Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.0 on date 28-03-2023 and time 23:33:37 (UTC) in region 1 km W Dernice (AL)

A magnitude ML 2.0 earthquake occured in region: 1 km W Dernice (AL), on

  • 28-03-2023 23:33:37 (UTC)
  • 29-03-2023 01:33:37 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.7700, 9.0340 at 16 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
Dernice AL 1 185 185
Garbagna AL 3 696 881
San Sebastiano Curone AL 3 583 1464
Brignano-Frascata AL 5 456 1920
Cantalupo Ligure AL 6 527 2447
Montacuto AL 6 278 2725
Gremiasco AL 6 324 3049
Avolasca AL 7 294 3343
Casasco AL 7 129 3472
Rocchetta Ligure AL 7 200 3672
Momperone AL 8 223 3895
Borghetto di Borbera AL 8 1966 5861
Albera Ligure AL 8 325 6186
Castellania AL 9 90 6276
Sant'Agata Fossili AL 9 425 6701
Montemarzino AL 9 341 7042
Cecima PV 10 236 7278
Bagnaria PV 10 658 7936
Fabbrica Curone AL 10 656 8592
Grondona AL 10 510 9102
Montegioco AL 10 313 9415
Costa Vescovato AL 10 335 9750
Sardigliano AL 10 406 10156
Roccaforte Ligure AL 10 136 10292
Ponte Nizza PV 11 807 11099
Carezzano AL 11 431 11530
Cerreto Grue AL 11 323 11853
Gavazzana AL 12 180 12033
Cabella Ligure AL 12 528 12561
Pozzol Groppo AL 12 328 12889
Paderna AL 13 220 13109
Vignole Borbera AL 13 2182 15291
Monleale AL 13 566 15857
Cassano Spinola AL 13 1731 17588
Berzano di Tortona AL 14 157 17745
Stazzano AL 14 2486 20231
Volpedo AL 14 1227 21458
Varzi PV 14 3279 24737
Godiasco Salice Terme PV 14 3229 27966
Sarezzano AL 14 1171 29137
Mongiardino Ligure AL 15 165 29302
Villaromagnano AL 15 715 30017
Arquata Scrivia AL 15 6409 36426
Spineto Scrivia AL 15 337 36763
Serravalle Scrivia AL 15 6128 42891
Villalvernia AL 15 955 43846
Isola del Cantone GE 15 1540 45386
Volpeglino AL 15 148 45534
Carbonara Scrivia AL 16 1122 46656
Val di Nizza PV 16 624 47280
Santa Margherita di Staffora PV 16 473 47753
Casalnoceto AL 17 980 48733
Castellar Guidobono AL 17 399 49132
Rocca Susella PV 17 225 49357
Montesegale PV 17 298 49655
Viguzzolo AL 18 3148 52803
Rivanazzano Terme PV 18 5312 58115
Ronco Scrivia GE 19 4417 62532
Vobbia GE 19 409 62941
Valverde PV 19 287 63228
Novi Ligure AL 20 28154 91382
Tortona AL 20 27437 118819
Menconico PV 20 360 119179
Brallo di Pregola PV 20 599 119778
Retorbido PV 20 1538 121316

