Earthquake with magnitude of ML 1.1 on date 26-09-2021 and time 18:03:31 (UTC) in region 1 km W Gualdo (MC)

A magnitude ML 1.1 earthquake occured in region: 1 km W Gualdo (MC), on

  • 26-09-2021 18:03:31 (UTC)
  • 26-09-2021 20:03:31 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.07, 13.324 at 22 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 MC 1 815 815
Sarnano MC 4 3264 4079
San Ginesio MC 4 3498 7577
Sant'Angelo in Pontano MC 7 1436 9013
Cessapalombo MC 7 512 9525
Penna San Giovanni MC 8 1108 10633
Camporotondo di Fiastrone MC 8 563 11196
Ripe San Ginesio MC 9 852 12048
Amandola FM 10 3629 15677
Monte San Martino MC 10 765 16442
Colmurano MC 11 1263 17705
Caldarola MC 11 1823 19528
Bolognola MC 11 142 19670
Smerillo FM 12 365 20035
Belforte del Chienti MC 13 1886 21921
Acquacanina MC 13 121 22042
Falerone FM 13 3337 25379
Loro Piceno MC 13 2401 27780
Servigliano FM 14 2336 30116
Montappone FM 14 1682 31798
Fiastra MC 14 559 32357
Montefortino FM 14 1178 33535
Montefalcone Appennino FM 14 424 33959
Monte Vidon Corrado FM 14 731 34690
Comunanza AP 14 3166 37856
Urbisaglia MC 15 2628 40484
Santa Vittoria in Matenano FM 15 1330 41814
Massa Fermana FM 15 963 42777
Tolentino MC 16 20069 62846
Serrapetrona MC 16 966 63812
Monteleone di Fermo FM 17 395 64207
Belmonte Piceno FM 18 646 64853
Force AP 18 1354 66207
Montelparo FM 18 778 66985
Mogliano MC 18 4696 71681
Montegiorgio FM 19 6851 78532
Montemonaco AP 19 604 79136
Monsampietro Morico FM 19 659 79795
Fiordimonte MC 19 202 79997
Pievebovigliana MC 19 866 80863

Municipalities with at least 50000 inhabitants

An earthquake occurred to
52 Km E of Foligno (57155 inhabitants)
55 Km NW of Teramo (54892 inhabitants)
63 Km S of Ancona (100861 inhabitants)
76 Km E of Perugia (166134 inhabitants)
79 Km NE of Terni (111501 inhabitants)
80 Km N of L'Aquila (69753 inhabitants)
90 Km S of Fano (60888 inhabitants)
91 Km NW of Montesilvano (53738 inhabitants)
99 Km NW of Pescara (121014 inhabitants)
99 Km SE of Pesaro (94582 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 1.1 2021-09-26
18:03:31
43.0697 13.3237 22 2021-09-26
18:14:19
Sala Sismica INGV-Roma 95916681
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-26 18:03:31 ± 0.11
Latitude 43.0697 ± 0.0063
Longitude 13.3237 ± 0.0074
Depth (km) 22 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 95916681

