Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.6 on date 28-07-2023 and time 19:54:44 (Italy) in region 2 km SE Tornolo (PR)

A magnitude ML 1.6 earthquake occured in region: 2 km SE Tornolo (PR), on

  • 28-07-2023 17:54:44 (UTC)
  • 28-07-2023 19:54:44 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.4680, 9.6390 at 2 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
Tornolo PR 2 1010 1010
Compiano PR 4 1112 2122
Bedonia PR 4 3482 5604
Albareto PR 6 2156 7760
Varese Ligure SP 11 2059 9819
Borgo Val di Taro PR 11 6999 16818
Zeri MS 16 1094 17912
Maissana SP 17 616 18528
Santo Stefano d'Aveto GE 17 1126 19654
Sesta Godano SP 20 1377 21031
Bardi PR 20 2227 23258

Municipalities with at least 50000 inhabitants

An earthquake occurred to
43 Km NW of La Spezia (93959 inhabitants)
56 Km E of Genova (586655 inhabitants)
57 Km NW of Carrara (63133 inhabitants)
63 Km NW of Massa (69479 inhabitants)
65 Km S of Piacenza (102191 inhabitants)
66 Km SW of Parma (192836 inhabitants)
80 Km SW of Cremona (71901 inhabitants)
83 Km NW of Viareggio (62467 inhabitants)
83 Km W of Reggio nell'Emilia (171345 inhabitants)
88 Km SE of Pavia (72576 inhabitants)
94 Km E of Savona (61345 inhabitants)
95 Km SE of Alessandria (93943 inhabitants)
98 Km NW of Lucca (89046 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 1.6 2023-07-28
17:54:44		 44.4682 9.6387 3 2023-07-28
18:07:43		 Sala Sismica INGV-Roma 119661691
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-07-28 17:54:44 ± 0.14
Latitude 44.4682 ± 0.0117
Longitude 9.6387 ± 0.0101
Depth (km) 3 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 119661691

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1360
Semi-minor axis of confidence ellipse (meter) 620
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 25
Circular confidence region, given by single value of horizontal uncertainty (meter) 1360.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 146
Number of associated phases, regardless of their use for origin computation 17
Number of defining phases 13
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.35
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.82558
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 7
Magnitude information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 119661691
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-07-28 18:07:43
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.VARE.HHZ. 2023-07-28T17:55:34.18 3.0 undecidable manual S 0.18 0
IV.BDI.HHZ. 2023-07-28T17:55:16.03 3.0 undecidable manual S 0
IV.BDI.HHZ. 2023-07-28T17:55:11.34 3.0 undecidable manual P 0
GU.CARD.HHZ. 2023-07-28T17:55:11.19 0.6 undecidable manual S 126 83.0502 50 -0.28 43
GU.RNCA.HHZ. 2023-07-28T17:55:03.14 0.6 undecidable manual S 271 54.4011 50 -0.69 40
GU.MAIM.HHZ. 2023-07-28T17:55:02.18 0.1 undecidable manual P 132 91.6416 50 0.6 78
GU.EQUI.HHZ. 2023-07-28T17:55:02.59 0.6 undecidable manual S 129 52.8027 93 -0.71 40
IV.PLMA.HHZ. 2023-07-28T17:55:01.65 0.6 undecidable manual S 160 49.4172 93 -0.48 44
GU.CARD.HHZ. 2023-07-28T17:55:00.86 0.1 undecidable manual P 126 83.0502 50 0.6 79
GU.GRAM.HHZ. 2023-07-28T17:54:56.44 0.3 undecidable manual S 86 33.8439 94 -0.28 71
GU.RNCA.HHZ. 2023-07-28T17:54:55.93 0.6 positive manual P 271 54.4011 50 0.08 48
IV.PLMA.HHZ. 2023-07-28T17:54:55.36 0.6 positive manual P 160 49.4172 93 0.49 44
GU.GORR.HHZ. 2023-07-28T17:54:55.72 0.6 undecidable manual S 300 31.4463 95 -0.16 49
GU.EQUI.HHZ. 2023-07-28T17:54:55.61 1.0 positive manual P 129 52.8027 93 0.06 24
GU.GORR.HHZ. 2023-07-28T17:54:51.30 0.1 negative manual P 300 31.4463 95 0.04 100
GU.GRAM.HHZ. 2023-07-28T17:54:51.57 0.6 positive manual P 86 33.8439 94 -0.18 48
IV.MSSA.HHZ. 2023-07-28T17:54:50.58 3.0 positive manual P 1.13 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GU.GORR.HHE. ML:1.5 0.00016199999999999998 0.24 AML other m 2023-07-28T17:54:56.28
GU.GORR.HHN. ML:1.6 0.000208 0.58 AML other m 2023-07-28T17:54:56.31
GU.GRAM.HHN. ML:1.7 0.00022749999999999997 0.4 AML other m 2023-07-28T17:54:57.29
GU.GRAM.HHE. ML:2.0 0.0004575 0.18 AML other m 2023-07-28T17:54:57.86
IV.PLMA.HHN. ML:1.3 0.0000494 1.06 AML other m 2023-07-28T17:55:02.75
GU.RNCA.HHE. ML:1.7 0.000132 0.8 AML other m 2023-07-28T17:55:03.59
IV.PLMA.HHE. ML:1.3 0.0000538 0.58 AML other m 2023-07-28T17:55:05.19
GU.RNCA.HHN. ML:1.5 0.00007145 0.64 AML other m 2023-07-28T17:55:05.66
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