula, Alaska, USA, was reported only 6 minutes ago by the United States Geological Survey, considered the key international and national agency that monitors seismic activity in the US. The earthquake occurred at an intermediate depth of 55 miles beneath the epicenter early afternoon on Tuesday, August 16th, 2022, at 2:06 pm local time. The exact magnitude, epicenter, and depth of the quake might be revised within the next few hours or minutes as seismologists review data and refine their calculations, or as other agencies issue their report.
Our monitoring service identified a second report from the European-Mediterranean Seismological Centre (EMSC) which listed the quake at magnitude 4.0 as well.
Towns or cities near the epicenter where the quake might have been felt as very weak shaking include English Bay (pop. 250) located 13 miles from the epicenter, Port Graham (pop. 180) 15 miles away, and Seldovia (pop. 280) 23 miles away. In Homer (pop. 5,500, 37 miles away), Diamond Ridge (pop. 1,200, 39 miles away), Anchor Point (pop. 1,900, 41 miles away), and Fritz Creek (pop. 1,900, 48 miles away), the quake was probably not felt.

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Dettagli del sismo

Data e ora16 Aug 2022 22:06:09 UTC -
Ora locale all'epicentromartedì, 16 ago 2022 14:06 (GMT -8)
StatusConfermato
Magnitudine4
Prof.72.0 km
Epicentro latitudine / longitudine59.2126°N / 152.1586°W (Gulf of Alaska, Alaska, Stati Uniti)
Antipode59.213°S / 27.841°E
Intensità di scuotimentoScuotimento molto debole
Sentito4 rapporti
Fonte dati primariaUSGS (United States Geological Survey)
Vulcano più vicinoAugustine (74 km / 46 mi)
Luoghi vicini21 km SO da English Bay (pop: 254) | Mappa | Sismi nelle vicinanze
36 km SO da Seldovia (pop: 277) | Mappa | Sismi nelle vicinanze
59 km SO da Homer (pop: 5,520) | Mappa | Sismi nelle vicinanze
65 km SSO da Anchor Point (pop: 1,930) | Mappa | Sismi nelle vicinanze
76 km SO da Fritz Creek (pop: 1,930) | Mappa | Sismi nelle vicinanze
256 km SSO da Alaska City (pop: 298,700) | Mappa | Sismi nelle vicinanze
275 km SSO da Eagle River (pop: 24,800) | Mappa | Sismi nelle vicinanze
275 km SSO da Eagle River (Anchorage) (pop: 24,800) | Mappa | Sismi nelle vicinanze
Meteo all'epicentro al momento del sismoLight Rain 13°C (55 F), humidity: 96%, wind: 8 m/s (16 kts) from NNE
Energia sismica rilasciata stimata6.3 x 1010 joules (17.5 MWh, equivalent to 15.1 tons of TNT) | about seismic energy
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Data for the same earthquake reported by different agencies

Info: The more agencies report about the same quake and post similar data, the more confidence you can have in the data. It takes normally up to a few hours until earthquake parameters are calculated with near-optimum precision.
Mag.Prof.UbicazioneFonte
4.072 km20 Km SW of Nanwalek, AlaskaUSGS
4.079 kmSOUTHERN ALASKAEMSC
4.072 kmSouthern AlaskaRaspberryShake

Seismograms

Seismic station: Kodiak Island, Alaska, USA (KDAK/II network) | Distance from quake: 161 km / 100 mi | Show on map | Station Info
Seismic station Kodiak Island, Alaska, USA: vertical movement plot around time of quake (source: IRIS/BUD)
Seismogram (vertical component) around time of quake. Thin dotted red line indicates time of quake. Seismic waves arrive some time later, depending on distance. Source: IRIS Buffer of Uniform Data (BUD) webtool
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User reports for this quake (4)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
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Homer, AK / Weak shaking (MMI III) / rattling, vibrating / 2-5 s : The east side of my house was shaking and causing glass to rattle. Nothing broke or fell of the wall. To me it felt like an aftershock. | One user found this interesting.  
seward (188.7 km NE of epicenter) [Map] / Very weak shaking (MMI II) / rattling, vibrating / 1-2 s : Light shaking | One user found this interesting.  
Homer (76.7 km NNE of epicenter) [Map] / Very weak shaking (MMI II) / single lateral shake / 1-2 s : Short duration slight shake. Heard the windows rattle.  
Vicki Ln, Anchor Point, AK 99556 (66.3 km NNE of epicenter) [Map] / Moderate shaking (MMI V)

Earlier earthquakes in the same area

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