Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.4 on date 26-08-2021 and time 19:16:43 (UTC) in region Casella (GE)

A magnitude ML 2.4 earthquake occured in region: Casella (GE), on

  • 26-08-2021 19:16:43 (UTC)
  • 26-08-2021 21:16:43 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.5370, 8.9980 at 10 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

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.

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Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Casella GE 0 3144 3144
Savignone GE 3 3205 6349
Montoggio GE 4 2067 8416
Busalla GE 6 5563 13979
Serra Riccò GE 6 7885 21864
Crocefieschi GE 6 548 22412
Valbrevenna GE 6 798 23210
Sant'Olcese GE 6 5906 29116
Mignanego GE 7 3675 32791
Vobbia GE 8 409 33200
Ronco Scrivia GE 9 4417 37617
Ceranesi GE 9 3875 41492
Campomorone GE 9 6996 48488
Davagna GE 11 1884 50372
Fraconalto AL 11 336 50708
Mongiardino Ligure AL 13 165 50873
Bargagli GE 13 2708 53581
Isola del Cantone GE 13 1540 55121
Torriglia GE 13 2311 57432
Genova GE 15 586655 644087
Lumarzo GE 15 1535 645622
Propata GE 15 142 645764
Voltaggio AL 15 738 646502
Roccaforte Ligure AL 16 136 646638
Carrega Ligure AL 17 84 646722
Cabella Ligure AL 17 528 647250
Rondanina GE 18 62 647312
Neirone GE 18 916 648228
Grondona AL 18 510 648738
Bogliasco GE 19 4488 653226
Carrosio AL 19 510 653736
Arquata Scrivia AL 19 6409 660145
Uscio GE 19 2284 662429
Albera Ligure AL 19 325 662754
Fascia GE 19 81 662835
Pieve Ligure GE 19 2544 665379
Rocchetta Ligure AL 19 200 665579

Municipalities with at least 50000 inhabitants

An earthquake occurred to
15 Km NE of Genova (586655 inhabitants)
48 Km NE of Savona (61345 inhabitants)
52 Km SE of Alessandria (93943 inhabitants)
73 Km S of Pavia (72576 inhabitants)
75 Km SE of Asti (76202 inhabitants)
79 Km SW of Piacenza (102191 inhabitants)
82 Km NW of La Spezia (93959 inhabitants)
88 Km S of Vigevano (63310 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 2.4 2021-08-26
19:16:43		 44.5373 8.9978 10 2021-12-29
11:12:52		 Bollettino Sismico Italiano INGV 97943521
Reviewed
Rev100 		ML 2.4 2021-08-26
19:16:43		 44.5477 9.0028 10 2021-08-26
19:28:17		 Sala Sismica INGV-Roma 94675881
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-08-26 19:16:43 ± 0.1
Latitude 44.5373 ± 0.0063
Longitude 8.9978 ± 0.0063
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 97943521

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 701
Semi-minor axis of confidence ellipse (meter) 270
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 170
Circular confidence region, given by single value of horizontal uncertainty (meter) 700.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 61
Number of associated phases, regardless of their use for origin computation 42
Number of defining phases 42
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) 0.07374
Epicentral distance of station farthest from the epicenter (degree) 1.52525
Number of stations at which the event was observed 25
Number of stations from which data was used for origin computation 25
Magnitudes information

ML:2.4

Field Value
Value 2.4
Uncertainty 0.2
Num. used stations 44
Type of magnitude ML
Reference to an origin 94675881
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-08-26 19:28:17

