Earthquake with magnitude of ML 1.9 on date 27-09-2021 and time 00:33:31 (UTC) in region 3 km W Davagna (GE)

A magnitude ML 1.9 earthquake occured in region: 3 km W Davagna (GE), on

  • 27-09-2021 00:33:31 (UTC)
  • 27-09-2021 02:33:31 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.473, 9.056 at 9 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

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
Davagna GE 3 1884 1884
Bargagli GE 4 2708 4592
Montoggio GE 5 2067 6659
Sant'Olcese GE 7 5906 12565
Lumarzo GE 7 1535 14100
Casella GE 8 3144 17244
Valbrevenna GE 9 798 18042
Torriglia GE 10 2311 20353
Serra Riccò GE 10 7885 28238
Bogliasco GE 11 4488 32726
Uscio GE 11 2284 35010
Neirone GE 11 916 35926
Pieve Ligure GE 11 2544 38470
Savignone GE 12 3205 41675
Sori GE 12 4205 45880
Genova GE 12 586655 632535
Mignanego GE 13 3675 636210
Tribogna GE 13 614 636824
Crocefieschi GE 13 548 637372
Avegno GE 13 2525 639897
Ceranesi GE 13 3875 643772
Campomorone GE 13 6996 650768
Moconesi GE 14 2614 653382
Busalla GE 14 5563 658945
Recco GE 14 9752 668697
Vobbia GE 14 409 669106
Propata GE 15 142 669248
Cicagna GE 16 2502 671750
Camogli GE 16 5378 677128
Favale di Malvaro GE 16 466 677594
Rondanina GE 16 62 677656
Montebruno GE 17 240 677896
Ronco Scrivia GE 17 4417 682313
Fascia GE 18 81 682394
Lorsica GE 18 468 682862
Mongiardino Ligure AL 19 165 683027
Orero GE 19 565 683592
Carrega Ligure AL 19 84 683676
Coreglia Ligure GE 19 285 683961
Fraconalto AL 19 336 684297
Rapallo GE 20 29796 714093
Santa Margherita Ligure GE 20 9338 723431

Municipalities with at least 50000 inhabitants

An earthquake occurred to
12 Km NE of Genova (586655 inhabitants)
49 Km E of Savona (61345 inhabitants)
60 Km SE of Alessandria (93943 inhabitants)
74 Km NW of La Spezia (93959 inhabitants)
80 Km S of Pavia (72576 inhabitants)
82 Km SW of Piacenza (102191 inhabitants)
82 Km SE of Asti (76202 inhabitants)
94 Km W of Carrara (63133 inhabitants)
95 Km S of Vigevano (63310 inhabitants)
99 Km W of Massa (69479 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Preliminary map of the earthquake effects from the web questionnaire

Preliminary map of the earthquake effects from the web questionnaire

This map shows the distribution of the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire (http://www.haisentitoilterremoto.it/) that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100
ML 1.9 2021-09-27
00:33:31
44.473 9.0557 9 2021-09-27
00:42:30
Sala Sismica INGV-Roma 95923721
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-27 00:33:31 ± 0.11
Latitude 44.4730 ± 0.0081
Longitude 9.0557 ± 0.0076
Depth (km) 9 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 95923721

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 846
Semi-minor axis of confidence ellipse (meter) 554
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 181
Circular confidence region, given by single value of horizontal uncertainty (meter) 850
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 96
Number of associated phases, regardless of their use for origin computation 35
Number of defining phases 28
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.34
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 1.1952
Number of stations at which the event was observed 20
Number of stations from which data was used for origin computation 14
Magnitude information

