Earthquake with magnitude of ML 0.8 on date 29-07-2021 and time 14:29:25 (Italy) in region Costa Ligure Occidentale (Imperia)

A magnitude ML 0.8 earthquake occured in region: Costa Ligure Occidentale (Imperia), on

  • 29-07-2021 12:29:25 (UTC)
  • 29-07-2021 14:29:25 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.885, 7.424 at 10 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

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Olivetta San Michele IM 8 211 211
Airole IM 11 407 618
Rocchetta Nervina IM 14 298 916
Dolceacqua IM 17 2074 2990
Isolabona IM 17 679 3669
Ventimiglia IM 18 24310 27979
Camporosso IM 18 5632 33611
Apricale IM 19 629 34240
San Biagio della Cima IM 20 1329 35569
Soldano IM 20 977 36546

Municipalities with at least 50000 inhabitants

An earthquake occurred to
30 Km W of Sanremo (54807 inhabitants)
58 Km S of Cuneo (56081 inhabitants)
97 Km W of Savona (61345 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
Md 1.3
ML 0.8
2021-07-29
12:29:25
43.8853 7.4237 10 2021-07-29
12:43:24
Sala Sismica INGV-Roma 93353081
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-07-29 12:29:25 ± 0.16
Latitude 43.8853 ± 0.0072
Longitude 7.4237 ± 0.0100
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 93353081

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 980
Semi-minor axis of confidence ellipse (meter) 567
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 220
Circular confidence region, given by single value of horizontal uncertainty (meter) 980
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 204
Number of associated phases, regardless of their use for origin computation 38
Number of defining phases 18
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.28
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.6592
Number of stations at which the event was observed 28
Number of stations from which data was used for origin computation 9
Magnitudes information

ML:0.8

Field Value
Value 0.8
Uncertainty 0.3
Num. used stations 6
Type of magnitude ML
Reference to an origin 93353081
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-07-29 12:43:24

