Earthquake with magnitude of ML 0.9 on date 11-09-2021 and time 02:48:27 (UTC) in region 1 km NE San Gregorio Magno (SA)

A magnitude ML 0.9 earthquake occured in region: 1 km NE San Gregorio Magno (SA), on

  • 11-09-2021 02:48:27 (UTC)
  • 11-09-2021 04:48:27 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 40.664, 15.405 at 8 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
San Gregorio Magno SA 1 4286 4286
Romagnano al Monte SA 5 368 4654
Buccino SA 5 5047 9701
Ricigliano SA 7 1144 10845
Balvano PZ 9 1830 12675
Salvitelle SA 9 560 13235
Palomonte SA 10 3985 17220
Vietri di Potenza PZ 11 2832 20052
Colliano SA 12 3638 23690
Auletta SA 12 2336 26026
Muro Lucano PZ 12 5497 31523
Caggiano SA 13 2765 34288
Castelgrande PZ 14 943 35231
Pertosa SA 14 690 35921
Contursi Terme SA 14 3394 39315
Valva SA 14 1643 40958
Sicignano degli Alburni SA 14 3519 44477
Oliveto Citra SA 15 3802 48279
Petina SA 15 1159 49438
Bella PZ 15 5171 54609
Laviano SA 16 1438 56047
Baragiano PZ 16 2671 58718
Savoia di Lucania PZ 16 1127 59845
Santomenna SA 18 443 60288
Polla SA 18 5279 65567
Sant'Angelo Le Fratte PZ 18 1429 66996
Castelnuovo di Conza SA 19 619 67615
Postiglione SA 19 2151 69766
Senerchia AV 19 842 70608
Pescopagano PZ 19 1910 72518
Picerno PZ 20 5985 78503

Municipalities with at least 50000 inhabitants

An earthquake occurred to
34 Km W of Potenza (67122 inhabitants)
36 Km E of Battipaglia (50786 inhabitants)
54 Km E of Salerno (135261 inhabitants)
58 Km E of Avellino (54857 inhabitants)
59 Km E of Cava de' Tirreni (53659 inhabitants)
74 Km SE of Benevento (60091 inhabitants)
75 Km E of Scafati (50787 inhabitants)
78 Km E of Castellammare di Stabia (66466 inhabitants)
79 Km SW of Cerignola (58396 inhabitants)
89 Km E of Torre del Greco (86275 inhabitants)
90 Km S of Foggia (151991 inhabitants)
90 Km E of Portici (55274 inhabitants)
91 Km E of Ercolano (53709 inhabitants)
93 Km E of Acerra (59573 inhabitants)
97 Km E of Afragola (65057 inhabitants)
98 Km SW of Andria (100440 inhabitants)
98 Km E of Casoria (77642 inhabitants)
98 Km W of Altamura (70396 inhabitants)
99 Km E of Napoli (974074 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 earthquake resentment in the area, expressed in terms of intensity on the MCS scale (Mercalli-Cancani-Sieberg). Intensities are determined using data from questionnaires collected on the website http://www.hsit.it. The intensities shown are determined considering all the reports received from each municipality, and are all the more reliable the greater the number of questionnaires. The collected data are subjected to an automatic statistical filter, but are not checked individually. In particular, intensities greater than or equal to the VI degree of the MCS or EMS scale require on-site verification by specialized personnel. The black star is the epicenter of the earthquake that occurred. This map is updated every time citizens fill out new questionnaires. The number of questionnaires processed to obtain this map, the date and time of the last update are shown at the top right.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100
ML 0.9 2021-09-11
02:48:27
40.6643 15.4053 8 2021-09-11
02:55:02
Sala Sismica INGV-Roma 95287721
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-11 02:48:27 ± 0.27
Latitude 40.6643 ± 0.0063
Longitude 15.4053 ± 0.0083
Depth (km) 8 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 95287721

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 785
Semi-minor axis of confidence ellipse (meter) 397
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 123
Circular confidence region, given by single value of horizontal uncertainty (meter) 790
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 78
Number of associated phases, regardless of their use for origin computation 17
Number of defining phases 16
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.31
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.23292
Number of stations at which the event was observed 12
Number of stations from which data was used for origin computation 11
Magnitude information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 95287721
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-11 02:55:02
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.CMPR.HHZ. 2021-09-11T02:48:41.67 3.0 undecidable manual S -0.52 0
IV.CDRU.HHZ. 2021-09-11T02:48:35.99 0.3 undecidable manual S 204 0.1907 110 0.18 74
IV.SGO.HHE. 2021-09-11T02:48:34.04 0.3 undecidable manual S 216 0.1277 119 0.44 71
IX.RDM3.HHE.02 2021-09-11T02:48:33.76 0.6 undecidable manual P 25 0.2329 107 0.37 47
IV.MRLC.HHZ. 2021-09-11T02:48:33.27 0.1 undecidable manual S 35 0.1115 122 0.2 100
IX.SNR3.EHZ.02 2021-09-11T02:48:32.90 0.3 undecidable manual P 294 0.1763 112 0.7 64
IV.CDRU.HHZ. 2021-09-11T02:48:32.19 0.6 undecidable manual P 204 0.1907 110 -0.31 48
IX.SCL3.EHZ.02 2021-09-11T02:48:32.70 0.3 undecidable manual S 69 0.0863 129 0.43 72
IV.CAGG.EHZ. 2021-09-11T02:48:31.40 0.3 undecidable manual P 143 0.134 118 0.06 77
IX.COL3.HHZ.02 2021-09-11T02:48:31.26 0.3 undecidable manual S 292 0.0612 139 -0.32 74
IX.CGG3.HNZ.01 2021-09-11T02:48:31.66 0.3 undecidable manual P 144 0.1511 115 -0.03 77
IX.SRN3.HHZ.02 2021-09-11T02:48:31.99 0.3 undecidable manual P 167 0.1826 111 -0.34 72
IV.SGO.HHE. 2021-09-11T02:48:31.17 0.3 undecidable manual P 216 0.1277 119 -0.05 77
IV.MRLC.HHZ. 2021-09-11T02:48:30.81 0.3 positive manual P 35 0.1115 122 -0.11 76
IX.SCL3.EHZ.02 2021-09-11T02:48:30.07 0.1 positive manual P 69 0.0863 129 -0.38 97
IX.COL3.HHZ.02 2021-09-11T02:48:29.76 0.1 undecidable manual P 292 0.0612 139 -0.3 99
IX.VDS3.HNZ.01 2021-09-11T02:48:29.91 0.6 undecidable manual P 12 0.0782 132 -0.41 48
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MRLC.HHE. ML:1 0.0001085 1 AML other m 2021-09-11T02:48:33.96
IV.MRLC.HHN. ML:1 0.00010945 1.16 AML other m 2021-09-11T02:48:34.22
IV.CDRU.HHN. ML:0.6 2.825E-5 1.5 AML other m 2021-09-11T02:48:36.24
IX.SRN3.HHE.02 ML:1 8.655E-5 0.94 AML other m 2021-09-11T02:48:37.80
IV.CDRU.HHE. ML:0.6 2.79E-5 0.46 AML other m 2021-09-11T02:48:37.11
IX.SRN3.HHN.02 ML:1.1 9.99E-5 0.32 AML other m 2021-09-11T02:48:37.88
IX.SNR3.EHN.02 ML:1 6.835E-5 0.28 AML other m 2021-09-11T02:48:40.51
IX.SNR3.EHE.02 ML:0.6 3.315E-5 0.54 AML other m 2021-09-11T02:48:40.68
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