Quake Watch 2015

a reply to: muzzy

I was kinda diggin the color code dots but i guess i can get used to the numbers. Looks good either way to me. Like always doing a great job its really comming along. To me you are right putting the link on top and not the bottom.

I just stumbled across the NetQuakes pages, these are the boxes that USGS installs in homes around certail areas of the USA.

What I noticed was that there is also a NetQuakes accelerometer installed in Nepal.

This is the page of recent seismograms for station KATNP_NQ_01

This is the map page for the NetQuakes instruments.

Just thought it may be of interest.

a reply to: PuterMan

An an addition: Whilst chasing down the manufactures of the GeoSIG boxes used for the netquakes network I came across this list of earthquakes in Switzerland.

www.seismo.ethz.ch...

a reply to: lurksoften
yeah I like the coloured icons too, it is what makes my maps unique.
If the Bing icons were blue instead of orange it might be a bit easier on the eyes.
I'll run both, with the NZ Topo (Google) as the primary visual map on the daily page. All it means is I will need to sort the events with highest magnitude at the top, easy to do. It doesn't effect the NZ Topo map in any way.



edit: Problem with Bing
Just loaded 13/7/2015 data to Bing.
It is only showing 165 events, when there are 167 on the file
Damn.
Still looking through it to see which ones are missing, they are sorted by highest magnitude at the top.
The last event on the list ;
Lat/Long: 39.053, 140.864UTC: 13/07/2015 20:57:11JST: 14/07/2015 05:57:11Depth: 8Mag: 1 MLLocation: SOUTHERN IWATE PREFEnergy Released: 0.000476879 tonnes of TNTSource: JMA Status: reviewed
is the last line on the file too.
12/7/2015 was OK, 150=150 events file/map
WTH?
Bing supposed to show 200 icons limit.

i did an Bing/ikimap for 13/7/2015 as well, coloured icons etc
that's the way to go, except the problem of iki going offline at times.

I have found the problem with Bing dropping events from the list and map.
If there are multiple events with the same Lat/Long and Magnitude only the first one shows on the list and map.
here is one of the missing ones, only the first one shows.
13/07/2015 10:32, 34.968, 135.369, 2.7, ML, KYOTO OSAKA BORDER REG
13/07/2015 11:04, 34.968, 135.369, 2.7, ML, KYOTO OSAKA BORDER REG

This may be caused by sorting by magnitude. I will try resorting by time and see what happens.

a reply to: PuterMan

This is the map page for the NetQuakes instruments.

Even USGS are using Bing now !!
says a lot about the mistake Google have made.

a reply to: muzzy
Na, changing to Time doesn't make any difference.
that 2nd M2.7 at 13/07/2015 11:04, 34.968, 135.369 still not showing.
www.bing.com...://dl.dropboxusercontent.com/u/1132313/Japan/2015/13072015JT.kmz
Not even showing on Google Earth, even if two icons are on top of each other the text tag should split apart when you hover over them, so must be its a fault with GPS Visualiser.

a reply to: muzzy

Hey muzzy!

I have a question for you about megathrusts and the pie charts you are creating. Maybe it is just me, but does it seem to show megathrusts (or rather 8+ EQs ) seem to occur within 3 to 10 years of each other? We had Japan's, India's and South America's within 10 years of each other, and now they say Cascadia is due to rupture any time. I am wondering if there is any evidence within your charts on timing of these quakes and past quakes like these?

Not sure if I am making clear what I am asking, but I'm hoping I am.

3.8 60km ESE of Lakeview, Oregon 2015-07-15 18:57:27 UTC-07:00 5.0 km
4.6 64km ESE of Lakeview, Oregon 2015-07-15 18:52:11 UTC-07:00 10.1 km
3.4 66km ESE of Lakeview, Oregon 2015-07-15 18:50:49 UTC-07:00 5.7 km
3.4 67km ESE of Lakeview, Oregon 2015-07-15 18:50:17 UTC-07:00 10.0 km
earthquake.usgs.gov...

