Earthquake with magnitude of ML 1.8 on date 07-07-2021 and time 03:35:15 (Italy) in region Tirreno Meridionale (MARE)

A magnitude ML 1.8 earthquake occured in region: Tirreno Meridionale (MARE), on

  • 07-07-2021 01:35:15 (UTC)
  • 07-07-2021 03:35:15 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 39.929, 14.829 at 31 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

No Italian municipalities within 20 km distance.

Municipalities with at least 50000 inhabitants

An earthquake occurred to
77 Km S of Battipaglia (50786 inhabitants)
84 Km S of Salerno (135261 inhabitants)
87 Km S of Cava de' Tirreni (53659 inhabitants)
90 Km SE of Castellammare di Stabia (66466 inhabitants)
95 Km S of Scafati (50787 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 1.8 2021-07-07
01:35:15
39.9287 14.8292 31 2021-07-07
01:59:30
Sala Sismica INGV-Roma 92329381
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-07-07 01:35:15 ± 0.29
Latitude 39.9287 ± 0.0117
Longitude 14.8292 ± 0.0246
Depth (km) 31 ± 3 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 92329381

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1936
Semi-minor axis of confidence ellipse (meter) 999
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 290
Circular confidence region, given by single value of horizontal uncertainty (meter) 1940
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 263
Number of associated phases, regardless of their use for origin computation 26
Number of defining phases 22
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.36
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.95328
Number of stations at which the event was observed 18
Number of stations from which data was used for origin computation 15
Magnitude information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.2
Num. used stations 22
Type of magnitude ML
Reference to an origin 92329381
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-07-07 01:59:30
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.HVIT.HHZ. 2021-07-07T01:36:00.61 3.0 undecidable manual Pn -6.06 0
IV.LAV9.HHZ. 2021-07-07T01:35:58.39 3.0 undecidable manual Pn 2.38 0
IV.ICAI.EHZ. 2021-07-07T01:35:50.56 3.0 undecidable manual Sn -0.92 0
MN.CUC.HHZ. 2021-07-07T01:35:42.42 0.6 undecidable manual S 85 0.7581 106 0.88 42
IX.SRN3.HHZ.02 2021-07-07T01:35:41.72 1.0 undecidable manual S 41 0.7356 106 0.84 22
IV.SGO.HHN. 2021-07-07T01:35:41.19 0.3 undecidable manual S 30 0.7293 106 0.48 74
IX.PST3.HNE.01 2021-07-07T01:35:39.83 1.0 undecidable manual S 26 0.7069 107 -0.23 26
IV.CDRU.HHZ. 2021-07-07T01:35:38.96 0.6 undecidable manual S 33 0.6682 108 -0.01 54
IV.ICAI.EHZ. 2021-07-07T01:35:38.89 3.0 positive manual P 1.28 0
IV.MGR.HHE. 2021-07-07T01:35:37.03 0.3 undecidable manual S 69 0.5927 110 0.18 81
IV.CMPR.HHZ. 2021-07-07T01:35:35.02 0.3 undecidable manual S 43 0.5315 113 -0.16 81
