Country intelligence page

El Salvador SLV

Operation Storms Amanda and Cristobal Response in El Salvador at Admin 1. Every comparison below is confined to this operation, because operations differ in geographic scope, cadence and method and are not additive.

Present IDPs, latest round

2,077

Round 2, 30 Jun 2020

Baseline round

4,752

Round 1, 30 Jun 2020

Absolute changeMOSAIC-derived

-2,675

Difference in present IDPs between the two rounds

Displacement momentumMOSAIC-derived

-56.3%

Significant reduction or return signal

Assessment recency

2257d

Latest report older than 365 days

Data confidenceMOSAIC-derived

low confidence in comparability, out of 100

Comparability flags on this comparison

Assessed-unit count changed between rounds

What changed?MOSAIC-derived

Comparing round 2 (30 Jun 2020) with round 1 (30 Jun 2020) inside the Storms Amanda and Cristobal Response in El Salvador operation. Thresholds are MOSAIC monitoring settings, not IOM categories.

Ranked by change in individuals

Areas in El Salvador ranked by largest absolute increase between the two most recent comparable DTM rounds
Area	Latest	Baseline	Change	Momentum	Comparability	Analysis
San Salvador	1,236	2,917	-1,681	-57.6%	Built from a single source record
La Libertad	546	1,835	-1,289	-70.2%	Built from a single source record

Methodology and provenance

Source: International Organization for Migration (IOM), Displacement Tracking Matrix (DTM). Public API v3.
Endpoint: /v3/displacement/admin1
Geographic level: Admin 1
Operation: Storms Amanda and Cristobal Response in El Salvador
Reporting period: 30 Jun 2020 to 30 Jun 2020
Assessment round: Round 2 compared with round 1
Retrieved: 2026-09-04T01:34:17.755Z
Calculation: Rows are summed to a present-IDP figure per area and round, then the latest round is compared with the preceding round of the same operation. Areas present in only one of the two rounds are reported as such and are never treated as zero.

Known limitations

An area that disappears between rounds may have ceased to be assessed rather than ceased to host displacement.
A newly reported area may be newly affected or newly assessed. The API does not distinguish between these.
Threshold bands are MOSAIC monitoring settings and are not calibrated to this country's assessment cadence.

Displacement Momentum is the proportional change in present IDP individuals between an administrative unit's latest comparable DTM assessment round and the preceding round within the same DTM operation. Bands are MOSAIC-defined monitoring thresholds, not IOM classifications. A momentum value is not computed where a baseline is missing or zero.

MOSAIC-derived indicator. Not an IOM classification.

National displacement timeline

Present IDPs by assessment round within the Storms Amanda and Cristobal Response in El Salvador operation. Breaks in the line mark non-consecutive round numbers, where an intervening round exists that this series does not include.

Methodology and provenance

Source: International Organization for Migration (IOM), Displacement Tracking Matrix (DTM). Public API v3.
Endpoint: /v3/displacement/admin1
Geographic level: Admin 1
Operation: Storms Amanda and Cristobal Response in El Salvador
Reporting period: 2020-06-30 to 2020-06-30
Assessment round: Round 2
Retrieved: 2026-09-04 01:34 UTC
Calculation: Present IDP figures are summed across all disaggregated source rows for each area, then across areas, for every round of the selected operation.

Known limitations

Figures may be estimates derived from key informants and secondary sources rather than exact enumeration.
Assessment coverage and cadence vary by country and operation, so cross-country comparison of change rates is not supported.
A change in a recorded figure may reflect population movement, altered assessment coverage, changed access, or enumeration method, and the API does not distinguish between these.
The public API exposes aggregated non-sensitive figures only, and does not carry the full detail of the underlying DTM datasets.

Admin 1 ranking, latest round

Areas ranked by present IDPs reported in the latest round. Bar length is proportional to the largest area.