ML:1.9

Field Value
Value 1.9
Uncertainty 0.3
Num. used stations 16
Type of magnitude ML
Reference to an origin 95923721
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-27 00:42:30
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IX.PGN3.HHZ.02 2021-09-27T00:34:53.02 3.0 undecidable manual Pn 3.85 0
IV.CPGN.EHZ. 2021-09-27T00:34:19.86 3.0 undecidable manual Sn -0.56 0
GU.ENR.HHZ. 2021-09-27T00:34:10.04 0.6 undecidable manual S 259 1.1952 50 -0.05 40
IV.CSP1.EHZ. 2021-09-27T00:34:07.23 3.0 undecidable manual Pn 0.93 0
GU.GBOS.HHZ. 2021-09-27T00:34:01.90 0.6 undecidable manual S 256 0.8993 50 0.59 37
GU.RORO.HHZ. 2021-09-27T00:33:58.39 0.6 undecidable manual S 243 0.7941 50 0.19 42
IV.PLMA.HHZ. 2021-09-27T00:33:55.22 0.6 undecidable manual S 126 0.7105 50 -0.51 40
IV.CPGN.EHZ. 2021-09-27T00:33:54.97 3.0 undecidable manual Pg 1.38 0
GU.ENR.HHZ. 2021-09-27T00:33:54.29 0.6 undecidable manual P 259 1.1952 50 0.37 37
GU.CANO.HHZ. 2021-09-27T00:33:54.16 0.6 undecidable manual S 246 0.6421 50 0.45 41
GU.ROTM.HHZ. 2021-09-27T00:33:53.78 0.6 undecidable manual S 307 0.6259 50 0.57 40
IV.QLNO.HHZ. 2021-09-27T00:33:50.18 0.6 undecidable manual S 254 0.5279 50 -0.14 45
GU.POPM.HHZ. 2021-09-27T00:33:49.08 3.0 undecidable manual S -3.88 0
GU.GBOS.HHZ. 2021-09-27T00:33:48.97 0.6 undecidable manual P 256 0.8993 50 0.12 42
GU.RORO.HHZ. 2021-09-27T00:33:47.71 0.6 negative manual P 243 0.7941 50 0.66 37
IV.BOB.HHE. 2021-09-27T00:33:46.75 0.6 undecidable manual S 43 0.4056 50 0.05 47
IV.PLMA.HHZ. 2021-09-27T00:33:46.24 0.3 undecidable manual P 126 0.7105 50 0.61 58
IV.SARZ.HHE. 2021-09-27T00:33:46.11 0.6 undecidable manual S 346 0.4065 50 -0.62 41
GU.PCP.HHZ. 2021-09-27T00:33:44.80 0.3 undecidable manual S 281 0.3696 50 -0.84 57
GU.CANO.HHZ. 2021-09-27T00:33:44.43 0.6 undecidable manual P 246 0.6421 50 -0.03 45
IV.MSSA.HHZ. 2021-09-27T00:33:44.96 0.3 undecidable manual S 115 0.3651 50 -0.53 64
GU.ROTM.HHZ. 2021-09-27T00:33:44.52 0.6 undecidable manual P 307 0.6259 50 0.34 42
IV.QLNO.HHZ. 2021-09-27T00:33:42.07 0.3 negative manual P 254 0.5279 50 -0.44 64
IV.SARZ.HHE. 2021-09-27T00:33:41.15 0.1 undecidable manual P 346 0.4065 50 0.72 79
IV.BOB.HHE. 2021-09-27T00:33:40.54 0.1 undecidable manual P 43 0.4056 50 0.12 93
GU.PCP.HHZ. 2021-09-27T00:33:39.10 0.1 negative manual P 281 0.3696 50 -0.7 80
IV.MSSA.HHZ. 2021-09-27T00:33:39.64 0.3 undecidable manual P 115 0.3651 50 -0.08 71
GU.GENL.EHZ. 2021-09-27T00:33:36.80 0.3 undecidable manual S 222 0.0908 133 0.2 73
IT.GNV.HGZ. 2021-09-27T00:33:36.65 0.3 undecidable manual S 245 0.0971 131 -0.14 74
