Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.1 on date 27-07-2021 and time 20:18:47 (UTC) in region 1 km SW Rossiglione (GE)

A magnitude ML 2.1 earthquake occured in region: 1 km SW Rossiglione (GE), on

  • 27-07-2021 20:18:47 (UTC)
  • 27-07-2021 22:18:47 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.5540, 8.6610 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
Rossiglione GE 1 2779 2779
Campo Ligure GE 3 2955 5734
Tiglieto GE 4 546 6280
Masone GE 7 3679 9959
Belforte Monferrato AL 8 515 10474
Molare AL 9 2181 12655
Urbe SV 9 700 13355
Ovada AL 10 11477 24832
Tagliolo Monferrato AL 10 1581 26413
Cassinelle AL 10 914 27327
Lerma AL 10 869 28196
Casaleggio Boiro AL 11 372 28568
Cremolino AL 11 1086 29654
Mornese AL 12 737 30391
Prasco AL 13 521 30912
Morbello AL 13 402 31314
Rocca Grimalda AL 13 1512 32826
Trisobbio AL 14 655 33481
Mele GE 14 2725 36206
Montaldeo AL 14 265 36471
Carpeneto AL 15 977 37448
Silvano d'Orba AL 15 1988 39436
Bosio AL 15 1227 40663
Morsasco AL 15 679 41342
Castelletto d'Orba AL 15 2047 43389
Parodi Ligure AL 15 715 44104
Montaldo Bormida AL 16 664 44768
Sassello SV 16 1777 46545
Grognardo AL 16 259 46804
Voltaggio AL 16 738 47542
Ponzone AL 16 1051 48593
Arenzano GE 17 11519 60112
San Cristoforo AL 17 608 60720
Orsara Bormida AL 17 424 61144
Visone AL 17 1194 62338
Fraconalto AL 18 336 62674
Carrosio AL 18 510 63184
Cogoleto GE 18 9172 72356
Cavatore AL 19 291 72647
Gavi AL 19 4614 77261
Campomorone GE 19 6996 84257
Ceranesi GE 19 3875 88132
Strevi AL 20 2019 90151
Malvicino AL 20 85 90236
Cartosio AL 20 747 90983
Rivalta Bormida AL 20 1446 92429
Capriata d'Orba AL 20 1904 94333

Municipalities with at least 50000 inhabitants

An earthquake occurred to
27 Km NW of Genova (586655 inhabitants)
31 Km NE of Savona (61345 inhabitants)
40 Km S of Alessandria (93943 inhabitants)
53 Km SE of Asti (76202 inhabitants)
81 Km SW of Pavia (72576 inhabitants)
87 Km S of Vigevano (63310 inhabitants)
90 Km E of Cuneo (56081 inhabitants)
92 Km SE of Moncalieri (57294 inhabitants)
97 Km SE of Torino (890529 inhabitants)
99 Km SW of Piacenza (102191 inhabitants)
99 Km S of Novara (104380 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 2.1 2021-07-27
20:18:47		 44.5535 8.6608 10 2021-12-29
11:12:33		 Bollettino Sismico Italiano INGV 96026281
Reviewed
Rev100 		ML 2.2 2021-07-27
20:18:47		 44.5622 8.6653 10 2021-07-27
20:29:59		 Sala Sismica INGV-Roma 93280621
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-07-27 20:18:47 ± 0.07
Latitude 44.5535 ± 0.0045
Longitude 8.6608 ± 0.0038
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 96026281

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 490
Semi-minor axis of confidence ellipse (meter) 207
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 173
Circular confidence region, given by single value of horizontal uncertainty (meter) 490.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 49
Number of associated phases, regardless of their use for origin computation 46
Number of defining phases 45
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.26
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 2.13409
Number of stations at which the event was observed 36
Number of stations from which data was used for origin computation 35
Magnitudes information

ML:2.1

Field Value
Value 2.1
Uncertainty 0.2
Num. used stations 59
Type of magnitude ML
Reference to an origin 96026281
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-09-29 10:34:34

