Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.9 on date 21-10-2013 and time 21:26:24 (Italy) in region 1 km N Garbagna (AL)

A magnitude ML 1.9 earthquake occured in region: 1 km N Garbagna (AL), on

  • 21-10-2013 19:26:24 (UTC)
  • 21-10-2013 21:26:24 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.7910, 9.0010 at 26 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
Garbagna AL 1 696 696
Avolasca AL 3 294 990
Brignano-Frascata AL 4 456 1446
Casasco AL 4 129 1575
Dernice AL 5 185 1760
San Sebastiano Curone AL 5 583 2343
Castellania AL 6 90 2433
Momperone AL 6 223 2656
Montegioco AL 6 313 2969
Costa Vescovato AL 6 335 3304
Sant'Agata Fossili AL 6 425 3729
Montemarzino AL 7 341 4070
Borghetto di Borbera AL 8 1966 6036
Cerreto Grue AL 8 323 6359
Carezzano AL 8 431 6790
Sardigliano AL 8 406 7196
Gremiasco AL 8 324 7520
Cantalupo Ligure AL 9 527 8047
Montacuto AL 9 278 8325
Gavazzana AL 9 180 8505
Cecima PV 9 236 8741
Paderna AL 9 220 8961
Pozzol Groppo AL 10 328 9289
Rocchetta Ligure AL 10 200 9489
Ponte Nizza PV 10 807 10296
Berzano di Tortona AL 10 157 10453
Bagnaria PV 11 658 11111
Grondona AL 11 510 11621
Monleale AL 11 566 12187
Sarezzano AL 11 1171 13358
Cassano Spinola AL 11 1731 15089
Volpedo AL 11 1227 16316
Villaromagnano AL 11 715 17031
Albera Ligure AL 11 325 17356
Spineto Scrivia AL 11 337 17693
Villalvernia AL 12 955 18648
Volpeglino AL 12 148 18796
Carbonara Scrivia AL 12 1122 19918
Stazzano AL 13 2486 22404
Vignole Borbera AL 13 2182 24586
Roccaforte Ligure AL 13 136 24722
Fabbrica Curone AL 13 656 25378
Godiasco Salice Terme PV 13 3229 28607
Serravalle Scrivia AL 14 6128 34735
Castellar Guidobono AL 14 399 35134
Casalnoceto AL 14 980 36114
Viguzzolo AL 14 3148 39262
Arquata Scrivia AL 15 6409 45671
Cabella Ligure AL 15 528 46199
Rocca Susella PV 16 225 46424
Rivanazzano Terme PV 16 5312 51736
Varzi PV 16 3279 55015
Tortona AL 16 27437 82452
Montesegale PV 16 298 82750
Isola del Cantone GE 16 1540 84290
Val di Nizza PV 17 624 84914
Novi Ligure AL 17 28154 113068
Pozzolo Formigaro AL 17 4775 117843
Mongiardino Ligure AL 18 165 118008
Retorbido PV 18 1538 119546
Santa Margherita di Staffora PV 19 473 120019
Gavi AL 19 4614 124633
Tassarolo AL 20 672 125305
Pontecurone AL 20 3723 129028
Carrosio AL 20 510 129538
Codevilla PV 20 997 130535