Municipalities with at least 50000 inhabitants

An earthquake occurred to
37 Km E of Alessandria (93943 inhabitants)
41 Km N of Genova (586655 inhabitants)
47 Km S of Pavia (72576 inhabitants)
61 Km SW of Piacenza (102191 inhabitants)
63 Km S of Vigevano (63310 inhabitants)
67 Km E of Asti (76202 inhabitants)
68 Km NE of Savona (61345 inhabitants)
79 Km S of Milano (1345851 inhabitants)
82 Km SE of Novara (104380 inhabitants)
85 Km S of Rho (50434 inhabitants)
87 Km S of Sesto San Giovanni (81608 inhabitants)
88 Km W of Cremona (71901 inhabitants)
89 Km S of Cinisello Balsamo (75078 inhabitants)
92 Km S of Legnano (60262 inhabitants)
93 Km S of Monza (122671 inhabitants)
95 Km S of Busto Arsizio (83106 inhabitants)
97 Km NW of La Spezia (93959 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 2.0 2023-03-28
23:33:37		 44.7702 9.0343 16 2024-03-01
17:18:01		 Bollettino Sismico Italiano INGV 115860011
Reviewed
Rev100 		ML 2.0 2023-03-28
23:33:37		 44.7617 9.0477 10 2023-03-28
23:44:36		 Sala Sismica INGV-Roma 115833701
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-03-28 23:33:37 ± 0.1
Latitude 44.7702 ± 0.0072
Longitude 9.0343 ± 0.0101
Depth (km) 16 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 115860011

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 800
Semi-minor axis of confidence ellipse (meter) 129
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 192
Circular confidence region, given by single value of horizontal uncertainty (meter) 800.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 55
Number of associated phases, regardless of their use for origin computation 40
Number of defining phases 40
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) 0.12950
Epicentral distance of station farthest from the epicenter (degree) 1.73659
Number of stations at which the event was observed 33
Number of stations from which data was used for origin computation 33
Magnitudes information

ML:2.0

Field Value
Value 2.0
Uncertainty 0.3
Num. used stations 36
Type of magnitude ML
Reference to an origin 115860011
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2023-12-28 14:39:43