Md:1.3

Field Value
Value 1.3
Uncertainty 0.3
Num. used stations 2
Type of magnitude Md
Reference to an origin 93353081
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-07-29 12:43:24
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.MARS.HNZ. 2021-07-29T12:31:07.07 3.0 undecidable manual Pg 10.43 0
IV.PLLN.EHZ. 2021-07-29T12:31:03.41 3.0 undecidable manual Pn 0.68 0
IV.MFNL.HHZ. 2021-07-29T12:30:52.80 3.0 negative manual Pn -5.2 0
IV.MRLC.HHZ. 2021-07-29T12:30:46.52 3.0 undecidable manual Pn -0.37 0
IV.CDRU.HHZ. 2021-07-29T12:30:46.11 3.0 undecidable manual Pn -1.17 0
IX.RSF3.HHZ.02 2021-07-29T12:30:39.08 3.0 undecidable manual Pn -3.52 0
IV.FIU.EHZ. 2021-07-29T12:30:36.94 3.0 undecidable manual Sg 8.6 0
IV.SACS.HHZ. 2021-07-29T12:30:36.46 3.0 undecidable manual Sn 0.22 0
OX.CLUD.HHZ. 2021-07-29T12:30:32.92 3.0 negative manual Pg 12.03 0
IV.TST02.HHZ. 2021-07-29T12:30:31.52 3.0 undecidable manual Pn 2.71 0
MN.TRI.HHZ. 2021-07-29T12:30:31.81 3.0 negative manual Pg 9.15 0
IV.IMOL.HNZ. 2021-07-29T12:30:30.34 3.0 undecidable manual Sn -0.24 0
NI.VINO.HHZ. 2021-07-29T12:30:25.52 3.0 negative manual Pn 3.25 0
IV.CADC.HNZ. 2021-07-29T12:30:23.27 3.0 undecidable manual Sg 2.21 0
IV.NDIM.HHZ. 2021-07-29T12:30:18.76 3.0 undecidable manual Sn -2.89 0
OX.CIMO.HHZ. 2021-07-29T12:30:15.24 3.0 undecidable manual Pn -1.18 0
IV.RCAV.EHZ. 2021-07-29T12:30:15.16 3.0 undecidable manual Pn -1.39 0
IV.OPPE.HNZ. 2021-07-29T12:29:59.22 3.0 negative manual Pn 0.96 0
IV.IMOL.HNZ. 2021-07-29T12:29:56.69 3.0 undecidable manual Pn -1.15 0
IV.CAPR.HNZ. 2021-07-29T12:29:56.99 3.0 undecidable manual Pg 3.48 0
GU.PZZ.HHE. 2021-07-29T12:29:46.90 0.3 undecidable manual S 341 0.6592 50 -0.26 68
GU.RORO.HHE. 2021-07-29T12:29:42.87 0.3 undecidable manual S 64 0.5153 50 -0.02 73
GU.GBOS.HHE. 2021-07-29T12:29:41.17 0.3 undecidable manual S 40 0.4649 50 -0.24 71
GU.PZZ.HHE. 2021-07-29T12:29:38.04 0.3 undecidable manual P 341 0.6592 50 0.23 68
GU.IMI.HHZ. 2021-07-29T12:29:37.54 0.3 undecidable manual S 86 0.339 50 -0.14 74
GU.ENR.HHZ. 2021-07-29T12:29:37.53 0.3 undecidable manual S 359 0.3435 50 -0.29 72
GU.STV.HHZ. 2021-07-29T12:29:37.89 0.3 undecidable manual S 349 0.366 50 -0.6 66
GU.MGRO.HHE. 2021-07-29T12:29:36.95 0.3 undecidable manual S 60 0.3184 50 -0.11 75
GU.RORO.HHE. 2021-07-29T12:29:35.81 0.3 undecidable manual P 64 0.5153 50 0.47 67
GU.GBOS.HHE. 2021-07-29T12:29:34.51 0.6 undecidable manual P 40 0.4649 50 0.03 49
GU.STV.HHZ. 2021-07-29T12:29:33.00 0.1 undecidable manual P 349 0.366 50 0.2 97
GU.MGRO.HHE. 2021-07-29T12:29:32.27 0.1 undecidable manual P 60 0.3184 50 0.29 96
GU.IMI.HHZ. 2021-07-29T12:29:32.61 0.1 undecidable manual P 86 0.339 50 0.28 96
GU.ENR.HHZ. 2021-07-29T12:29:32.70 0.1 undecidable manual P 359 0.3435 50 0.28 96
FR.SAOF.HHZ.00 2021-07-29T12:29:31.36 0.3 undecidable manual S 43 0.1367 124 -0.07 78
GU.BURY.HHE. 2021-07-29T12:29:31.00 0.6 undecidable manual S 137 0.1403 124 -0.54 47
FR.SAOF.HHZ.00 2021-07-29T12:29:28.98 0.1 undecidable manual P 43 0.1367 124 0.26 100
GU.BURY.HHE. 2021-07-29T12:29:28.48 0.1 undecidable manual P 137 0.1403 124 -0.31 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
FR.SAOF.HHN.00 ML:1 0.000105 0.9 AML other m 2021-07-29T12:29:31.07
FR.SAOF.HHE.00 ML:0.9 8.115E-5 1.12 AML other m 2021-07-29T12:29:31.68
GU.ENR.HHE. ML:0.8 2.4E-5 0.32 AML other m 2021-07-29T12:29:37.50
GU.ENR.HHN. ML:0.8 2.53E-5 0.32 AML other m 2021-07-29T12:29:37.68
IV.TST02.HHN. ML:0 0.000994 0.74 AML other m 2021-07-29T12:30:33.62
IV.TST02.HHE. ML:0 0.00133 0.42 AML other m 2021-07-29T12:30:33.78
OX.CIMO.HHE. ML:2.6 1.735E-5 0.06 AML other m 2021-07-29T12:30:46.10
OX.CIMO.HHN. ML:2.5 1.032E-5 0.46 AML other m 2021-07-29T12:30:46.15
GU.STV.HHE. ML:0.6 1.43315825E-5 0.1408 AML other m 2021-07-29T12:29:38.12
GU.STV.HHN. ML:0.2 6.49475E-6 0.0832 AML other m 2021-07-29T12:29:38.13
FR.SAOF.HHZ.00 Md:1.1 8 END duration s
GU.IMI.HHZ. Md:1.4 11 END duration s
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