Municipalities with at least 50000 inhabitants

An earthquake occurred to
33 Km E of Alessandria (93943 inhabitants)
42 Km N of Genova (586655 inhabitants)
46 Km S of Pavia (72576 inhabitants)
60 Km S of Vigevano (63310 inhabitants)
62 Km W of Piacenza (102191 inhabitants)
64 Km E of Asti (76202 inhabitants)
68 Km NE of Savona (61345 inhabitants)
77 Km S of Milano (1345851 inhabitants)
79 Km SE of Novara (104380 inhabitants)
82 Km S of Rho (50434 inhabitants)
85 Km S of Sesto San Giovanni (81608 inhabitants)
87 Km S of Cinisello Balsamo (75078 inhabitants)
89 Km W of Cremona (71901 inhabitants)
90 Km S of Legnano (60262 inhabitants)
91 Km S of Monza (122671 inhabitants)
93 Km S of Busto Arsizio (83106 inhabitants)
98 Km S of Gallarate (53343 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 1.9 2013-10-21
19:26:24		 44.7907 9.0008 26 2015-01-20
11:29:30		 Bollettino Sismico Italiano INGV 5457521
Reviewed
Rev100 		ML 1.9 2013-10-21
19:26:24		 44.7757 9.0215 28 2014-10-21
12:08:56		 Sala Sismica INGV-Roma 4711161
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2013-10-21 19:26:24 ± 0.12
Latitude 44.7907 ± 0.0144
Longitude 9.0008 ± 0.0101
Depth (km) 26 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 5457521

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1405
Semi-minor axis of confidence ellipse (meter) 968
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 167
Circular confidence region, given by single value of horizontal uncertainty (meter) 1400.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 83
Number of associated phases, regardless of their use for origin computation 26
Number of defining phases 26
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.41
Epicentral distance of station closest to the epicenter (degree) 0.27699
Epicentral distance of station farthest from the epicenter (degree) 1.29412
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:1.9

Field Value
Value 1.9
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 5457521
Agency INGV
Autore Manually reviewed by Franco Mele
Time of creation (UTC) 2015-01-15 13:06:47