ML:2.0

Field Value
Value 2.0
Uncertainty 0.3
Num. used stations 18
Type of magnitude ML
Reference to an origin 115833701
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-03-28 23:44:36
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
4P.IT02A.HHN. 2023-03-28T23:34:08.58 0.6 undecidable manual S 331 108.2139 93 -0.13 46
IV.MRGE.HHZ. 2023-03-28T23:34:06.54 0.6 undecidable manual P 306 189.7656 54 -0.63 30
CH.DIX.HHZ. 2023-03-28T23:34:06.31 0.6 undecidable manual P 320 192.7626 54 -1.22 23
IV.MAGA.HHZ. 2023-03-28T23:34:04.46 0.3 undecidable manual P 48 167.1105 54 0.12 58
4P.IT05A.HHZ. 2023-03-28T23:34:02.46 0.3 undecidable manual P 22 152.5362 92 0.18 62
GU.PZZ.HHZ. 2023-03-28T23:34:02.06 0.3 undecidable manual P 260 154.2345 92 -0.47 57
GU.STV.HHZ. 2023-03-28T23:34:02.14 0.3 undecidable manual P 247 147.1416 92 0.7 54
GU.SATI.HHZ. 2023-03-28T23:34:01.67 0.3 undecidable manual P 324 152.6361 92 -0.62 55
GU.ENR.HHZ. 2023-03-28T23:34:00.96 0.6 undecidable manual P 245 141.2475 92 0.43 40
GU.CIRO.HHZ. 2023-03-28T23:34:00.92 0.3 undecidable manual P 309 147.1416 92 -0.52 58
4P.IT01A.HHE. 2023-03-28T23:34:00.10 0.6 undecidable manual S 343 70.6737 94 1.38 31
GU.BHB.HHZ. 2023-03-28T23:33:59.55 0.6 undecidable manual P 274 139.6602 92 -0.74 36
CH.MUGIO.HHN. 2023-03-28T23:33:58.09 0.3 undecidable manual P 0 127.7721 92 -0.36 62
IV.MDI.HHE. 2023-03-28T23:33:57.95 0.3 undecidable manual P 25 122.988 92 0.23 65
IV.VARE.HHZ. 2023-03-28T23:33:57.65 0.3 undecidable manual P 350 123.4875 92 -0.15 66
GU.TRAV.HHZ. 2023-03-28T23:33:57.77 0.3 undecidable manual P 310 130.1697 92 -1.05 48
GU.EQUI.HHZ. 2023-03-28T23:33:56.35 0.3 undecidable manual P 127 111.0999 93 0.47 64
4P.IT02A.HHN. 2023-03-28T23:33:55.47 0.1 undecidable manual P 331 108.2139 93 0.02 94
IV.MONC.HHZ. 2023-03-28T23:33:55.37 0.3 undecidable manual P 292 93.24 93 2.22 23
GU.RORO.HHZ. 2023-03-28T23:33:55.22 0.6 undecidable manual P 227 105.8163 93 0.14 46
4P.IT03A.HHE. 2023-03-28T23:33:52.76 0.6 undecidable manual P 312 78.1662 94 1.93 21
GU.CANO.HHZ. 2023-03-28T23:33:52.58 0.3 undecidable manual P 226 88.7445 93 0.13 71
GU.PCP.HHZ. 2023-03-28T23:33:52.40 0.3 undecidable manual S 237 46.2204 98 0.2 76
GU.GRAM.HHZ. 2023-03-28T23:33:52.34 0.6 undecidable manual P 111 87.0462 93 0.15 48
IV.CTL8.HNZ. 2023-03-28T23:33:51.17 0.3 undecidable manual P 45 80.0643 94 0.06 74
4P.IT01A.HHE. 2023-03-28T23:33:50.26 0.3 undecidable manual P 343 70.6737 94 0.58 67
IV.QLNO.HHZ. 2023-03-28T23:33:49.47 0.6 undecidable manual P 228 73.5708 94 -0.65 43
GU.RNCA.HHZ. 2023-03-28T23:33:49.40 0.6 undecidable manual S 191 33.8439 102 0.45 49
IV.PCN.EHZ. 2023-03-28T23:33:48.87 0.3 undecidable manual P 61 61.6938 95 0.57 68
IV.BOB.HHZ. 2023-03-28T23:33:48.57 0.3 undecidable manual S 90 32.5452 103 -0.05 80
GU.GORR.HHZ. 2023-03-28T23:33:47.18 0.3 undecidable manual S 132 27.2505 107 -0.06 81
GU.ROTM.HHZ. 2023-03-28T23:33:47.81 0.3 undecidable manual P 280 54.4011 96 0.64 67
4P.IT04A.HHN. 2023-03-28T23:33:46.59 0.3 undecidable manual P 34 49.1175 97 0.23 76
GU.GENL.EHN. 2023-03-28T23:33:45.68 0.6 undecidable manual P 187 40.7259 99 0.59 46
GU.PCP.HHZ. 2023-03-28T23:33:45.51 0.1 undecidable manual P 237 46.2204 98 -0.41 97
