soc_lj_snapshots — LiveJournal friendships and communities over time (2006)

Description

Snapshots of the friendship network of users of LiveJournal, an online community where members maintain journals and blogs, declare which other members are their friends, and join and watch communities (group blogs), collected by L. Backstrom and collaborators by crawling LiveJournal and distributed by the Stanford Network Analysis Project (SNAP). The data consist of 12 consecutive snapshots of the friendship network, and 8 snapshots (the 5th to the 12th) of the memberships of users in communities and of the users watching communities. The dates of the snapshots are not documented; they are numbered in their order, as given. The user identifiers are anonymized; they appear to be the same in all snapshots and in the community networks (96% of the users of the first friendship snapshot appear in the last one, and 98% of the community members of the 12th snapshot in the friendship network of the same snapshot), although this is not documented.

There are three kinds of networks:

friends_<n> (for $n$ from 01 to 12): directed networks of users, where an edge $i \to j$ means that user $i$ declared user $j$ as a friend.
members_<n> (for $n$ from 05 to 12): bipartite networks of users and communities, where an edge means that the user is a member of the community.
watchers_<n> (for $n$ from 05 to 12): bipartite networks of users and communities, where an edge means that the user watches the community.

The file of the 8th friendship snapshot contains a corrupted region of 80,526 lines (lines 39,765,096 to 39,845,621, of which 17,103 are malformed and others contain impossible identifiers); these lines are left out of friends_08.

These networks are related to the entry livejournal (the friendship network of the crawl of the same study, with 4.8 million users), whose relation to the snapshots is not documented.

The networks have the following properties:

(Node) user_id: the anonymized identifier of the user; in the community networks, community_id, the identifier of the community (-1 for users, and user_id is -1 for communities), and is_community, whether the node is a community.

Tags

Social Online Unweighted Affiliation

Added

2026-10-27

Citation

L. Backstrom, D. Huttenlocher, J. Kleinberg, and X. Lan, "Group Formation in Large Social Networks: Membership, Growth, and Evolution." Proceedings of the 12th ACM SIGKDD International Conference on Knowledge Discovery and Data Mining (KDD), 44-54 (2006). 10.1145/1150402.1150412 Sci-Hub
J. Leskovec, K. J. Lang, A. Dasgupta, and M. W. Mahoney, "Community Structure in Large Networks: Natural Cluster Sizes and the Absence of Large Well-Defined Clusters." Internet Mathematics 6(1), 29-123 (2009). 10.1080/15427951.2009.10129177 Sci-Hub

Upstream URL OK

https://snap.stanford.edu/data/soc-lj-friends.html
https://snap.stanford.edu/data/soc-lj-comm-members.html
https://snap.stanford.edu/data/soc-lj-comm-watchers.html

Networks

Tip: click on a column header to sort the list, or hover over it for a description.

Column legend

$\left<k\right>$: Mean degree
$\sigma_k$: Standard deviation of the degrees
$\lambda_h$: Largest eigenvalue of the Hashimoto (non-backtracking) matrix
$\tau$: Random walk mixing time
$r$: Degree assortativity
$c$: Global clustering coefficient
$\oslash$: (Pseudo-) diameter
$S$: Relative size of the largest component
NPs: Node properties
EPs: Edge properties