IV.CET2.HHZ. 2021-07-07T01:35:34.05 0.6 undecidable manual P 114 0.9533 54 0.2 49
IX.SCL3.HNN.02 2021-07-07T01:35:34.22 0.6 undecidable manual P 34 0.9254 54 0.75 42
IV.MCRV.HHZ. 2021-07-07T01:35:33.00 0.6 undecidable manual P 17 0.8921 103 0.09 52
IX.COL3.HHN.02 2021-07-07T01:35:32.56 0.3 undecidable manual P 27 0.849 104 0.37 74
IX.SNR3.EHE.02 2021-07-07T01:35:32.57 0.6 undecidable manual P 19 0.8526 104 0.31 50
IV.GRIS.EHZ. 2021-07-07T01:35:32.08 1.0 undecidable manual P 103 0.8076 104 0.57 23
IV.MTSN.HHZ. 2021-07-07T01:35:31.37 1.0 positive manual P 64 0.7815 105 0.29 25
MN.CUC.HHZ. 2021-07-07T01:35:30.66 0.3 undecidable manual P 85 0.7581 106 -0.03 80
IX.PST3.HNE.01 2021-07-07T01:35:30.17 0.6 undecidable manual P 26 0.7069 107 0.33 51
IX.SRN3.HHZ.02 2021-07-07T01:35:29.80 0.6 undecidable manual P 41 0.7356 106 -0.51 48
IV.SGO.HHN. 2021-07-07T01:35:29.93 0.6 undecidable manual P 30 0.7293 106 -0.28 51
IX.TEGI.HNE.01 2021-07-07T01:35:29.76 0.3 undecidable manual P 50 0.7042 107 -0.04 81
IV.CDRU.HHZ. 2021-07-07T01:35:28.78 0.1 undecidable manual P 33 0.6682 108 -0.43 100
IV.MGR.HHE. 2021-07-07T01:35:26.79 0.3 undecidable manual P 69 0.5927 110 -1.2 55
IV.CMPR.HHZ. 2021-07-07T01:35:26.06 0.3 undecidable manual P 43 0.5315 113 -0.96 62
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CMPR.HHE. ML:1.7 8.29E-5 0.28 AML other m 2021-07-07T01:35:37.52
IV.CMPR.HHN. ML:1.6 8.233816E-5 0.24 AML other m 2021-07-07T01:35:38.84
IV.CDRU.HHE. ML:1.6 5.72E-5 0.22 AML other m 2021-07-07T01:35:40.64
IV.CDRU.HHN. ML:1.8 9.2562045E-5 0.24 AML other m 2021-07-07T01:35:42.05
IX.SRN3.HHE.02 ML:2.2 0.00018527645 0.176 AML other m 2021-07-07T01:35:43.32
IX.SRN3.HHN.02 ML:2.3 0.0002595 0.58 AML other m 2021-07-07T01:35:44.14
MN.CUC.HHN. ML:1.8 7.08E-5 1.7 AML other m 2021-07-07T01:35:45.87
IV.GRIS.EHN. ML:1.6 3.8690495E-5 0.2 AML other m 2021-07-07T01:35:50.30
MN.CUC.HHE. ML:1.7 5.8863725E-5 0.54 AML other m 2021-07-07T01:35:46.90
IV.MTSN.HHN. ML:1.9 9.586739E-5 0.32 AML other m 2021-07-07T01:35:52.29
IV.CET2.HHE. ML:1.8 5.025E-5 0.44 AML other m 2021-07-07T01:35:49.70
IV.MCRV.HHN. ML:0 4.419545E-5 0.34 AML other m 2021-07-07T01:35:51.27
IV.MTSN.HHE. ML:1.7 5.99117E-5 0.4 AML other m 2021-07-07T01:35:52.20
IV.GRIS.EHE. ML:1.6 4.1465515E-5 0.26 AML other m 2021-07-07T01:35:52.98
IV.MCRV.HHE. ML:0 1.987182E-5 0.3 AML other m 2021-07-07T01:35:53.95
IV.CET2.HHN. ML:1.8 5.729548E-5 0.38 AML other m 2021-07-07T01:35:58.90
IV.CMPR.HNE. ML:1.9 0.0001440506 0.2304 AML other m 2021-07-07T01:35:36.54
IV.CDRU.HNE. ML:2 0.00013607255 0.1704 AML other m 2021-07-07T01:35:41.22
IV.CDRU.HNN. ML:1.8 9.6664455E-5 0.2296 AML other m 2021-07-07T01:35:42.06
MN.CUC.HNE. ML:1.8 7.204616E-5 0.5 AML other m 2021-07-07T01:35:50.94
IV.MTSN.HNE. ML:1.8 6.6481375E-5 0.4896 AML other m 2021-07-07T01:35:51.79
IV.MTSN.HNN. ML:2 9.8951925E-5 0.3 AML other m 2021-07-07T01:35:52.30
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