a reply to: Darkblade71
I haven't really thought about analyzing the long term yet, there has certainly been a lot since 2004, but there were plenty of M8's throughout the 129 years I have done so far too. I have 199 M8's in the 1700 year period.
It would need to be 8.5+ to be a megaquake or great quake though.
here is the timeline showing years between each mega/thrust M8.5+. 36 of them in 502 years

YEAR - MAG - YEARS BETWEEN - LOCATION
1513 - 8.7 - Peru:Arequipa coast
1575 - 8.5 - 62 - Chile:Valdivia, Los Rios
1647 - 8.5 - 72 - Chile:Santiago
1668 - 8.5 - 21 - China:Linyi, Shandong
1700 - 9.0 - 32 - USA:Oregon/Washington(Cascadia subduction zone)
1707 - 8.6 - 7 - Japan: Wakayama coast, Honshu [Houei earthquake]
1716 - 8.8 - 9 - Peru:Torata, Arequipa
1716 - 8.6 - 0 - Peru: Pisco, Ica
1730 - 8.7 - 14 - Chile:Valparaiso
1746 - 8.6 - 16 - Peru:Lima coast
1751 - 8.5 - 5 - Chile:Chillan
1755 - 8.5 - 4 - Portugal/Spain/Morocco:[Lisbon EQ]
1822 - 8.5 - 67 - Chile:Valparaiso
1833 - 8.7 - 11 - Indonesia: Pagai coast, Sumatra
1835 - 8.5 - 2 - Chile:Concepcion
1855 - 8.5 - 20 - Switzerland:Haut-Valais
1868 - 8.8 - 13 - Chile/Peru:Arica coast
1897 - 8.7 - 29 - Philippines:Mindanao
1899 - 8.6 - 2 - USA:Alaska[Yakutat Bay EQ]
1906 - 8.8 - 7 - Equador: Manta coast
1917 - 8.5 - 11 - Samoa:Tonga Trench
1920 - 8.6 - 3 - China:Haiyuan
1922 - 8.7 - 2 - Chile: Vallenar, Atacama
1923 - 8.5 - 1 - Russia:Kamchatka coast
1950 - 8.6 - 27 - China:Zayu, Nyingchi (Tibet)
1952 - 9.0 - 2 - Russia:Kamchatka coast
1957 - 9.1 - 5 - USA: Andreanof Islands coast, Aleutians, Alaska
1960 - 9.5 - 3 - Chile:Araucanía
1963 - 8.6 - 3 - Russia: Kurile Is coast
1964 - 9.2 - 1 - USA: Prince William Sound, Alaska
1965 - 8.7 - 1 - USA:Rat Islands coast, Alaska
2004 - 9.1 - 39 - Indonesia:Simeulue coast, Sumatra[Sumatra earthquake]
2005 - 8.7 - 1 - Indonesia:Bangkaru Is coast, Nias
2010 - 8.8 - 5 - Chile:Constitucion coast, Maule
2011 - 9.0 - 1 - Japan:Sendai coast, Honshu[Tohoku earthquake]
2012 - 8.7 - 1 - Off W Coast of Northern Sumatra

a reply to: muzzy
Thank you,
something for me to stare at for a little while.

M6.4 - 116km NE of Bathsheba, Barbados

13.829°N 58.641°W depth=5.6 km (3.5 mi)

Time
2015-07-16 15:16:31 (UTC)
2015-07-16 10:16:31 (UTC-05:00) in your timezone
Times in other timezones

Nearby Cities
116km (72mi) NE of Bathsheba, Barbados
132km (82mi) NE of Bridgetown, Barbados
252km (157mi) E of Bisee, Saint Lucia
254km (158mi) ESE of Riviere-Pilote, Martinique
256km (159mi) E of Castries, Saint Lucia

USGS

6.4 EMSC

a reply to: lurksoften
not much info out yet from the other networks, GSRAS stiil hasn't even listed it (@7:41amNZST)
6.5 Mw [geofon], 6.5 Mw [gcmt], 6.4 Mo [neic pde]

I been so busy in the 1880's lately, I forgot this year!
just added # 28 and #29 M6.5+'s
www.bing.com...://dl.dropboxusercontent.com/u/1132313/World7%2B/2015C.kmz
didn't increase the KT energy by much, just an extra 254KT

a reply to: Darkblade71

no problem,
do you want the whole 1700 years worth of M8's to look at?

here it is on Dropbox as a Notepad file, same style as the list yesterday
dl.dropboxusercontent.com...

a reply to: muzzy

Not unless you want to throw them out there.
I think I have seen what I was wondering about.

