Earthquake with magnitude of ML 1.5 on date 01-09-2021 and time 06:25:56 (Italy) in region Golfo di Trieste (Trieste, Gorizia, Udine)

A magnitude ML 1.5 earthquake occured in region: Golfo di Trieste (Trieste, Gorizia, Udine), on

  • 01-09-2021 04:25:56 (UTC)
  • 01-09-2021 06:25:56 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 45.435, 13.252 at 9 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

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

An earthquake occurred to
47 Km SW of Trieste (204420 inhabitants)
70 Km S of Udine (99169 inhabitants)
71 Km E of Venezia (263352 inhabitants)
74 Km SE of Pordenone (51229 inhabitants)
83 Km E of Treviso (83731 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Preliminary map of the earthquake effects from the web questionnaire

Preliminary map of the earthquake effects from the web questionnaire

This map shows the distribution of earthquake resentment in the area, expressed in terms of intensity on the MCS scale (Mercalli-Cancani-Sieberg). Intensities are determined using data from questionnaires collected on the website http://www.hsit.it. The intensities shown are determined considering all the reports received from each municipality, and are all the more reliable the greater the number of questionnaires. The collected data are subjected to an automatic statistical filter, but are not checked individually. In particular, intensities greater than or equal to the VI degree of the MCS or EMS scale require on-site verification by specialized personnel. The black star is the epicenter of the earthquake that occurred. This map is updated every time citizens fill out new questionnaires. The number of questionnaires processed to obtain this map, the date and time of the last update are shown at the top right.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100
ML 1.5 2021-09-01
04:25:56
45.435 13.2522 9 2021-09-01
04:35:31
Sala Sismica INGV-Roma 94894921
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-01 04:25:56 ± 0.26
Latitude 45.4350 ± 0.0225
Longitude 13.2522 ± 0.0090
Depth (km) 9 ± 3 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 94894921