ML:2.2

Field Value
Value 2.2
Uncertainty 0.2
Num. used stations 59
Type of magnitude ML
Reference to an origin 93280621
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-07-27 20:29:59
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.APEC.HNZ. 2021-07-27T20:20:19.38 3.0 undecidable manual Sg 10.15 0
SI.LUSI.HHZ. 2021-07-27T20:19:23.80 0.6 undecidable manual P 48 236.8851 38 0.39 22
RD.ORIF.BHZ. 2021-07-27T20:19:22.20 0.6 undecidable manual P 281 222.8103 38 0.54 23
RD.PGF.BHZ. 2021-07-27T20:19:21.04 0.6 undecidable manual P 173 224.109 38 -0.78 21
ST.RONC.EHZ. 2021-07-27T20:19:21.70 0.6 undecidable manual P 43 220.2129 38 0.36 25
IV.SGAL.EHZ. 2021-07-27T20:19:15.12 0.6 undecidable manual P 48 171.0954 50 0.07 35
IV.VARE.HHN. 2021-07-27T20:19:11.67 0.6 undecidable manual P 3 146.0427 50 0.48 36
GU.RRL.HHZ. 2021-07-27T20:19:11.98 0.6 undecidable manual P 286 152.9358 50 -0.28 36
CH.MUGIO.HHN. 2021-07-27T20:19:11.91 0.6 undecidable manual P 11 154.623 50 -0.62 33
GU.CIRO.HHZ. 2021-07-27T20:19:10.12 0.3 undecidable manual P 324 144.4443 50 -0.82 47
GU.RORO.HHZ. 2021-07-27T20:19:08.00 0.3 undecidable manual S 224 67.9764 50 0 69
GU.EQUI.HHZ. 2021-07-27T20:19:08.11 0.6 undecidable manual P 109 125.874 50 0.02 41
IV.BOB.HHE. 2021-07-27T20:19:08.60 0.6 undecidable manual S 69 66.4779 50 0.98 34
GU.TRAV.HHZ. 2021-07-27T20:19:08.20 0.3 undecidable manual P 326 128.2716 50 -0.25 58
GU.RSP.HHZ. 2021-07-27T20:19:07.80 0.6 undecidable manual P 301 128.0718 50 -0.63 35
GU.BURY.HHZ. 2021-07-27T20:19:07.78 0.6 undecidable manual P 226 122.5884 50 0.2 40
GU.PZZ.HHZ. 2021-07-27T20:19:07.69 0.3 undecidable manual P 268 122.2887 50 0.15 60
GU.STV.HHZ. 2021-07-27T20:19:06.16 0.3 undecidable manual P 253 111.1998 50 0.34 59
GU.GRAM.HHZ. 2021-07-27T20:19:06.20 0.6 undecidable manual P 93 111.2997 50 0.37 39
GU.BHB.HHZ. 2021-07-27T20:19:06.17 0.3 undecidable manual P 286 114.5964 50 -0.17 61
IV.PLMA.HHZ. 2021-07-27T20:19:05.83 0.6 undecidable manual P 120 110.0121 50 0.2 41
FR.SAOF.HHZ.00 2021-07-27T20:19:05.73 0.6 undecidable manual P 235 108.2139 50 0.37 40
GU.ENR.HHZ. 2021-07-27T20:19:04.88 0.3 undecidable manual P 250 104.8173 50 0.04 64
GU.CANO.HHZ. 2021-07-27T20:19:03.80 0.6 undecidable manual S 221 51.0156 50 0.31 45
GU.IMI.HHZ. 2021-07-27T20:19:02.80 0.6 undecidable manual P 221 93.8394 50 -0.35 41
GU.MGRO.HHZ. 2021-07-27T20:19:02.38 0.3 undecidable manual P 230 88.245 50 0.09 66
GU.GORR.HHZ. 2021-07-27T20:19:02.80 0.3 undecidable manual S 83 50.3163 50 -0.49 65
IV.SARZ.HHE. 2021-07-27T20:19:01.10 0.6 undecidable manual S 30 40.1265 50 0.53 43
IV.MONC.HHZ. 2021-07-27T20:19:01.89 0.3 undecidable manual P 315 81.6516 50 0.62 58
GU.GBOS.HHZ. 2021-07-27T20:19:00.00 0.1 undecidable manual P 242 73.6707 50 -0.04 91
IV.MSSA.HHZ. 2021-07-27T20:19:00.06 0.3 undecidable manual P 111 72.7716 50 0.16 67
GU.RORO.HHZ. 2021-07-27T20:18:59.21 0.1 undecidable manual P 224 67.9764 50 0.05 92
