Earthquake with magnitude of Mw 4.4 on date 21-05-2016 and time 18:33:09 (Italy) in region Macedonia [Land]

A magnitude Mw 4.4 earthquake occured in region: Macedonia [Land], on

  • 21-05-2016 16:33:09 (UTC)
  • 21-05-2016 18:33:09 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 41.23, 20.99 at 15 km depth.

The earthquake was located by: TDMT-INGV Revised.

Search earthquakes: Any within 30 km radius

The values of hypocentral coordinates and magnitude may be revised at a later time as more information becomes available.

Municipalities within 20 km from the epicenter

No Italian municipalities within 20 km distance.

Municipalities with at least 50000 inhabitants

No Italian municipalities within 100 km from the epicenter with at least 50000 inhabitants.

Recent and historical Seismicity
Seismic hazard
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Rev 501 Mw 4.4 2016-05-21
16:33:09
41.23 20.99 15 2016-05-22
20:58:10
TDMT-INGV Revised 25277211
Rev 100 mb 5.1
Mwp 4.8
2016-05-21
16:33:09
41.23 20.99 10 2016-05-21
16:55:28
Sala Sismica INGV-Roma 25246221
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2016-05-21 16:33:09
Latitude 41.23
Longitude 20.99
Depth (km) 15 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin preliminary
Version 501 -> tdmt_reviewer
Event type earthquake
Origin ID 25277211

Uncertainty

Field Value
Preferred uncertainty description
Semi-major axis of confidence ellipse (meter)
Semi-minor axis of confidence ellipse (meter)
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi)
Circular confidence region, given by single value of horizontal uncertainty (meter)
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree)
Number of associated phases, regardless of their use for origin computation 1
Number of defining phases 1
RMS of the travel time residuals of the arrivals used for the origin computation (sec)
Epicentral distance of station closest to the epicenter (degree)
Epicentral distance of station farthest from the epicenter (degree)
Number of stations at which the event was observed 0
Number of stations from which data was used for origin computation 0
Magnitudes information

Mwp:4.8

Field Value
Value 4.8
Uncertainty 0.2
Num. used stations 12
Type of magnitude Mwp
Reference to an origin 25246221
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2016-05-21 16:55:28

Mw:4.4

Field Value
Value 4.4
Uncertainty
Num. used stations
Type of magnitude Mw
Reference to an origin 25277211
Agency INGV
Autore TDMT-INGV Revised
Time of creation (UTC) 2016-05-22 20:58:10

mb:5.1

Field Value
Value 5.1
Uncertainty 0.3
Num. used stations 37
Type of magnitude mb
Reference to an origin 25246221
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2016-05-21 16:55:28
TDMT - Time Domain Moment Tensor

TDMT details

Field Value
Magnitude4.4
Scalar Moment5.40067E+22 dyne-cm
Computed depth15 km
QualityAa
Variance Reduction67.64%
Double Couple71%
CLVD29%
ISO0%
Model usedCIA
Modemanual
Statusreviewed

Moment Tensor Components

Component Value
Mrr-4.3738E+22
Mtt-4.2813E+21
Mpp4.80193E+22
Mrt1.53096E+22
Mrp-3.484E+20
Mtp2.48397E+22

Nodal Planes

Name Strike Dip Rake
PN122252-62
PN2146-121

Focal Mechanism

Focal Mechanism

psmeca (GMT documentation)

20.9888 41.2295 15 222 52 -62 1 46 -121 5.40067 22 21.4888 41.7295

TDMT references

More info and references

Station Distribution

Station Distribution

TDMT station details

Sta Dist Azi V R zcor
VTS 241.9 49.6 50.13% 114
SRS 218.2 92.7 49.06% 112
FNA 59.8 146.1 73.66% 98
TIR 95.2 278.3 78.47% 101
PDG 195.9 313.5 75.29% 112
DIVS 329 345.9 52.5% 124
GRG 122.6 103.9 70.89% 104
LKD2 272.5 186.1 50.78% 125
VLO 151.6 236.6 72.85% 110
SCTE 249 239.8 64.2% 121
Focal Mechanism in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download