They almost seem to run in groups of 3-4 and then 7 Every century.

If what I am seeing is right, that means 2 more Mega quakes in the next 5 to 10 years,as they seem to run in 20 year groups
and then a lull, but that could just be my own weird way of connecting patterns that are not there...lol

But it just seems like there is a pattern there of some kind

5.2 MINDANAO, PHILIPPINES

From 33 minutes ago

I just found another Great Quake?
Szeliga et al., 2010
Szeliga W., Hough S., Martin S., Bilham R., 2010. Intensity, Magnitude, Location, and Attenuation in India for Felt Earthquakes since 1762. Bulletin of the Seismological Society of America, 100, 2, 570-584 + electronic supplement, doi:10.1785/0120080329 ©
Nicobar Islands
31 December 1881
lat, lon 7.170, 89.600
depth
15 km
9.3 Mw
www.emidius.eu...

I'm not sure about the accuracy of that though
Bilham and Ortiz only give it a 7.9Mw, as does NOAA



I can see where UTSU was coming from now, often he would put a note beside some magnitudes that were a bit suspect.

Trying to understand how Szeliga et al. got 9.3Mw.
Here is the full text from NOAA about the quake and the tsunami;
I have highlighted in red several sentences that may make one lean towards higher than 7.9Mw
However the first sentence about the length of the fault, which measures approx 480km, doesn't fit with a M9+, they have in the past been 1000-2000km ruptures.

"1881 12 31 INDIA: ANDAMAN I,NICOBAR I
" Estimated Rupture Parameters of the 31 December 1881 (M 7.9) Car Nicobar Earthquake. Southern segment (main rupture) 8.52 N, 92.43 E. Northern segment 10.75 N, 92.43 E. (reference #4104) December 31, 1881, morning 7:55 hr. Burmese coast. An earthquake, which is believed to have originated in the Bay of Bengal, west of the Andaman Islands, was felt over a area of 2 million square miles. Besides affecting a large portion of the Indian Peninsula and Bengal, it was also felt on the Burmese coast, including some of the islands in the Mergui Archipelago and caused much damage in the Adaman and Nicobar Islands. The surface of the ocean was greatly disturbed and waves were formed which continued to roll against the coastlines for several hours after the cessation of the earth waves, which lasted only for a few seconds.. Port Blair is the only place where any damage was done to masonry buildings, and it is to be regretted that the damage should be so little instructive, as is the case... In the Car Nicobar extensive damage was done to the coconut groves and huts of the natives and vents similar to those described in connection with the Cachar earthquake of 1869 were opened in the sandy soil. (reference #1185)
The 31 December 1881 Mw = 7.9 Car Nicobar earthquake. This earthquake caused minor damage in the Andaman Island Penal colony and generated a tsunami that was observed throughout the Bay of Bengal but not along the Burmese coast. The tsunami did no damage around the Bay of Bengal where tide gauges recorded a maximum amplitude of 0.8 m (Oldham, 1884). An analysis of five tide gauge records reveals that the earthquake was Mw = 7.9 +0.2 and occurred on an east-dipping thrust fault below and to the west of Car Nicobar, an island at 9 deg N midway between the Andaman and Nicobar islands (Ortiz and Bilham, 2003). GPS measurements at Port Blair indicate oblique convergence of the plate boundary (Paul et al., 2001). The earthquake is believed to have occurred on the interface between the Indian and Andaman Plates and the inferred mechanism of westward slip of the hanging wall slip is consistent with slip partitioning between the dipping subduction zone, and the strike-slip west Andaman fault east of Car Nicobar. A feature of this earthquake is the inferred presence of a region of minor slip NE of the main rupture zone. This may have been a secondary secondary earthquake triggered by the mainshock. Its timing would have to have occurred within a few minutes of the mainshock for it to have produced the sea wave observed at Port Blair. Local populations were concentrated in only two islands and therefore there is no corroboration of this inferred northern region of submarine faulting which occurred between them. It is probable that offshore corals may be of use in reconstructing an extended history of earthquakes in the Andaman-Nicobar Islands. The island of Car Nicobar is believed to have been raised and tilted during the 1881 event. Deformation models that do not include this uplift result in an inappropriate estimate of the observed tsunami runup on the island (Ortiz and Bilham, 2003). (above from reference #4084)
Epicentre in Bay of Bengal; waves recorded in Ceylon and Gangetic Delta in Bengal. (reference #3927) December 31, 1881. Epicenter in western central part of the Bay of Bengal. Tsunami waves from Sri Lanka to Ganges delta. Tsunami on Andaman and Nicolar Islands. Tsunami amplitudes: Port Blair 0.92 m, False Point 0.05 m, Nagapatam 1.22 m, Camicobar 0.7 m. (reference #96)
December 31, 1881. Bay of Bengal. Epicenter supposedly near the center of the Bay. Waves were reported from Ceylon northward along the east shore of the bay to the Ganges Delta and along the Andaman and Nicobar islands as far south as Sumatra. Four waves were noted at some locals. No waves were recorded at the tide stations on the Burma coast. (reference #42) The surface of the ocean was greatly disturbed and waves were formed which continued to roll against the coastlines for several hours after the cessation of the earth waves, which lasted only for a few seconds. The first tidal wave (tsunami) was recorded at Port Blair at 8:10 a.m. followed by others in succession at about 15 min interval, with a height of about 3 ft from crest to hollow. They continued til 9 p.m. The velocity of the waves varied from 2 to 6.9 miles per minute. ... The sea-wave broke on this island [Car Nicobar] and it is recorded that the water penetrated into the houses of the Burmese residents which stood on platforms of less than 2.5 ft high, while those on higher platforms escaped. (reference #1185)