IV.BOB.HHE. 2021-07-27T20:18:59.07 0.3 undecidable manual P 69 66.4779 50 0.14 68
IV.QLNO.HHZ. 2021-07-27T20:18:58.80 0.6 undecidable manual S 225 35.6421 50 -0.58 43
GU.GENL.EHZ. 2021-07-27T20:18:57.80 0.3 undecidable manual S 124 29.4483 50 0.07 73
IT.GNV.HGZ. 2021-07-27T20:18:56.30 0.3 undecidable manual S 122 25.3524 111 -0.18 72
GU.CANO.HHZ. 2021-07-27T20:18:56.44 0.3 undecidable manual P 221 51.0156 50 -0.11 70
GU.RNCA.HHZ. 2021-07-27T20:18:56.20 0.3 undecidable manual S 112 24.753 111 -0.06 74
GU.GORR.HHZ. 2021-07-27T20:18:55.84 0.3 undecidable manual P 83 50.3163 50 -0.59 62
IV.QLNO.HHZ. 2021-07-27T20:18:54.18 0.3 undecidable manual P 225 35.6421 50 0 74
IV.SARZ.HHE. 2021-07-27T20:18:54.32 0.3 undecidable manual P 30 40.1265 50 -0.55 65
GU.GENL.EHZ. 2021-07-27T20:18:53.31 0.3 undecidable manual P 124 29.4483 50 0.09 73
IT.GNV.HGZ. 2021-07-27T20:18:52.60 0.1 undecidable manual P 122 25.3524 111 0.1 98
GU.RNCA.HHZ. 2021-07-27T20:18:52.38 0.1 undecidable manual P 112 24.753 111 0 100
GU.PCP.HHZ. 2021-07-27T20:18:51.70 0.3 undecidable manual S 262 9.1797 136 0.03 77
GU.PCP.HHZ. 2021-07-27T20:18:49.90 0.3 undecidable manual P 262 9.1797 136 0.17 74
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GU.PCP.HHE. ML:2.6 0.0062352959999999995 0.0768 AML other m 2021-07-27T20:18:52.03
GU.RNCA.HHN. ML:2.3 0.0012850000000000001 0.26 AML other m 2021-07-27T20:18:56.84
GU.RNCA.HHE. ML:2.2 0.000992 0.22 AML other m 2021-07-27T20:18:57.06
GU.GENL.EHE. ML:2.4 0.0011322925000000002 0.1664 AML other m 2021-07-27T20:18:58.37
GU.GENL.EHN. ML:2.4 0.001207675 0.2176 AML other m 2021-07-27T20:18:58.69
IV.QLNO.HHE. ML:2.1 0.0005086105000000001 0.1152 AML other m 2021-07-27T20:18:59.91
IV.QLNO.HHN. ML:1.9 0.00031538489999999997 0.0512 AML other m 2021-07-27T20:19:00.11
GU.GORR.HHE. ML:2.0 0.0002595 0.32 AML other m 2021-07-27T20:19:04.41
GU.CANO.HHE. ML:2.3 0.0005591015500000001 0.2176 AML other m 2021-07-27T20:19:04.37
GU.CANO.HHN. ML:2.5 0.000824852 0.1664 AML other m 2021-07-27T20:19:04.39
GU.RORO.HHN. ML:2.0 0.00018344194999999998 0.128 AML other m 2021-07-27T20:19:08.67
GU.GORR.HHN. ML:2.0 0.0002615 0.46 AML other m 2021-07-27T20:19:09.66
GU.GBOS.HHN. ML:2.3 0.00033 0.34 AML other m 2021-07-27T20:19:09.32
GU.GBOS.HHE. ML:2.1 0.00018099999999999998 0.18 AML other m 2021-07-27T20:19:09.58
GU.RORO.HHE. ML:2.1 0.00022320625 1.7824 AML other m 2021-07-27T20:19:09.93
IV.MSSA.HHE. ML:2.5 0.000587 1.12 AML other m 2021-07-27T20:19:11.41
IV.MSSA.HHN. ML:2.3 0.000345 0.1 AML other m 2021-07-27T20:19:11.41
GU.MGRO.HHN. ML:2.0 0.00012244521 0.2432 AML other m 2021-07-27T20:19:15.61
IV.MONC.HHE. ML:2.3 0.00027659535000000004 0.3584 AML other m 2021-07-27T20:19:18.19
GU.ENR.HHN. ML:2.6 0.000380718 0.1408 AML other m 2021-07-27T20:19:19.09
GU.STV.HHN. ML:2.3 0.00016350000000000002 0.24 AML other m 2021-07-27T20:19:19.28
GU.MGRO.HNN. ML:2.1 0.00014486264999999997 0.6272 AML other m 2021-07-27T20:19:19.18