IV.SARZ.HHZ. 2023-03-28T23:33:44.26 0.3 undecidable manual S 319 14.3745 128 0.1 82
GU.RNCA.HHZ. 2023-03-28T23:33:43.92 0.3 undecidable manual P 191 33.8439 102 -0.12 79
IV.BOB.HHZ. 2023-03-28T23:33:43.27 0.3 undecidable manual P 90 32.5452 103 -0.58 71
GU.GORR.HHZ. 2023-03-28T23:33:42.50 0.1 undecidable manual P 132 27.2505 107 -0.56 96
IV.SARZ.HHZ. 2023-03-28T23:33:40.75 0.1 negative manual P 319 14.3745 128 -0.52 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SARZ.HHE. ML:2.5 0.00226 1.28 AML other m 2023-03-28T23:33:44.97
IV.SARZ.HNE. ML:2.4 0.002225 1.28 AML other m 2023-03-28T23:33:44.97
IV.SARZ.HHN. ML:2.4 0.0018700000000000001 1.14 AML other m 2023-03-28T23:33:45.05
IV.SARZ.HNN. ML:2.4 0.0018199999999999998 0.82 AML other m 2023-03-28T23:33:46.34
GU.GORR.HHE. ML:2.0 0.000558 0.8 AML other m 2023-03-28T23:33:47.02
GU.GORR.HHN. ML:2.2 0.000815 0.34 AML other m 2023-03-28T23:33:47.55
IV.BOB.HHE. ML:1.9 0.0003185 0.54 AML other m 2023-03-28T23:33:49.89
IV.BOB.HHN. ML:2.0 0.0004165 0.52 AML other m 2023-03-28T23:33:50.45
GU.RNCA.HHN. ML:1.5 0.000122 0.94 AML other m 2023-03-28T23:33:51.69
GU.RNCA.HHE. ML:1.6 0.00017400000000000003 0.88 AML other m 2023-03-28T23:33:52.39
GU.PCP.HHN. ML:1.6 0.00011365 0.8 AML other m 2023-03-28T23:33:52.77
GU.PCP.HHE. ML:1.4 0.0000737 0.72 AML other m 2023-03-28T23:33:53.72
GU.ROTM.HHN. ML:2.3 0.0004755 0.36 AML other m 2023-03-28T23:34:05.18
IV.QLNO.HHN. ML:1.5 0.00004385 0.92 AML other m 2023-03-28T23:34:06.52
IV.QLNO.HHE. ML:1.5 0.00004435 0.82 AML other m 2023-03-28T23:34:06.51
GU.ROTM.HHE. ML:2.2 0.00032 0.38 AML other m 2023-03-28T23:34:12.32
GU.EQUI.HHE. ML:1.7 0.000039800000000000005 0.22 AML other m 2023-03-28T23:34:12.88
GU.EQUI.HHN. ML:1.8 0.000051699999999999996 0.64 AML other m 2023-03-28T23:34:13.59
GU.RORO.HHN. ML:1.6 0.00003265 1.54 AML other m 2023-03-28T23:34:14.96
GU.RORO.HHE. ML:1.6 0.0000359 0.42 AML other m 2023-03-28T23:34:14.22
IV.MONC.HHE. ML:2.3 0.00020999999999999998 0.32 AML other m 2023-03-28T23:34:15.14
GU.TRAV.HHE. ML:2.4 0.00017005 1.58 AML other m 2023-03-28T23:34:16.18
IV.MONC.HHN. ML:2.0 0.00012009999999999999 0.68 AML other m 2023-03-28T23:34:16.83
GU.TRAV.HHN. ML:2.3 0.0001265 0.22 AML other m 2023-03-28T23:34:17.11
GU.CIRO.HHN. ML:2.3 0.00009894999999999999 1.82 AML other m 2023-03-28T23:34:19.97
GU.CIRO.HHE. ML:2.1 0.00006819999999999999 0.56 AML other m 2023-03-28T23:34:20.56
GU.PZZ.HHN. ML:1.9 0.00004215 0.54 AML other m 2023-03-28T23:34:21.27
GU.ENR.HHE. ML:1.8 0.00003825 0.84 AML other m 2023-03-28T23:34:22.12
GU.ENR.HHN. ML:2.0 0.00005 0.68 AML other m 2023-03-28T23:34:22.97
GU.STV.HHN. ML:1.7 0.000025550000000000004 0.6 AML other m 2023-03-28T23:34:23.54
GU.STV.HHE. ML:1.8 0.00003295 1.52 AML other m 2023-03-28T23:34:23.17
GU.PZZ.HHE. ML:1.9 0.00004235 0.72 AML other m 2023-03-28T23:34:29.66
IV.MAGA.HHE. ML:2.4 0.00010499999999999999 0.84 AML other m 2023-03-28T23:34:29.02
IV.MAGA.HHN. ML:2.2 0.00006950000000000001 0.5 AML other m 2023-03-28T23:34:30.43
CH.DIX.HHN. ML:2.5 0.0001083 0.52 AML other m 2023-03-28T23:34:34.69
CH.DIX.HHE. ML:2.4 0.0000811 1.22 AML other m 2023-03-28T23:34:36.74
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