Earthquake with magnitude of ML 1.1 on date 30-10-2021 and time 09:37:43 (UTC) in region 5 km S Giano dell'Umbria (PG)

A magnitude ML 1.1 earthquake occured in region: 5 km S Giano dell'Umbria (PG), on

  • 30-10-2021 09:37:43 (UTC)
  • 30-10-2021 11:37:43 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.79, 12.587 at 5 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
Giano dell'Umbria PG 5 3846 3846
Massa Martana PG 5 3770 7616
Castel Ritaldi PG 8 3278 10894
Acquasparta TR 11 4778 15672
Montefalco PG 13 5679 21351
Gualdo Cattaneo PG 14 6155 27506
Spoleto PG 14 38218 65724
Todi PG 15 16851 82575
Campello sul Clitunno PG 16 2442 85017
Bevagna PG 16 5081 90098
Trevi PG 16 8469 98567
Collazzone PG 17 3473 102040
Montecastrilli TR 17 5022 107062
Fratta Todina PG 20 1839 108901
Avigliano Umbro TR 20 2558 111459
San Gemini TR 20 5018 116477
Monte Castello di Vibio PG 20 1567 118044

Municipalities with at least 50000 inhabitants

An earthquake occurred to
21 Km SW of Foligno (57155 inhabitants)
26 Km N of Terni (111501 inhabitants)
39 Km SE of Perugia (166134 inhabitants)
57 Km NE of Viterbo (67173 inhabitants)
82 Km NW of L'Aquila (69753 inhabitants)
89 Km N of Guidonia Montecelio (88673 inhabitants)
93 Km W of Teramo (54892 inhabitants)
93 Km N of Tivoli (56533 inhabitants)
95 Km SE of Arezzo (99543 inhabitants)
100 Km N of Roma (2864731 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 1.1 2021-10-30
09:37:43
42.7898 12.5872 5 2021-10-30
09:47:51
Sala Sismica INGV-Roma 97084441
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-30 09:37:43 ± 0.1
Latitude 42.7898 ± 0.0045
Longitude 12.5872 ± 0.0098
Depth (km) 5 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 97084441