GU.ENR.HHE. ML:2.5 0.0002824406 0.1792 AML other m 2021-07-27T20:19:20.31
GU.MGRO.HHE. ML:2.1 0.00013762643 0.3584 AML other m 2021-07-27T20:19:20.66
GU.BHB.HHE. ML:2.2 0.00011446965000000001 0.1792 AML other m 2021-07-27T20:19:21.33
GU.BHB.HNE. ML:2.2 0.00011483643499999999 0.1664 AML other m 2021-07-27T20:19:21.32
GU.STV.HHE. ML:2.3 0.00015982059999999999 0.1152 AML other m 2021-07-27T20:19:21.36
GU.IMI.HHE. ML:2.0 0.000114062225 0.192 AML other m 2021-07-27T20:19:21.41
GU.IMI.HHN. ML:2.2 0.00018980865 0.3456 AML other m 2021-07-27T20:19:21.73
GU.BHB.HHN. ML:2.1 0.00009519039000000002 0.4608 AML other m 2021-07-27T20:19:22.44
GU.BHB.HNN. ML:2.1 0.00009340093499999998 1.7696 AML other m 2021-07-27T20:19:23.94
GU.GRAM.HHN. ML:2.1 0.00010475000000000001 0.36 AML other m 2021-07-27T20:19:23.45
GU.PZZ.HHN. ML:2.3 0.000141 0.68 AML other m 2021-07-27T20:19:23.16
IV.MONC.HHN. ML:2.3 0.0002685 1.62 AML other m 2021-07-27T20:19:24.11
FR.SAOF.HHN.00 ML:2.2 0.00015675689999999998 0.384 AML other m 2021-07-27T20:19:24.36
FR.SAOF.HHE.00 ML:2.1 0.00009778851999999999 1.5904 AML other m 2021-07-27T20:19:24.90
GU.RSP.HHN. ML:1.7 0.0000344 0.2 AML other m 2021-07-27T20:19:25.49
GU.PZZ.HHE. ML:2.4 0.000185 0.34 AML other m 2021-07-27T20:19:26.23
GU.EQUI.HHE. ML:1.7 0.000034643819999999997 0.2304 AML other m 2021-07-27T20:19:26.62
GU.EQUI.HHN. ML:1.6 0.000027049999999999997 1 AML other m 2021-07-27T20:19:28.44
GU.BURY.HNE. ML:2.3 0.00013991775000000002 0.3968 AML other m 2021-07-27T20:19:28.89
GU.BURY.HHN. ML:2.1 0.0001008 0.38 AML other m 2021-07-27T20:19:28.88
GU.GRAM.HHE. ML:2.0 0.00009183599 1.6672 AML other m 2021-07-27T20:19:28.16
GU.CIRO.HHE. ML:1.7 0.000030200000000000002 0.28 AML other m 2021-07-27T20:19:29.42
GU.BURY.HHE. ML:2.0 0.00007990977000000001 0.2688 AML other m 2021-07-27T20:19:29.63
GU.TRAV.HHN. ML:1.8 0.000047348124999999997 0.2048 AML other m 2021-07-27T20:19:30.46
GU.RSP.HNE. ML:1.6 0.000030150900000000003 0.3456 AML other m 2021-07-27T20:19:30.40
GU.RSP.HHE. ML:1.6 0.00002685 1.06 AML other m 2021-07-27T20:19:30.40
GU.TRAV.HHE. ML:1.8 0.00004718247 0.2176 AML other m 2021-07-27T20:19:30.48
GU.BURY.HNN. ML:2.1 0.000088729435 0.6272 AML other m 2021-07-27T20:19:32.64
GU.CIRO.HHN. ML:1.6 0.000020116805 0.2176 AML other m 2021-07-27T20:19:33.20
GU.RRL.HHN. ML:1.8 0.00002945 0.5 AML other m 2021-07-27T20:19:35.73
GU.RRL.HHE. ML:1.6 0.00002095 0.46 AML other m 2021-07-27T20:19:36.46
IV.SGAL.EHE. ML:2.2 0.00007075 0.34 AML other m 2021-07-27T20:19:40.34
IV.SGAL.EHN. ML:2.1 0.000055677435 0.3584 AML other m 2021-07-27T20:19:40.99
ST.RONC.EHE. ML:2.5 0.00008684826 1.6416 AML other m 2021-07-27T20:19:52.90
SI.LUSI.HHN. ML:2.4 0.00004892036 0.3968 AML other m 2021-07-27T20:19:57.44
ST.RONC.EHN. ML:2.6 0.00010614999999999999 0.54 AML other m 2021-07-27T20:19:57.47
SI.LUSI.HHE. ML:2.2 0.00003195 0.86 AML other m 2021-07-27T20:20:05.91
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