4.8 MINDANAO, PHILIPPINES

18 minutes ago.

Magnitude mb 5.7
Region FIJI REGION
Date time 2015-07-17 18:49:53.9 UTC
Location 18.12 S ; 178.16 W
Depth 544 km
Distances 360 km E of Suva, Fiji / pop: 77,366 / local time: 06:49:53.9 2015-07-18
322 km SE of Lambasa, Fiji / pop: 24,187 / local time: 06:49:53.9 2015-07-18

EMSC

5.7 USGS

I'm having extreme queasiness and bad headache today, don't know why but it made me think of earthquakes.

I found and watched these videos and I thought the guy did a really good job explaining things.

I like his Global Earthquake map and the way he shows the quakes dispersed worldwide.

leolady

That GHEA (Global Historical Earthquake Archive) has been really helpful in the pre 1900 part of the 6.5+ project.
But I just found another helpful source of Historic European Quakes
www.emidius.eu... 1000-1899 and 1900-2006
I downloaded the Excel file, but you can use the interactive list and map too
www.emidius.eu...
From what I can see initially its mostly work by Oncescu et al., 1999 and Papazachos & Papazachou., 2003 and Soysal et al., 1981 that have produced another 227 earthquakes covering Greece Turkey and the Balkans, and one in Iceland
many didn't show on the GHEA data
I already had some in my lists , but get a new extra magnitude and source to add in

AAAAaaaaaaaaaaargh
After doing 2 decades, 1880-1900 I now have to go back and redo most of them
for example, what I have to do, just for the 1890's
1899 reload GPS file, added column
1898 redo whole file new line and added Mag column
1897 redo whole file new line Turkey
1896 redo whole file 2 new lines Iceland, Romania
1895 redo whole file new line Turkey
1894 redo whole file 2 new lines Turkey, Romania, 3 added Mag columns
1893 redo whole file new line Romania and 2 added Mag columns
By "redo" I mean add the lines or column entries, create the GPS KMZ file, create a new pie, create a new map and change the text on the page.
I better do it now, before I start on the 1870's.
I don't think the Fat Lady will ever sing on this project, it seems never ending.
The slowest part is finding damage comments for each quake, NOAA has some, but it has to be edited down to just a few lines to fit the tags.

link for those not logged in and can't see the link in my signature
significantearthquakes.blogspot.co.nz...