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 2354
Semi-minor axis of confidence ellipse (meter) 754
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 185
Circular confidence region, given by single value of horizontal uncertainty (meter) 2350
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 264
Number of associated phases, regardless of their use for origin computation 31
Number of defining phases 14
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.2
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.90652
Number of stations at which the event was observed 24
Number of stations from which data was used for origin computation 7
Magnitude information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.2
Num. used stations 18
Type of magnitude ML
Reference to an origin 94894921
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-01 04:35:31
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.SPS2.HHZ. 2021-09-01T04:27:35.96 3.0 negative manual Pn 0.22 0
IV.CAR1.HHZ. 2021-09-01T04:27:29.20 3.0 negative manual Pn -6.59 0
IV.CDRU.HHZ. 2021-09-01T04:27:28.14 3.0 negative manual Pg 11.39 0
IV.CERT.HHZ. 2021-09-01T04:27:24.23 3.0 undecidable manual Sn -9.99 0
CR.STON.BHZ. 2021-09-01T04:27:06.68 3.0 undecidable manual Pg 5.03 0
GU.GSCL.HHZ. 2021-09-01T04:27:06.61 3.0 undecidable manual Sg 3.11 0
IV.BARO.EHZ. 2021-09-01T04:26:51.12 3.0 positive manual Pg 0.07 0
IV.RIBO.EHZ.01 2021-09-01T04:26:45.86 3.0 undecidable manual Pn -0.07 0
IV.ARRO.EHZ. 2021-09-01T04:26:37.73 3.0 undecidable manual Pn -7.55 0
SL.KOGS.BHZ. 2021-09-01T04:26:36.37 3.0 undecidable manual Pn 0.85 0
IV.CADC.EHZ. 2021-09-01T04:26:35.51 3.0 positive manual Pn 1.41 0
IV.ATMI.HHZ. 2021-09-01T04:26:35.11 3.0 undecidable manual Pg -0.99 0
SL.LJU.BHZ. 2021-09-01T04:26:31.17 3.0 undecidable manual S -2.9 0
IV.STAL.HHZ. 2021-09-01T04:26:26.21 0.3 undecidable manual S 336 0.9065 50 -0.1 75
NI.PALA.HHZ. 2021-09-01T04:26:24.63 0.3 undecidable manual S 344 0.8409 50 0.27 73
NI.VINO.HHZ. 2021-09-01T04:26:23.25 0.3 undecidable manual S 1 0.8184 50 -0.44 71
OX.CAE.HHZ. 2021-09-01T04:26:23.33 0.6 undecidable manual S 316 0.8076 50 -0.03 51
OX.DRE.HHZ. 2021-09-01T04:26:22.83 0.3 undecidable manual S 20 0.7869 50 0.07 77
IV.FVI.HHZ. 2021-09-01T04:26:18.60 3.0 undecidable manual P -0.42 0
OX.SABO.HHZ. 2021-09-01T04:26:17.99 0.3 undecidable manual S 26 0.6133 50 0.39 75
OX.PLRO.HHZ. 2021-09-01T04:26:17.15 3.0 undecidable manual P -0.38 0
OX.CLUD.HHZ. 2021-09-01T04:26:15.86 3.0 positive manual P -0.52 0
OX.VARN.HHZ. 2021-09-01T04:26:14.74 3.0 negative manual P -1.05 0
IV.STAL.HHZ. 2021-09-01T04:26:13.51 0.1 undecidable manual P 336 0.9065 50 -0.21 97
NI.PALA.HHZ. 2021-09-01T04:26:12.62 0.3 undecidable manual P 344 0.8409 50 0.02 77
MN.TRI.HHZ. 2021-09-01T04:26:12.62 0.3 undecidable manual S 52 0.4506 50 -0.17 81
NI.VINO.HHZ. 2021-09-01T04:26:12.05 0.1 undecidable manual P 1 0.8184 50 -0.16 100
OX.CAE.HHZ. 2021-09-01T04:26:12.25 0.1 undecidable manual P 316 0.8076 50 0.23 99
OX.DRE.HHZ. 2021-09-01T04:26:11.76 0.3 undecidable manual P 20 0.7869 50 0.09 77
OX.SABO.HHZ. 2021-09-01T04:26:08.80 0.3 undecidable manual P 26 0.6133 50 0.1 79
MN.TRI.HHZ. 2021-09-01T04:26:05.87 1.0 undecidable manual P 52 0.4506 50 -0.05 28
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
MN.TRI.HHE. ML:1.2 4.255E-5 1.08 AML other m 2021-09-01T04:26:14.54
OX.SABO.HNE. ML:2.2 0.0002605 0.42 AML other m 2021-09-01T04:26:14.34
OX.SABO.HNN. ML:2.3 0.00031445 1.04 AML other m 2021-09-01T04:26:14.46
MN.TRI.HHN. ML:0.9 2.09E-5 0.08 AML other m 2021-09-01T04:26:15.48
OX.SABO.HHN. ML:1.5 6.1E-5 0.2 AML other m 2021-09-01T04:26:18.41
OX.SABO.HHE. ML:1.5 5.525E-5 0.82 AML other m 2021-09-01T04:26:18.52
NI.VINO.HHE. ML:1.5 3.495E-5 0.26 AML other m 2021-09-01T04:26:23.67
OX.CAE.HHN. ML:1.3 2.585E-5 0.74 AML other m 2021-09-01T04:26:24.46
NI.VINO.HHN. ML:1.5 3.57E-5 0.4 AML other m 2021-09-01T04:26:24.76
OX.CAE.HHE. ML:1.5 3.475E-5 1.36 AML other m 2021-09-01T04:26:25.14
NI.PALA.HHE. ML:1.5 3.375E-5 1.16 AML other m 2021-09-01T04:26:26.90
IV.STAL.HHN. ML:1.6 3.79E-5 0.34 AML other m 2021-09-01T04:26:28.30
NI.PALA.HHN. ML:1.4 3.22E-5 1.22 AML other m 2021-09-01T04:26:30.61
IV.STAL.HHE. ML:1.5 2.865E-5 0.26 AML other m 2021-09-01T04:26:30.67
OX.VARN.HHN. ML:1.5 3.045E-5 0.54 AML other m 2021-09-01T04:26:30.91
OX.VARN.HHE. ML:1.8 4.92E-5 1.6 AML other m 2021-09-01T04:26:31.95
OX.PLRO.HHE. ML:1.4 1.94E-5 0.58 AML other m 2021-09-01T04:26:32.30
OX.PLRO.HHN. ML:1.6 2.865E-5 0.2 AML other m 2021-09-01T04:26:32.71
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download