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 674
Semi-minor axis of confidence ellipse (meter) 436
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 236
Circular confidence region, given by single value of horizontal uncertainty (meter) 670
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 109
Number of associated phases, regardless of their use for origin computation 20
Number of defining phases 18
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.15
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.43887
Number of stations at which the event was observed 14
Number of stations from which data was used for origin computation 12
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.3
Num. used stations 13
Type of magnitude ML
Reference to an origin 95916681
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-26 18:14:19
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.FIR.HHZ. 2021-09-26T18:04:02.91 3.0 undecidable manual Pg 5.5 0
IV.PE3.EHZ. 2021-09-26T18:03:59.59 3.0 undecidable manual S 1.07 0
IV.EL6.EHZ. 2021-09-26T18:03:44.12 0.6 undecidable manual S 328 0.3058 115 0.27 46
IV.MML1.EHZ. 2021-09-26T18:03:42.96 0.6 undecidable manual S 280 0.2608 119 0.31 47
IV.SMA1.EHZ. 2021-09-26T18:03:40.76 0.6 negative manual P 179 0.4389 106 -0.09 47
IV.FDMO.HHZ. 2021-09-26T18:03:40.67 0.6 undecidable manual S 259 0.1754 132 0.07 50
IV.PF6.EHZ. 2021-09-26T18:03:39.13 0.3 undecidable manual S 306 0.116 145 -0.3 72
IV.MF5.EHZ. 2021-09-26T18:03:39.89 1.0 undecidable manual S 129 0.1286 142 0.25 25
IV.CSP1.EHZ. 2021-09-26T18:03:39.04 0.3 undecidable manual S 284 0.0899 152 0.03 77
IV.NRCA.HHZ. 2021-09-26T18:03:38.38 0.1 positive manual P 213 0.2815 117 0.05 98
IV.CING.HHZ. 2021-09-26T18:03:38.72 1.0 undecidable manual P 343 0.3202 113 -0.21 24
IV.EL6.EHZ. 2021-09-26T18:03:38.94 1.0 undecidable manual P 328 0.3058 115 0.23 23
IV.CESI.HHZ. 2021-09-26T18:03:38.77 1.0 undecidable manual P 258 0.313 114 -0.05 25
IV.MML1.EHZ. 2021-09-26T18:03:37.97 0.6 undecidable manual P 280 0.2608 119 -0.05 50
IV.MNTT.EHZ. 2021-09-26T18:03:37.54 1.0 undecidable manual P 92 0.1988 128 0.4 23
IV.MF5.EHZ. 2021-09-26T18:03:36.59 1.0 positive manual P 129 0.1286 142 0.31 24
IV.FDMO.HHZ. 2021-09-26T18:03:36.76 0.1 negative manual P 259 0.1754 132 -0.07 100
IV.MMO1.EHZ. 2021-09-26T18:03:36.77 0.3 negative manual P 179 0.17 133 0.01 76
IV.CSP1.EHZ. 2021-09-26T18:03:35.85 0.3 undecidable manual P 284 0.0899 152 -0.06 76
IV.PF6.EHZ. 2021-09-26T18:03:35.90 0.3 undecidable manual P 306 0.116 145 -0.26 73
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHE. ML:1.6 0.00015021255 0.1408 AML other m 2021-09-26T18:03:43.69
IV.NRCA.HHN. ML:1.7 0.00018378235 0.1024 AML other m 2021-09-26T18:03:44.13
IV.CING.HHN. ML:1.1 4.49649035E-5 0.128 AML other m 2021-09-26T18:03:44.56
IV.CING.HHE. ML:1.5 9.99E-5 0.28 AML other m 2021-09-26T18:03:44.57
IV.FDMO.HHE. ML:0.9 4.5252515E-5 0.1408 AML other m 2021-09-26T18:03:40.89
IV.FDMO.HHN. ML:0.9 3.7988735E-5 0.192 AML other m 2021-09-26T18:03:41.72
IV.MNTT.EHE. ML:1.9 0.0004172485 0.1024 AML other m 2021-09-26T18:03:43.72
IV.MNTT.EHN. ML:1.5 0.0001591012 0.1536 AML other m 2021-09-26T18:03:43.20
IV.MML1.HNE. ML:1.4 0.000109129205 1.2672 AML other m 2021-09-26T18:03:44.58
IV.MML1.HNN. ML:1.1 5.591133E-5 0.7808 AML other m 2021-09-26T18:03:43.52
IV.MML1.EHE. ML:0.7 2.2284535E-5 0.1536 AML other m 2021-09-26T18:03:43.17
IV.MML1.EHN. ML:0.9 2.9493235E-5 0.1792 AML other m 2021-09-26T18:03:43.08
IV.CING.HNN. ML:3.2 0.0058912415 1.2672 AML other m 2021-09-26T18:03:43.88
IV.CESI.HHE. ML:0.9 2.3499575E-5 0.1152 AML other m 2021-09-26T18:03:45.20
IV.CESI.HHN. ML:1.2 4.919485E-5 0.1664 AML other m 2021-09-26T18:03:45.45
IV.CESI.HNN. ML:1.5 0.00012080658 0.576 AML other m 2021-09-26T18:03:58.28
IV.EL6.EHE. ML:1.3 7.5898895E-5 0.9728 AML other m 2021-09-26T18:03:44.20
IV.EL6.EHN. ML:1 3.410307E-5 0.4224 AML other m 2021-09-26T18:03:45.00
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