GU.RNCA.HHZ. 2021-09-27T00:33:35.71 0.3 undecidable manual S 269 0.0746 138 -0.45 70
GU.RNCA.HHZ. 2021-09-27T00:33:34.24 0.1 undecidable manual P 269 0.0746 138 -0.09 100
IT.GNV.HGZ. 2021-09-27T00:33:34.79 0.3 negative manual P 245 0.0971 131 0.1 75
GU.GENL.EHZ. 2021-09-27T00:33:34.79 0.1 positive manual P 222 0.0908 133 0.2 97
IV.ZEN8.EHZ. 2021-09-27T00:33:34.84 3.0 positive manual P -6.4 0
GU.GRAM.HHZ. 2021-09-27T00:33:27.40 3.0 undecidable manual S -1.97 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GU.RNCA.HHN. ML:2.2 0.00254 0.16 AML other m 2021-09-27T00:33:35.83
GU.RNCA.HHE. ML:2.2 0.002334257 0.12 AML other m 2021-09-27T00:33:35.83
GU.GENL.EHN. ML:2.1 0.001721154 0.14 AML other m 2021-09-27T00:33:36.92
GU.GENL.EHE. ML:2 0.001421797 0.16 AML other m 2021-09-27T00:33:37.43
IV.MSSA.HHN. ML:2.5 0.001195 0.1 AML other m 2021-09-27T00:33:45.35
GU.PCP.HHN. ML:1.2 6.195829E-5 0.14 AML other m 2021-09-27T00:33:45.48
IV.MSSA.HHE. ML:2.6 0.001335 0.1 AML other m 2021-09-27T00:33:45.72
GU.PCP.HHE. ML:1.2 4.9024755E-5 0.18 AML other m 2021-09-27T00:33:45.13
IV.QLNO.HHN. ML:1.3 4.005835E-5 0.18 AML other m 2021-09-27T00:33:51.81
IV.QLNO.HHE. ML:1.3 4.2235595E-5 0.18 AML other m 2021-09-27T00:33:52.84
GU.CANO.HHN. ML:2.1 0.0001845 0.44 AML other m 2021-09-27T00:33:54.82
GU.CANO.HHE. ML:2 0.0001535 0.36 AML other m 2021-09-27T00:33:56.30
IV.PLMA.HHE. ML:1.8 8.084381E-5 0.3 AML other m 2021-09-27T00:33:58.01
IV.PLMA.HHN. ML:1.9 0.000119 1.1 AML other m 2021-09-27T00:33:57.70
GU.GBOS.HHE. ML:1.5 2.87E-5 0.46 AML other m 2021-09-27T00:34:03.76
GU.GBOS.HHN. ML:1.6 3.885E-5 0.38 AML other m 2021-09-27T00:34:03.83
IV.CPGN.EHN. ML:2.7 7.6731E-5 0.96 AML other m 2021-09-27T00:34:42.68
IV.CPGN.EHE. ML:2.4 4.19701365E-5 0.84 AML other m 2021-09-27T00:34:03.38
GU.ROTM.HHE. ML:2 0.0001475263 0.56 AML other m 2021-09-27T00:34:00.31
GU.ROTM.HHN. ML:2 0.000188382395 0.52 AML other m 2021-09-27T00:34:03.05
GU.RORO.HHE. ML:2.3 0.0002203056 1.56 AML other m 2021-09-27T00:34:07.45
GU.RORO.HHN. ML:1.6 4.676673E-5 0.2 AML other m 2021-09-27T00:33:59.85
GU.ENR.HHE. ML:1.2 1.16865455E-5 0.36 AML other m 2021-09-27T00:33:56.22
GU.ENR.HHN. ML:1.4 1.61345125E-5 0.62 AML other m 2021-09-27T00:34:22.97
IV.CPGN.HNE. ML:3 0.0001739472 0.86 AML other m 2021-09-27T00:34:33.62
IV.CPGN.HNN. ML:3.1 0.00018155225 0.96 AML other m 2021-09-27T00:34:41.03
IV.CSP1.EHE. ML:3.1 0.000100427115 1.78 AML other m 2021-09-27T00:34:10.29
IV.CSP1.EHN. ML:3.2 0.00011183364 1.66 AML other m 2021-09-27T00:34:43.13
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