Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.4 on date 02-09-2023 and time 00:49:35 (Italy) in region 5 km SE Ottone (PC)

A magnitude ML 1.4 earthquake occured in region: 5 km SE Ottone (PC), on

  • 01-09-2023 22:49:35 (UTC)
  • 02-09-2023 00:49:35 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.5920, 9.3780 at 10 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.

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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
Ottone PC 5 516 516
Gorreto GE 7 97 613
Rezzoaglio GE 7 995 1608
Fontanigorda GE 8 277 1885
Santo Stefano d'Aveto GE 8 1126 3011
Rovegno GE 8 554 3565
Cerignale PC 10 127 3692
Zerba PC 11 77 3769
Ferriere PC 11 1294 5063
Fascia GE 12 81 5144
Montebruno GE 12 240 5384
Rondanina GE 13 62 5446
Corte Brugnatella PC 14 586 6032
Propata GE 16 142 6174
Carrega Ligure AL 16 84 6258
Coli PC 17 879 7137
Brallo di Pregola PV 18 599 7736
Favale di Malvaro GE 18 466 8202
Borzonasca GE 19 2049 10251
Torriglia GE 19 2311 12562
Lorsica GE 20 468 13030
Bobbio PC 20 3577 16607

Municipalities with at least 50000 inhabitants

An earthquake occurred to
41 Km E of Genova (586655 inhabitants)
57 Km SW of Piacenza (102191 inhabitants)
65 Km NW of La Spezia (93959 inhabitants)
68 Km S of Pavia (72576 inhabitants)
70 Km SE of Alessandria (93943 inhabitants)
78 Km E of Savona (61345 inhabitants)
79 Km W of Parma (192836 inhabitants)
79 Km SW of Cremona (71901 inhabitants)
81 Km NW of Carrara (63133 inhabitants)
87 Km NW of Massa (69479 inhabitants)
90 Km SE of Vigevano (63310 inhabitants)
98 Km S of Milano (1345851 inhabitants)
99 Km E of Asti (76202 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
Reviewed
Rev100 		ML 1.4 2023-09-01
22:49:35		 44.5923 9.3785 10 2023-09-01
22:56:41		 Sala Sismica INGV-Roma 120670771
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-09-01 22:49:35 ± 0.13
Latitude 44.5923 ± 0.0126
Longitude 9.3785 ± 0.0101
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 120670771

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1438
Semi-minor axis of confidence ellipse (meter) 654
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 346
Circular confidence region, given by single value of horizontal uncertainty (meter) 1440.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 125
Number of associated phases, regardless of their use for origin computation 12
Number of defining phases 11
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.29
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.63942
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 6
Magnitude information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.2
Num. used stations 5
Type of magnitude ML
Reference to an origin 120670771
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-09-01 22:56:41
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CSNT.HHZ. 2023-09-01T22:50:08.81 3.0 negative manual Pg 1.5 0
IV.PLMA.HHZ. 2023-09-01T22:49:56.80 1.0 undecidable manual S 148 70.9734 50 -0.07 22
GU.GRAM.HHZ. 2023-09-01T22:49:52.70 0.3 undecidable manual S 102 55.4001 50 0 69
4P.IT07A.HHE. 2023-09-01T22:49:51.30 0.6 undecidable manual S 49 47.7189 50 0.64 40
GU.RNCA.HHZ. 2023-09-01T22:49:47.90 0.3 undecidable manual S 248 36.3414 50 0.28 67
IV.PLMA.HHZ. 2023-09-01T22:49:47.72 0.3 undecidable manual P 148 70.9734 50 0.01 67
GU.PCP.HHZ. 2023-09-01T22:49:46.82 0.3 undecidable manual P 265 66.0894 50 -0.12 66
GU.GRAM.HHZ. 2023-09-01T22:49:45.54 0.3 undecidable manual P 102 55.4001 50 0.24 66
4P.IT07A.HHE. 2023-09-01T22:49:43.44 0.3 undecidable manual P 49 47.7189 50 -0.68 59
GU.RNCA.HHZ. 2023-09-01T22:49:42.07 0.3 undecidable manual P 248 36.3414 50 -0.29 67
GU.GORR.HHZ. 2023-09-01T22:49:39.60 0.6 undecidable manual S 284 6.993 145 0.21 48
GU.GORR.HHZ. 2023-09-01T22:49:37.61 0.1 undecidable manual P 284 6.993 145 0 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GU.GORR.HHN. ML:0.0 0.00044624645 0.1792 AML other m 2023-09-01T22:49:39.99
GU.GORR.HHE. ML:0.0 0.0005359711499999999 0.1408 AML other m 2023-09-01T22:49:40.03
GU.GRAM.HHN. ML:0.0 0.00004935000000000001 1.2 AML other m 2023-09-01T22:49:53.82
GU.GRAM.HHE. ML:0.0 0.000056149999999999996 0.4 AML other m 2023-09-01T22:49:53.51
GU.RNCA.HHE. ML:1.1 0.000045396975000000004 0.1024 AML other m 2023-09-01T22:49:48.68
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