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 775
Semi-minor axis of confidence ellipse (meter) 355
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 276
Circular confidence region, given by single value of horizontal uncertainty (meter) 770
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 110
Number of associated phases, regardless of their use for origin computation 16
Number of defining phases 16
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.26
Epicentral distance of station closest to the epicenter (degree) 0.01889
Epicentral distance of station farthest from the epicenter (degree) 0.54319
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 11
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 12
Type of magnitude ML
Reference to an origin 97084441
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-30 09:47:51
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.CESI.HNE. 2021-10-30T09:37:55.71 0.3 undecidable manual S 47 0.3166 98 0.39 66
IV.CSP1.EHZ. 2021-10-30T09:37:54.24 0.3 undecidable manual P 56 0.5432 50 -0.28 64
IV.ASSB.HHZ. 2021-10-30T09:37:53.45 0.1 undecidable manual S 12 0.2581 100 0.36 89
IV.MML1.EHZ. 2021-10-30T09:37:52.27 0.1 undecidable manual P 41 0.429 50 -0.28 88
IV.MC2.EHE. 2021-10-30T09:37:52.89 0.3 undecidable manual P 74 0.4578 50 -0.15 67
IV.LNSS.HHZ. 2021-10-30T09:37:51.12 0.3 undecidable manual P 119 0.3813 97 -0.44 64
IV.MGAB.HHZ. 2021-10-30T09:37:51.48 0.3 undecidable manual P 290 0.3687 97 0.2 68
IV.CESX.HHZ. 2021-10-30T09:37:50.32 0.1 undecidable manual S 180 0.1817 104 0.12 95
IV.CESI.HNE. 2021-10-30T09:37:49.96 0.1 undecidable manual P 47 0.3166 98 -0.16 92
IV.ASSB.HHZ. 2021-10-30T09:37:48.86 0.3 undecidable manual P 12 0.2581 100 0.03 72
IV.GAVE.EHZ. 2021-10-30T09:37:48.87 0.3 undecidable manual P 113 0.2455 100 0.31 68
IV.CESX.HHZ. 2021-10-30T09:37:47.51 0.3 undecidable manual P 180 0.1817 104 0.35 68
IV.MOMA.HHZ. 2021-10-30T09:37:44.64 0.1 undecidable manual S 318 0.0189 157 -0.22 96
IT.GNU.HGZ. 2021-10-30T09:37:44.12 0.1 undecidable manual P 318 0.0189 157 0.04 100
IV.MOMA.HHZ. 2021-10-30T09:37:44.14 0.1 undecidable manual P 318 0.0189 157 0.06 100
IT.GNU.HGZ. 2021-10-30T09:37:44.63 0.1 undecidable manual S 318 0.0189 157 -0.23 96
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MOMA.HHN. ML:0 0.00746 1 AML other m 2021-10-30T09:37:44.24
IV.MOMA.HNN. ML:0 0.00679 1 AML other m 2021-10-30T09:37:44.25
IV.MOMA.HHE. ML:0 0.010045 0.12 AML other m 2021-10-30T09:37:44.79
IV.MOMA.HNE. ML:0 0.00917 0.12 AML other m 2021-10-30T09:37:44.79
IV.CESX.HHN. ML:1.4 0.000197 0.2 AML other m 2021-10-30T09:37:51.94
IV.CESX.HHE. ML:1.1 0.0001102 0.5 AML other m 2021-10-30T09:37:53.32
IV.ASSB.HHN. ML:0.9 4.465E-5 0.36 AML other m 2021-10-30T09:37:55.01
IV.GAVE.EHN. ML:1.1 6.745E-5 0.22 AML other m 2021-10-30T09:37:55.18
IV.GAVE.EHE. ML:1.2 8.61E-5 0.14 AML other m 2021-10-30T09:37:55.26
IV.ASSB.HHE. ML:0.9 4.67E-5 0.2 AML other m 2021-10-30T09:37:55.30
IV.LNSS.HHE. ML:1.2 5.44E-5 0.54 AML other m 2021-10-30T09:37:58.06
IV.MGAB.HHN. ML:1.2 5.815E-5 0.18 AML other m 2021-10-30T09:37:58.65
IV.MGAB.HHE. ML:1 3.545E-5 1.16 AML other m 2021-10-30T09:37:59.70
IV.LNSS.HHN. ML:1.1 4.63E-5 1.2 AML other m 2021-10-30T09:38:00.15
IV.MML1.EHE. ML:0.9 2.3E-5 0.6 AML other m 2021-10-30T09:38:03.24
IV.MML1.EHN. ML:0.8 2.13E-5 1.28 AML other m 2021-10-30T09:38:03.16
IV.IMTC.HHE. ML:3.4 0.000423 1 AML other m 2021-10-30T09:38:26.24
IV.IMTC.HHN. ML:2.3 3.325E-5 0.84 AML other m 2021-10-30T09:38:26.16
IV.ZEN8.EHE. ML:3.5 0.000246 1 AML other m 2021-10-30T09:38:36.99
IV.ZEN8.EHN. ML:3.5 0.0002775 0.06 AML other m 2021-10-30T09:38:36.81
IV.SGTA.HHN. ML:3.1 0.000167 0.16 AML other m 2021-10-30T09:38:59.54
IV.SGTA.HHE. ML:3.1 0.0001715 1.4 AML other m 2021-10-30T09:38:59.04
OT.OT17.EHE. ML:3.6 0.0007675 0.68 AML other m 2021-10-30T09:39:02.88
OT.OT17.EHN. ML:3.8 0.00117 0.06 AML other m 2021-10-30T09:39:04.04
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