ML:2.4

Field Value
Value 2.4
Uncertainty 0.2
Num. used stations 44
Type of magnitude ML
Reference to an origin 97943521
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-11-29 14:28:20
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
GU.MAIM.HHZ. 2021-08-26T19:17:22.59 0.6 undecidable manual S 120 137.4624 50 -0.47 36
GU.ENR.HHZ. 2021-08-26T19:17:21.32 0.6 undecidable manual S 255 129.7701 50 0.3 38
GU.IMI.HHZ. 2021-08-26T19:17:16.37 0.6 undecidable manual S 232 111.999 50 0.09 41
IV.SALO.HNZ. 2021-08-26T19:17:13.35 0.3 undecidable manual P 44 169.2972 50 2.04 20
GU.GBOS.HHZ. 2021-08-26T19:17:12.58 0.6 undecidable manual S 251 97.4247 50 0.19 41
GU.EQUI.HHZ. 2021-08-26T19:17:12.92 0.6 undecidable manual S 114 100.4217 50 -0.27 40
IV.PLMA.HHZ. 2021-08-26T19:17:09.21 0.6 undecidable manual S 128 86.8464 50 -0.34 41
GU.POPM.HHZ. 2021-08-26T19:17:09.06 0.3 undecidable manual P 111 149.9388 50 0.74 47
GU.TRAV.HHZ. 2021-08-26T19:17:08.12 0.3 undecidable manual P 318 146.0427 50 0.4 53
IV.PII.HHZ. 2021-08-26T19:17:08.65 0.3 undecidable manual P 126 151.5372 50 0.08 56
GU.RSP.HHZ. 2021-08-26T19:17:08.46 0.3 undecidable manual P 297 152.2365 50 -0.21 54
GU.MAIM.HHZ. 2021-08-26T19:17:07.03 0.3 undecidable manual P 120 137.4624 50 0.64 50
GU.BHB.HHZ. 2021-08-26T19:17:06.93 0.3 undecidable manual P 284 140.748 50 0.02 58
GU.STV.HHZ. 2021-08-26T19:17:06.36 0.3 undecidable manual P 257 136.3635 50 0.12 58
GU.ENR.HHZ. 2021-08-26T19:17:05.20 0.3 undecidable manual P 255 129.7701 50 -0.01 60
GU.CANO.HHZ. 2021-08-26T19:17:04.80 0.6 undecidable manual S 239 70.5738 50 -0.41 41
GU.ROTM.HHZ. 2021-08-26T19:17:03.57 0.6 undecidable manual S 304 61.5939 50 0.77 37
GU.IMI.HHZ. 2021-08-26T19:17:02.79 0.3 undecidable manual P 232 111.999 50 0.31 58
IV.QLNO.HHZ. 2021-08-26T19:17:01.11 0.6 undecidable manual S 246 56.7987 50 -0.42 42
GU.EQUI.HHZ. 2021-08-26T19:17:01.20 0.3 undecidable manual P 114 100.4217 50 0.51 57
IV.PLMA.HHZ. 2021-08-26T19:16:59.11 0.3 undecidable manual P 128 86.8464 50 0.51 59
GU.GBOS.HHZ. 2021-08-26T19:16:59.76 0.3 undecidable manual P 251 97.4247 50 -0.48 58
IV.MSSA.HHZ. 2021-08-26T19:16:58.71 0.6 undecidable manual S 121 47.9187 50 -0.45 43
GU.GRAM.HHZ. 2021-08-26T19:16:58.56 0.3 undecidable manual P 93 84.5487 50 0.32 62
IV.BOB.HNE. 2021-08-26T19:16:58.05 0.6 undecidable manual S 54 43.7229 50 -0.01 47
IV.SARZ.HHZ. 2021-08-26T19:16:57.52 0.6 undecidable manual S 350 37.2294 50 1.22 31
GU.CANO.HHZ. 2021-08-26T19:16:55.69 0.3 undecidable manual P 239 70.5738 50 -0.4 62
GU.PCP.HHZ. 2021-08-26T19:16:55.32 0.6 undecidable manual S 271 35.742 50 -0.6 42
GU.ROTM.HHZ. 2021-08-26T19:16:54.65 0.3 undecidable manual P 304 61.5939 50 -0.05 68
IV.QLNO.HHZ. 2021-08-26T19:16:53.42 0.3 undecidable manual P 246 56.7987 50 -0.54 61
GU.GORR.HHZ. 2021-08-26T19:16:52.01 0.3 undecidable manual S 72 24.5532 112 -0.78 59
IV.MSSA.HHZ. 2021-08-26T19:16:52.55 0.3 undecidable manual P 121 47.9187 50 -0.05 70
IV.BOB.HNE. 2021-08-26T19:16:51.82 0.1 undecidable manual P 54 43.7229 50 -0.14 92
IV.SARZ.HHZ. 2021-08-26T19:16:51.02 0.3 undecidable manual P 350 37.2294 50 0.08 71
GU.GENL.EHZ. 2021-08-26T19:16:50.32 0.6 undecidable manual S 189 14.7741 123 0.55 44
IT.GNV.HGZ. 2021-08-26T19:16:49.75 0.6 undecidable manual S 204 12.7761 127 0.53 44
GU.PCP.HHZ. 2021-08-26T19:16:49.87 0.1 negative manual P 271 35.742 50 -0.86 75
GU.GORR.HHZ. 2021-08-26T19:16:48.24 0.1 negative manual P 72 24.5532 112 -0.68 82
GU.GENL.EHZ. 2021-08-26T19:16:47.35 0.1 positive manual P 189 14.7741 123 0.18 96
GU.RNCA.HHZ. 2021-08-26T19:16:47.99 0.6 undecidable manual S 207 8.1807 140 -0.06 50
