Earthquake with magnitude of ML 1.1 on date 28-08-2021 and time 19:31:36 (UTC) in region 5 km E Gualdo Tadino (PG)

A magnitude ML 1.1 earthquake occured in region: 5 km E Gualdo Tadino (PG), on

  • 28-08-2021 19:31:36 (UTC)
  • 28-08-2021 21:31:36 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.227, 12.852 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.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Gualdo Tadino PG 5 15208 15208
Fiuminata MC 8 1402 16610
Esanatoglia MC 8 2034 18644
Fossato di Vico PG 11 2840 21484
Sefro MC 12 422 21906
Pioraco MC 12 1134 23040
Fabriano AN 13 31480 54520
Matelica MC 13 9981 64501
Nocera Umbra PG 14 5839 70340
Sigillo PG 15 2404 72744
Cerreto d'Esi AN 15 3817 76561
Castelraimondo MC 17 4587 81148
Gagliole MC 18 620 81768
Costacciaro PG 19 1216 82984
Serravalle di Chienti MC 19 1070 84054

Municipalities with at least 50000 inhabitants

An earthquake occurred to
32 Km NE of Foligno (57155 inhabitants)
40 Km E of Perugia (166134 inhabitants)
69 Km SW of Ancona (100861 inhabitants)
70 Km S of Fano (60888 inhabitants)
76 Km N of Terni (111501 inhabitants)
76 Km S of Pesaro (94582 inhabitants)
83 Km E of Arezzo (99543 inhabitants)
94 Km NW of Teramo (54892 inhabitants)
96 Km S of Rimini (147750 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 2021-08-28
19:31:36
43.227 12.8518 10 2021-08-28
19:36:54
Sala Sismica INGV-Roma 94763401
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-08-28 19:31:36 ± 0.08
Latitude 43.2270 ± 0.0027
Longitude 12.8518 ± 0.0037
Depth (km) 10 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 94763401

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 285
Semi-minor axis of confidence ellipse (meter) 220
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 259
Circular confidence region, given by single value of horizontal uncertainty (meter) 280
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 91
Number of associated phases, regardless of their use for origin computation 20
Number of defining phases 19
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.16
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.43707
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 10
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.4
Num. used stations 8
Type of magnitude ML
Reference to an origin 94763401
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-08-28 19:36:54
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.CING.HHZ. 2021-08-28T19:31:48.00 0.1 undecidable manual S 59 0.2905 50 0.05 97
IV.CSP1.EHZ. 2021-08-28T19:31:48.20 0.1 undecidable manual S 118 0.2905 50 0.26 92
IV.ARVD.HHZ. 2021-08-28T19:31:47.59 0.1 undecidable manual S 13 0.2788 50 0 99
IV.ASSB.HHZ. 2021-08-28T19:31:46.15 0.1 undecidable manual S 217 0.232 50 -0.06 100
IV.FDMO.HHZ. 2021-08-28T19:31:46.75 0.1 undecidable manual S 138 0.2563 50 -0.18 98
IV.NRCA.HHZ. 2021-08-28T19:31:45.37 0.6 undecidable manual P 154 0.4371 50 -0.35 45
IV.EL6.EHZ. 2021-08-28T19:31:45.50 0.1 undecidable manual S 61 0.2086 50 -0.02 100
IV.MMUR.HNZ. 2021-08-28T19:31:45.33 3.0 undecidable manual S -1.41 0
IV.SSFR.HHZ. 2021-08-28T19:31:45.52 0.1 undecidable manual S 346 0.2149 50 -0.19 96
IV.ATCC.EHZ. 2021-08-28T19:31:44.27 0.1 undecidable manual S 255 0.1601 120 0.4 97
IV.MML1.EHZ. 2021-08-28T19:31:43.26 0.1 undecidable manual S 142 0.143 123 -0.07 98
IV.CSP1.EHZ. 2021-08-28T19:31:43.26 0.6 positive manual P 118 0.2905 50 0.05 49
IV.CING.HHZ. 2021-08-28T19:31:43.30 0.6 negative manual P 59 0.2905 50 0.09 49
IV.ARVD.HHZ. 2021-08-28T19:31:43.00 0.6 undecidable manual P 13 0.2788 50 0 49
IV.FDMO.HHZ. 2021-08-28T19:31:42.54 1.0 positive manual P 138 0.2563 50 -0.08 25
IV.SSFR.HHZ. 2021-08-28T19:31:41.93 0.6 negative manual P 346 0.2149 50 0.01 50
IV.ASSB.HHZ. 2021-08-28T19:31:41.93 1.0 undecidable manual P 217 0.232 50 -0.28 24
IV.ATCC.EHZ. 2021-08-28T19:31:41.06 0.3 undecidable manual P 255 0.1601 120 0.2 75
IV.EL6.EHZ. 2021-08-28T19:31:41.86 0.3 negative manual P 61 0.2086 50 0.05 75
IV.MML1.EHZ. 2021-08-28T19:31:40.67 0.3 positive manual P 142 0.143 123 0.13 76
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MML1.EHE. ML:0.5 2.805E-5 0.2 AML other m 2021-08-28T19:31:43.66
IV.MML1.EHN. ML:0.5 2.83E-5 0.96 AML other m 2021-08-28T19:31:44.59
IV.MMUR.HNE. ML:2.2 0.00089 0.4 AML other m 2021-08-28T19:31:46.29
IV.MMUR.HNN. ML:2 0.0005805 0.62 AML other m 2021-08-28T19:31:46.25
IV.SSFR.HHN. ML:1.1 8.185E-5 0.8 AML other m 2021-08-28T19:31:46.72
IV.SSFR.HHE. ML:1.1 7.955E-5 1.84 AML other m 2021-08-28T19:31:47.92
IV.NRCA.HHE. ML:1 2.78E-5 1.36 AML other m 2021-08-28T19:31:54.31
IV.NRCA.HHN. ML:1 2.545E-5 0.54 AML other m 2021-08-28T19:31:54.07
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