San Salvador1,236
-57.6%
La Libertad546
-70.2%
La Paz89
Not reported
Morazan80
Not reported
Chalatenango45
Not reported
La Union37
Not reported
Sonsonate22
Not reported
Santa Ana17
Not reported
Usulutan5
Not reported

Methodology and provenance

Source: International Organization for Migration (IOM), Displacement Tracking Matrix (DTM). Public API v3.
Endpoint: /v3/displacement/admin1
Geographic level: Admin 1
Operation: Storms Amanda and Cristobal Response in El Salvador
Reporting period: 30 Jun 2020
Assessment round: Round 2
Retrieved: 2026-09-04 01:34 UTC
Calculation: Areas assessed in the latest round of this operation, ranked by summed present IDP individuals. Momentum shown alongside is the change from the preceding round.

Known limitations

Only areas assessed in the latest round appear. An unassessed area is absent, not zero.
Bar length encodes the reported figure only. It carries no information about area size, population or need.

MOSAIC-derived indicator. Not an IOM classification.

Anomaly signalsMOSAIC-derived

Areas whose latest figure moved unusually relative to their own recent history in this operation. Each signal names the rule that fired and the evidence behind it. A signal is a cue for collection, not a finding.

San SalvadorAbrupt decrease
Latest
1,236
Baseline
2,917
Magnitude
-0.58
Basis
2 obs, low
Latest round-to-round change is at or below -25 per cent and the absolute decrease is at least 1,000 individuals. Fewer than three observations in this operation. The historical baseline is too short to characterise normal variation.
La LibertadAbrupt decrease
Latest
546
Baseline
1,835
Magnitude
-0.70
Basis
2 obs, low
Latest round-to-round change is at or below -25 per cent and the absolute decrease is at least 1,000 individuals. Fewer than three observations in this operation. The historical baseline is too short to characterise normal variation.
La PazNewly observed location
Latest
89
Baseline
Not reported
Magnitude
89.00
Basis
1 obs, low
The unit reports displacement in the latest round and has no prior observation in this operation. Fewer than three observations in this operation. The historical baseline is too short to characterise normal variation.
MorazanNewly observed location
Latest
80
Baseline
Not reported
Magnitude
80.00
Basis
1 obs, low
The unit reports displacement in the latest round and has no prior observation in this operation. Fewer than three observations in this operation. The historical baseline is too short to characterise normal variation.
ChalatenangoNewly observed location
Latest
45
Baseline
Not reported
Magnitude
45.00
Basis
1 obs, low
The unit reports displacement in the latest round and has no prior observation in this operation. Fewer than three observations in this operation. The historical baseline is too short to characterise normal variation.
La UnionNewly observed location
Latest
37
Baseline
Not reported
Magnitude
37.00
Basis
1 obs, low
The unit reports displacement in the latest round and has no prior observation in this operation. Fewer than three observations in this operation. The historical baseline is too short to characterise normal variation.
SonsonateNewly observed location
Latest
22
Baseline
Not reported
Magnitude
22.00
Basis
1 obs, low
The unit reports displacement in the latest round and has no prior observation in this operation. Fewer than three observations in this operation. The historical baseline is too short to characterise normal variation.
Santa AnaNewly observed location
Latest
17
Baseline
Not reported
Magnitude
17.00
Basis
1 obs, low
The unit reports displacement in the latest round and has no prior observation in this operation. Fewer than three observations in this operation. The historical baseline is too short to characterise normal variation.
UsulutanNewly observed location
Latest
5
Baseline
Not reported
Magnitude
5.00
Basis
1 obs, low
The unit reports displacement in the latest round and has no prior observation in this operation. Fewer than three observations in this operation. The historical baseline is too short to characterise normal variation.

Methodology and provenance

Source: International Organization for Migration (IOM), Displacement Tracking Matrix (DTM). Public API v3.
Endpoint: /v3/displacement/admin1
Geographic level: Admin 1
Operation: Storms Amanda and Cristobal Response in El Salvador
Reporting period: 2020-06-30 to 2020-06-30
Assessment round: Round 2
Retrieved: 2026-09-04 01:34 UTC
Calculation: Transparent statistical rules applied to each area's own trailing series within the operation. No model is fitted and no learned parameters are used.