GU.RNCA.HHZ. 2021-08-26T19:16:46.15 0.1 undecidable manual P 207 8.1807 140 -0.04 100
IT.GNV.HGZ. 2021-08-26T19:16:46.96 0.1 positive manual P 204 12.7761 127 0.11 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GU.GENL.EHN. ML:2.2 0.001615 0.2 AML other m 2021-08-26T19:16:47.79
GU.RNCA.HHE. ML:2.5 0.004625 0.66 AML other m 2021-08-26T19:16:48.41
GU.RNCA.HHN. ML:2.5 0.00418 1.22 AML other m 2021-08-26T19:16:49.66
GU.GENL.EHE. ML:2.2 0.001545 1.42 AML other m 2021-08-26T19:16:51.27
GU.GORR.HHN. ML:2.6 0.0026950000000000003 0.54 AML other m 2021-08-26T19:16:52.37
GU.GORR.HHE. ML:2.7 0.002875 0.56 AML other m 2021-08-26T19:16:53.16
GU.PCP.HHE. ML:2.1 0.000467 1.36 AML other m 2021-08-26T19:16:56.71
GU.PCP.HHN. ML:2.0 0.0003885 0.26 AML other m 2021-08-26T19:16:56.66
IV.SARZ.HHN. ML:2.8 0.0023 0.28 AML other m 2021-08-26T19:16:59.67
IV.MSSA.HHE. ML:2.8 0.0016099999999999999 1.08 AML other m 2021-08-26T19:16:59.20
IV.MSSA.HHN. ML:2.6 0.001175 1.72 AML other m 2021-08-26T19:16:59.13
IV.SARZ.HNN. ML:2.8 0.0022400000000000002 1.04 AML other m 2021-08-26T19:17:01.07
IV.SARZ.HHE. ML:2.9 0.0027249999999999996 0.5 AML other m 2021-08-26T19:17:01.15
IV.SARZ.HNE. ML:2.8 0.0026950000000000003 0.52 AML other m 2021-08-26T19:17:01.15
IV.QLNO.HHN. ML:2.3 0.00041349999999999997 0.44 AML other m 2021-08-26T19:17:04.82
IV.QLNO.HHE. ML:2.2 0.000366 0.5 AML other m 2021-08-26T19:17:05.49
GU.CANO.HHN. ML:2.7 0.0007769999999999999 0.84 AML other m 2021-08-26T19:17:07.55
GU.CANO.HHE. ML:2.5 0.00048699999999999997 0.66 AML other m 2021-08-26T19:17:10.33
IV.PLMA.HHN. ML:2.5 0.000381 0.2 AML other m 2021-08-26T19:17:11.61
IV.PLMA.HHE. ML:2.4 0.0002825 0.7 AML other m 2021-08-26T19:17:12.63
GU.ROTM.HHE. ML:2.7 0.001045 1.24 AML other m 2021-08-26T19:17:13.70
GU.GBOS.HHN. ML:2.3 0.00020750000000000003 0.38 AML other m 2021-08-26T19:17:15.44
GU.GRAM.HHN. ML:2.4 0.000334 0.24 AML other m 2021-08-26T19:17:15.33
GU.GRAM.HHE. ML:2.5 0.0003815 0.46 AML other m 2021-08-26T19:17:15.75
GU.EQUI.HHE. ML:2.2 0.0001675 0.68 AML other m 2021-08-26T19:17:16.35
GU.ROTM.HHN. ML:2.7 0.0010425 0.98 AML other m 2021-08-26T19:17:16.32
GU.EQUI.HHN. ML:2.4 0.00026949999999999994 0.34 AML other m 2021-08-26T19:17:16.35
GU.GBOS.HHE. ML:2.1 0.00011999999999999999 0.66 AML other m 2021-08-26T19:17:16.70
GU.IMI.HHE. ML:2.4 0.0002245 0.3 AML other m 2021-08-26T19:17:18.48
GU.IMI.HHN. ML:2.5 0.000266 1 AML other m 2021-08-26T19:17:20.21
GU.MAIM.HHE. ML:2.2 0.00009995 1.28 AML other m 2021-08-26T19:17:25.25
GU.MAIM.HHN. ML:2.5 0.000183 0.54 AML other m 2021-08-26T19:17:26.53
GU.STV.HHN. ML:2.0 0.00006745 0.26 AML other m 2021-08-26T19:17:26.81
GU.BHB.HHN. ML:2.1 0.00007125000000000001 0.66 AML other m 2021-08-26T19:17:28.41
GU.TRAV.HHE. ML:2.6 0.00020600000000000002 1.06 AML other m 2021-08-26T19:17:28.97
GU.STV.HHE. ML:2.0 0.0000576 0.6 AML other m 2021-08-26T19:17:28.89
IV.PII.HHE. ML:2.5 0.0001445 0.7 AML other m 2021-08-26T19:17:28.53
GU.TRAV.HHN. ML:2.5 0.000161 0.74 AML other m 2021-08-26T19:17:28.93
GU.POPM.HHE. ML:2.8 0.000317 0.36 AML other m 2021-08-26T19:17:29.56
GU.BHB.HNE. ML:2.2 0.0000916 1.06 AML other m 2021-08-26T19:17:29.35
GU.BHB.HHE. ML:2.2 0.00008560000000000001 1.02 AML other m 2021-08-26T19:17:29.37
IV.PII.HHN. ML:2.6 0.00018099999999999998 0.3 AML other m 2021-08-26T19:17:30.23
GU.POPM.HHN. ML:2.7 0.00026700000000000004 0.24 AML other m 2021-08-26T19:17:30.52
GU.BHB.HNN. ML:2.1 0.00007585 1.46 AML other m 2021-08-26T19:17:34.78
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
Waveforms Seismic signals in miniseed + resp format Download