ML:1.9

Field Value
Value 1.9
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 4711161
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2013-10-21 19:54:35
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
GU.RSP.HHZ. 2013-10-21T19:27:03.90 0.6 undecidable manual S 287 141.8469 54 -0.37 38
GU.BHB.HHZ. 2013-10-21T19:27:03.20 0.6 undecidable manual S 273 136.863 54 0.02 42
GU.TRAV.HHZ. 2013-10-21T19:27:01.10 0.6 undecidable manual S 310 126.6732 54 0.12 43
CH.MUGIO.HHZ. 2013-10-21T19:27:00.30 0.6 undecidable manual S 1 125.4744 97 -0.44 39
GU.EQUI.HHZ. 2013-10-21T19:26:58.40 0.3 undecidable manual S 127 114.4965 98 0.56 57
IV.DOI.HHZ. 2013-10-21T19:26:48.21 0.1 undecidable manual P 258 142.0467 54 0.72 70
GU.CIRO.HHZ. 2013-10-21T19:26:47.21 0.1 undecidable manual P 309 143.6451 54 -0.48 74
GU.BHB.HHZ. 2013-10-21T19:26:46.66 0.1 undecidable manual P 273 136.863 54 -0.19 81
CH.MUGIO.HHZ. 2013-10-21T19:26:46.00 0.1 undecidable manual P 1 125.4744 97 0.57 77
GU.RSP.HHZ. 2013-10-21T19:26:46.95 0.3 undecidable manual P 287 141.8469 54 -0.52 55
IV.MDI.HHZ. 2013-10-21T19:26:45.84 0.6 undecidable manual P 27 122.0889 98 0.93 33
IV.MSSA.HHZ. 2013-10-21T19:26:44.70 0.6 undecidable manual S 142 66.5778 105 -0.58 44
GU.TRAV.HHZ. 2013-10-21T19:26:44.98 0.1 undecidable manual P 310 126.6732 54 -0.6 74
GU.EQUI.HHZ. 2013-10-21T19:26:44.23 0.1 undecidable manual P 127 114.4965 98 0.47 80
GU.GBOS.HHZ. 2013-10-21T19:26:44.01 0.1 undecidable manual P 237 110.2119 99 0.92 68
GU.ROTM.HHZ. 2013-10-21T19:26:42.13 0.6 undecidable manual S 277 51.4152 110 0.72 43
GU.GRAM.HHZ. 2013-10-21T19:26:40.31 0.3 negative manual P 111 90.3429 101 0.23 66
GU.PCP.HHZ. 2013-10-21T19:26:39.30 0.6 undecidable manual S 233 45.3213 113 -0.61 43
IV.BOB.HHZ. 2013-10-21T19:26:37.40 0.6 undecidable manual S 94 35.3424 120 -0.1 51
IV.QLNO.HHZ. 2013-10-21T19:26:37.49 0.3 undecidable manual P 225 73.1712 104 0 72
IV.MSSA.HHZ. 2013-10-21T19:26:36.30 0.3 undecidable manual P 142 66.5778 105 -0.21 71
GU.ROTM.HHZ. 2013-10-21T19:26:35.16 0.6 negative manual P 277 51.4152 110 0.88 39
GU.GORR.HHZ. 2013-10-21T19:26:35.80 0.6 undecidable manual S 131 30.747 124 -0.67 45
GU.PCP.HHZ. 2013-10-21T19:26:32.95 0.6 negative manual P 233 45.3213 113 -0.45 46
IV.BOB.HHZ. 2013-10-21T19:26:31.85 0.1 positive manual P 94 35.3424 120 -0.17 100
GU.GORR.HHZ. 2013-10-21T19:26:30.96 0.1 positive manual P 131 30.747 124 -0.46 95
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GU.BHB.HHN. ML:1.9 0.000049000000000000005 0.36 AML other m 2013-10-21T19:27:07.16
GU.BHB.HHE. ML:1.9 0.000050549999999999995 1.56 AML other m 2013-10-21T19:27:07.54
IV.BOB.HHE. ML:1.8 0.00020150000000000002 0.42 AML other m 2013-10-21T19:26:38.32
IV.BOB.HHN. ML:1.6 0.000142 0.94 AML other m 2013-10-21T19:26:40.32
GU.CIRO.HHN. ML:2.0 0.000051450000000000004 1.22 AML other m 2013-10-21T19:27:06.24
GU.CIRO.HHE. ML:1.9 0.0000447 0.28 AML other m 2013-10-21T19:27:06.51
IV.DOI.HHE. ML:2.0 0.000057249999999999996 1.54 AML other m 2013-10-21T19:26:49.97
IV.DOI.HHN. ML:2.0 0.00006085 0.74 AML other m 2013-10-21T19:27:10.21
GU.GBOS.HHN. ML:1.5 0.00002625 0.36 AML other m 2013-10-21T19:26:59.51
GU.GBOS.HHE. ML:1.4 0.00002205 1.58 AML other m 2013-10-21T19:26:47.66
GU.GORR.HHN. ML:2.0 0.00033899999999999995 0.92 AML other m 2013-10-21T19:26:37.11
GU.GORR.HHE. ML:2.2 0.0005949999999999999 0.26 AML other m 2013-10-21T19:26:36.63
GU.GRAM.HHN. ML:2.1 0.0001462 0.14 AML other m 2013-10-21T19:26:51.85
GU.GRAM.HHE. ML:2.0 0.00011005 0.84 AML other m 2013-10-21T19:26:52.03
GU.PCP.HHN. ML:1.5 0.00007855000000000001 0.82 AML other m 2013-10-21T19:26:40.34
GU.PCP.HHE. ML:1.6 0.0000929 1.3 AML other m 2013-10-21T19:26:41.23
GU.RSP.HHN. ML:1.8 0.000034149999999999997 0.98 AML other m 2013-10-21T19:27:06.24
GU.RSP.HHE. ML:1.7 0.00002685 1.12 AML other m 2013-10-21T19:27:10.54
GU.TRAV.HHE. ML:2.1 0.00009120000000000001 1.04 AML other m 2013-10-21T19:27:04.07
GU.TRAV.HHN. ML:2.2 0.00010735000000000001 1.36 AML other m 2013-10-21T19:27:02.86
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