Name	Nodes	Edges	$\left<k\right>$	$\sigma_k$	$\lambda_h$	$\tau$	$r$	$c$	$\oslash$	$S$	Kind	Mode	NPs	gt	GraphML	GML	csv
friends_01	3,576,369	47,369,551	13.25	56.96	450.98	6432.40	0.09	0.15	22	0.99	Directed	Unipartite	user_id	113.1 MiB	215.6 MiB	208.5 MiB	191.9 MiB
friends_02	3,621,584	48,079,511	13.28	57.25	450.85	5465.63	0.09	0.15	22	0.99	Directed	Unipartite	user_id	116.3 MiB	219.6 MiB	212.9 MiB	195.5 MiB
friends_03	3,661,017	48,726,492	13.31	57.60	450.48	5538.09	0.09	0.14	22	0.99	Directed	Unipartite	user_id	117.9 MiB	222.7 MiB	215.8 MiB	198.0 MiB
friends_04	3,690,794	48,594,871	13.17	57.46	451.20	6220.19	0.09	0.15	21	0.99	Directed	Unipartite	user_id	117.8 MiB	219.7 MiB	213.1 MiB	198.4 MiB
friends_05	3,730,387	49,888,235	13.37	58.24	451.20	6214.69	0.09	0.15	19	0.99	Directed	Unipartite	user_id	120.6 MiB	226.4 MiB	219.8 MiB	203.3 MiB
friends_06	3,751,533	50,284,583	13.40	58.49	450.84	6223.92	0.09	0.15	19	0.99	Directed	Unipartite	user_id	121.5 MiB	226.2 MiB	219.3 MiB	205.1 MiB
friends_07	3,768,257	50,572,929	13.42	58.67	450.69	6230.12	0.10	0.15	19	0.99	Directed	Unipartite	user_id	122.0 MiB	227.9 MiB	220.1 MiB	206.0 MiB
friends_08	3,799,631	50,983,630	13.42	58.89	450.62	18179.89	0.10	0.15	20	0.99	Directed	Unipartite	user_id	123.2 MiB	229.3 MiB	221.9 MiB	207.9 MiB
friends_09	3,841,601	51,687,140	13.45	59.20	448.60	18490.24	0.10	0.15	20	0.99	Directed	Unipartite	user_id	124.9 MiB	232.7 MiB	225.4 MiB	210.5 MiB
friends_10	3,892,465	52,516,990	13.49	59.82	450.70	13750.51	0.10	0.15	20	0.99	Directed	Unipartite	user_id	127.2 MiB	237.4 MiB	229.2 MiB	215.1 MiB
friends_11	3,920,487	52,983,117	13.51	60.09	450.61	14716.91	0.10	0.15	20	0.99	Directed	Unipartite	user_id	128.3 MiB	241.9 MiB	234.0 MiB	216.4 MiB
friends_12	4,036,538	55,006,975	13.63	61.76	448.98	13673.08	0.11	0.14	21	0.99	Directed	Unipartite	user_id	133.7 MiB	250.4 MiB	242.3 MiB	225.2 MiB
members_05	1,522,150	10,459,169	13.74	166.30	253.53	389.18	-0.02	0.00	17	0.99	Undirected	Bipartite	is_community user_id community_id	22.6 MiB	42.2 MiB	42.0 MiB	46.0 MiB
members_06	1,535,897	10,599,829	13.80	167.40	256.64	399.25	-0.02	0.00	18	0.99	Undirected	Bipartite	is_community user_id community_id	22.8 MiB	42.8 MiB	42.6 MiB	46.7 MiB
members_07	1,546,625	10,709,929	13.85	168.99	259.43	399.25	-0.02	0.00	18	0.99	Undirected	Bipartite	is_community user_id community_id	23.1 MiB	43.3 MiB	43.2 MiB	47.1 MiB
members_08	1,568,567	10,923,608	13.93	170.32	263.14	416.43	-0.02	0.00	18	0.99	Undirected	Bipartite	is_community user_id community_id	23.6 MiB	43.9 MiB	43.9 MiB	48.0 MiB
members_09	1,591,164	11,146,470	14.01	171.31	267.65	399.25	-0.02	0.00	18	0.99	Undirected	Bipartite	is_community user_id community_id	24.0 MiB	44.3 MiB	44.1 MiB	48.9 MiB
members_10	1,625,776	11,500,965	14.15	172.92	267.86	399.25	-0.02	0.00	18	0.99	Undirected	Bipartite	is_community user_id community_id	24.8 MiB	46.1 MiB	45.7 MiB	50.5 MiB
members_11	1,645,284	11,709,000	14.23	174.13	271.57	334.30	-0.02	0.00	18	0.99	Undirected	Bipartite	is_community user_id community_id	25.3 MiB	47.3 MiB	46.8 MiB	51.5 MiB
members_12	1,726,665	12,572,267	14.56	177.60	281.02	279.20	-0.02	0.00	17	0.99	Undirected	Bipartite	is_community user_id community_id	27.1 MiB	50.1 MiB	49.9 MiB	55.1 MiB
watchers_05	1,121,911	8,152,295	14.53	73.28	182.73	924.31	-0.05	0.00	20	0.99	Undirected	Bipartite	is_community user_id community_id	17.7 MiB	33.2 MiB	33.0 MiB	35.3 MiB
watchers_06	1,133,705	8,287,306	14.62	74.28	185.11	924.30	-0.05	0.00	22	0.99	Undirected	Bipartite	is_community user_id community_id	18.0 MiB	34.0 MiB	33.9 MiB	35.9 MiB
watchers_07	1,142,964	8,393,172	14.69	75.14	187.15	924.30	-0.05	0.00	22	0.99	Undirected	Bipartite	is_community user_id community_id	18.2 MiB	34.0 MiB	33.8 MiB	36.2 MiB
watchers_08	1,161,183	8,586,466	14.79	76.40	189.64	919.32	-0.05	0.00	22	0.99	Undirected	Bipartite	is_community user_id community_id	18.6 MiB	35.1 MiB	34.9 MiB	37.2 MiB
watchers_09	1,179,546	8,786,316	14.90	77.71	192.32	916.71	-0.05	0.00	21	0.99	Undirected	Bipartite	is_community user_id community_id	19.0 MiB	36.1 MiB	35.9 MiB	38.0 MiB
watchers_10	1,208,728	9,115,150	15.08	79.75	193.10	916.70	-0.05	0.00	20	0.99	Undirected	Bipartite	is_community user_id community_id	19.8 MiB	37.8 MiB	37.7 MiB	39.5 MiB
watchers_11	1,226,781	9,305,485	15.17	80.95	195.76	916.70	-0.05	0.00	20	0.99	Undirected	Bipartite	is_community user_id community_id	20.2 MiB	38.8 MiB	38.8 MiB	40.3 MiB
watchers_12	1,332,650	10,130,243	15.20	96.08	203.53	916.70	-0.03	0.00	20	0.99	Undirected	Bipartite	is_community user_id community_id	21.9 MiB	40.3 MiB	40.4 MiB	44.1 MiB