Earthquake (controlled explosion) with magnitude of ML 1.3 on date 26-08-2020 and time 12:15:27 (Italy) in region Costa Ligure centro occidentale (Savona)

A magnitude ML 1.3 (controlled explosion) earthquake occured in region: Costa Ligure centro occidentale (Savona), on

  • 26-08-2020 10:15:27 (UTC)
  • 26-08-2020 12:15:27 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.26, 8.58 at 0 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

Event type: controlled explosion.

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
Celle Ligure SV 9 5237 5237
Savona SV 9 61345 66582
Albissola Marina SV 9 5487 72069
Albisola Superiore SV 10 10163 82232
Varazze SV 11 13251 95483
Bergeggi SV 11 1129 96612
Vado Ligure SV 11 8336 104948
Spotorno SV 13 3803 108751
Quiliano SV 14 7232 115983
Noli SV 14 2736 118719
Cogoleto GE 15 9172 127891
Stella SV 16 3009 130900
Arenzano GE 18 11519 142419
Vezzi Portio SV 18 809 143228

Municipalities with at least 50000 inhabitants

An earthquake occurred to
9 Km SE of Savona (61345 inhabitants)
33 Km SW of Genova (586655 inhabitants)
72 Km S of Alessandria (93943 inhabitants)
77 Km SE of Asti (76202 inhabitants)
80 Km NE of Sanremo (54807 inhabitants)
83 Km E of Cuneo (56081 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
Bulletin
Rev1000
ML 1.3 2020-08-26
10:15:27
44.26 8.58 0 2020-11-19
12:37:06
Bollettino Sismico Italiano INGV 84259671
Reviewed
Rev100
ML 1.5 2020-08-26
10:15:27
44.26 8.57 2 2020-08-26
10:32:18
Sala Sismica INGV-Roma 82345001
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-08-26 10:15:27 ± 0.19
Latitude 44.26 ± 0.01
Longitude 8.58 ± 0.02
Depth (km) 0 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type controlled explosion
Origin ID 84259671

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1860
Semi-minor axis of confidence ellipse (meter) 840
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 327
Circular confidence region, given by single value of horizontal uncertainty (meter) 1860
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 179
Number of associated phases, regardless of their use for origin computation 16
Number of defining phases 16
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.36
Epicentral distance of station closest to the epicenter (degree) 0.17717
Epicentral distance of station farthest from the epicenter (degree) 1.09717
Number of stations at which the event was observed 16
Number of stations from which data was used for origin computation 16
Magnitudes information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.1
Num. used stations 18
Type of magnitude ML
Reference to an origin 82345001
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-08-26 10:32:18

ML:1.3

Field Value
Value 1.3
Uncertainty 0.2
Num. used stations 16
Type of magnitude ML
Reference to an origin 84259671
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-11-10 12:12:28
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
GU.PZZ.HHZ. 2020-08-26T10:15:48.57 0.3 undecidable manual P 284 1.072 50 0.1 65
GU.BHB.HHZ. 2020-08-26T10:15:48.85 0.3 undecidable manual P 302 1.0972 50 -0.04 65
GU.STV.HHZ. 2020-08-26T10:15:45.83 0.6 undecidable manual P 269 0.8966 50 0.36 42
IV.BOB.HHE. 2020-08-26T10:15:44.48 0.3 undecidable manual P 51 0.7977 50 0.7 58
FR.SAOF.HHZ.00 2020-08-26T10:15:43.54 0.6 undecidable manual P 250 0.7869 50 -0.04 46
GU.ENR.HHZ. 2020-08-26T10:15:43.72 0.6 undecidable manual P 268 0.8301 50 -0.61 40
IV.IMI.HHZ. 2020-08-26T10:15:40.51 0.1 undecidable manual P 235 0.6061 50 0.02 97
GU.ROTM.HHZ. 2020-08-26T10:15:40.39 0.6 undecidable manual P 345 0.6061 50 -0.1 48
GU.GORR.HHE. 2020-08-26T10:15:40.08 0.3 undecidable manual P 56 0.6142 50 -0.55 65
GU.MGRO.HHZ. 2020-08-26T10:15:39.94 0.1 undecidable manual P 248 0.5954 50 -0.37 91
GU.GBOS.HHE. 2020-08-26T10:15:38.30 0.1 undecidable manual P 268 0.5297 90 -0.77 80
GU.RORO.HHZ. 2020-08-26T10:15:36.22 0.1 undecidable manual P 248 0.3975 90 0.08 100
GU.RNCA.HHZ. 2020-08-26T10:15:34.95 0.3 undecidable manual P 52 0.3372 90 0.16 75
GU.PCP.HHZ. 2020-08-26T10:15:33.26 0.1 positive manual P 355 0.2779 90 -0.21 100
GU.CANO.HHZ. 2020-08-26T10:15:33.47 0.1 undecidable manual P 257 0.2509 90 0.59 91
IV.QLNO.HHZ. 2020-08-26T10:15:31.71 0.1 positive manual P 290 0.1772 90 0.48 96
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.QLNO.HHN. ML:1.3 0.0001665294 0.1856 AML other m 2020-08-26T10:15:34.97
IV.QLNO.HHE. ML:1.2 0.0001410318 0.1792 AML other m 2020-08-26T10:15:36.37
GU.PCP.HHE. ML:1.2 8.1950725E-5 0.1024 AML other m 2020-08-26T10:15:37.47
GU.CANO.HHE. ML:1.6 0.0002107404 0.2944 AML other m 2020-08-26T10:15:38.47
GU.CANO.HHN. ML:1.6 0.000203438 0.2176 AML other m 2020-08-26T10:15:41.87
GU.RNCA.HHE. ML:0.9 2.979824E-5 0.1024 AML other m 2020-08-26T10:15:42.30
GU.RNCA.HHN. ML:0.9 3.0174705E-5 0.1408 AML other m 2020-08-26T10:15:42.44
GU.MGRO.HHN. ML:1 1.978538E-5 0.2432 AML other m 2020-08-26T10:15:49.05
GU.MGRO.HHE. ML:1.2 2.89738E-5 0.2368 AML other m 2020-08-26T10:15:51.23
GU.MGRO.HNN. ML:1.3 4.2334445E-5 0.3392 AML other m 2020-08-26T10:15:55.82
GU.ENR.HHE. ML:1.4 3.0309075E-5 0.2368 AML other m 2020-08-26T10:15:58.90
GU.ENR.HHN. ML:1.6 4.2478375E-5 0.3648 AML other m 2020-08-26T10:15:59.34
GU.STV.HHN. ML:1.4 2.3152805E-5 0.4032 AML other m 2020-08-26T10:16:00.18
GU.STV.HHE. ML:1.2 1.5032905E-5 0.1984 AML other m 2020-08-26T10:16:03.11
GU.PZZ.HHE. ML:1.6 2.834145E-5 0.3584 AML other m 2020-08-26T10:16:06.05
GU.PZZ.HHN. ML:1.7 3.5600285E-5 0.4608 AML other m 2020-08-26T10:16:07.14
TDMT - Time Domain Moment Tensor
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