Known limitations

An anomaly can be produced by a change in assessment coverage or method rather than by population movement.
Areas with short histories are flagged as low quality because normal variation cannot be characterised.
The public API supplies no adjacency graph, so no claim of spatial contiguity is made.

MOSAIC-derived indicator. Not an IOM classification.

Geographic concentrationMOSAIC-derived

Displacement is moderately concentrated across 9 assessed units, with 90.1 per cent in the largest 3.

Largest areas by share of national present IDPs
Area	Present IDPs	Share
San Salvador	1,236	59.5%
La Libertad	546	26.3%
La Paz	89	4.3%

Normalised concentration index: 0.356 on a zero-to-one scale across 9 assessed areas.

Methodology and provenance

Source: International Organization for Migration (IOM), Displacement Tracking Matrix (DTM). Public API v3.
Endpoint: /v3/displacement/admin1
Geographic level: Admin 1
Operation: Storms Amanda and Cristobal Response in El Salvador
Reporting period: 30 Jun 2020
Assessment round: Round 2
Retrieved: 2026-09-04 01:34 UTC
Calculation: Concentration is computed over the administrative units reported in the selected round of the selected DTM operation. It uses the Herfindahl-Hirschman Index of unit shares, normalised so that zero is an even distribution across assessed units and one is total concentration in a single unit. Units not assessed in the round are absent from the calculation, so a narrowing of assessment coverage will raise measured concentration without any population movement.

Known limitations

Concentration rises mechanically when assessment coverage narrows, with no population movement required.

MOSAIC-derived indicator. Not an IOM classification.

Coverage and confidenceMOSAIC-derived

What the observation process supports, stated separately from what the figures say.

Assessed areas, latest: 9
Assessed areas, baseline: 2
Rounds in operation: 2
Median round interval: n/a

The most recent assessment in this operation is more than a year old. Treat every derived indicator as historical rather than current.
7 administrative units appear in the latest round without a prior observation. A first appearance produces no momentum value.

Confidence derivation

The change should not be treated as a monitoring signal on its own. Comparability, coverage or recency conditions materially limit interpretation.

−10: Assessed-unit count changed between the two rounds
−25: Latest assessment is more than a year old
−20: Fewer than three observations of this unit in the operation
−10: Operation has fewer than three rounds of history

Methodology and provenance

Source: International Organization for Migration (IOM), Displacement Tracking Matrix (DTM). Public API v3.
Endpoint: /v3/displacement/admin1
Geographic level: Admin 1
Operation: Storms Amanda and Cristobal Response in El Salvador
Reporting period: 2020-06-30 to 2020-06-30
Assessment round: Round 2
Retrieved: 2026-09-04 01:34 UTC
Calculation: MOSAIC confidence describes how well a change is grounded in comparable DTM observations. It begins at 100 and applies fixed deductions for missing baselines, non-consecutive rounds, coverage changes, short unit histories and assessment age. It is a statement about data comparability and recency only. It carries no claim about the cause of a change.

Known limitations

Confidence describes data comparability and recency only. It carries no claim about the cause of a change.

MOSAIC-derived indicator. Not an IOM classification.

Recorded displacement reason, latest round

Taken directly from the DTM records. This is a source field, not a MOSAIC classification.

Present IDPs by recorded displacement reason
Reason	Present IDPs	Share
Natural disaster	2,077	100.0%

Methodology and provenance

Source: International Organization for Migration (IOM), Displacement Tracking Matrix (DTM). Public API v3.
Endpoint: /v3/displacement/admin1
Geographic level: Admin 1
Operation: Storms Amanda and Cristobal Response in El Salvador
Reporting period: 30 Jun 2020
Assessment round: Round 2
Retrieved: 2026-09-04 01:34 UTC
Calculation: The displacementReason field on each source row, summed over the latest round of the selected operation.

Known limitations

Reason is recorded at assessment. It reflects the reason as reported, and may not capture compound or sequential causes.

Generate analyst brief

A deterministic, template-generated brief covering situation snapshot, key changes, trend, concentration, anomalies, analytic questions, information gaps, collection priorities and methodological caveats. No generative model is in the path, so the same data always produces the same brief.

Markdown brief JSON Unit-level CSV