Earthquake with magnitude of ML 1.5 on date 27-09-2021 and time 20:48:20 (Italy) in region 6 km W Treia (MC)

A magnitude ML 1.5 earthquake occured in region: 6 km W Treia (MC), on

  • 27-09-2021 18:48:20 (UTC)
  • 27-09-2021 20:48:20 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.292, 13.242 at 24 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
Treia MC 6 9403 9403
San Severino Marche MC 9 12726 22129
Pollenza MC 9 6618 28747
Cingoli MC 9 10352 39099
Tolentino MC 10 20069 59168
Appignano MC 12 4213 63381
Serrapetrona MC 13 966 64347
Belforte del Chienti MC 14 1886 66233
Apiro MC 14 2280 68513
Gagliole MC 15 620 69133
Urbisaglia MC 15 2628 71761
Poggio San Vicino MC 16 246 72007
Staffolo AN 16 2253 74260
Colmurano MC 17 1263 75523
Caldarola MC 17 1823 77346
Macerata MC 17 42473 119819
Castelraimondo MC 17 4587 124406
Montecassiano MC 18 7125 131531
Camporotondo di Fiastrone MC 18 563 132094
Filottrano AN 18 9499 141593
San Paolo di Jesi AN 19 933 142526
Matelica MC 19 9981 152507
Ripe San Ginesio MC 19 852 153359
Petriolo MC 20 1998 155357
Loro Piceno MC 20 2401 157758
Cupramontana AN 20 4756 162514

Municipalities with at least 50000 inhabitants

An earthquake occurred to
43 Km SW of Ancona (100861 inhabitants)
57 Km NE of Foligno (57155 inhabitants)
64 Km S of Fano (60888 inhabitants)
72 Km E of Perugia (166134 inhabitants)
74 Km SE of Pesaro (94582 inhabitants)
80 Km NW of Teramo (54892 inhabitants)
95 Km NE of Terni (111501 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 1.5 2021-09-27
18:48:20
43.2923 13.2422 24 2021-09-27
18:55:01
Sala Sismica INGV-Roma 95958781
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-27 18:48:20 ± 0.18
Latitude 43.2923 ± 0.0072
Longitude 13.2422 ± 0.0099
Depth (km) 24 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 95958781

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 754
Semi-minor axis of confidence ellipse (meter) 476
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 261
Circular confidence region, given by single value of horizontal uncertainty (meter) 750
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 174
Number of associated phases, regardless of their use for origin computation 29
Number of defining phases 26
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.23
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.70507
Number of stations at which the event was observed 17
Number of stations from which data was used for origin computation 14
Magnitude information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.2
Num. used stations 20
Type of magnitude ML
Reference to an origin 95958781
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-27 18:55:01
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.RIBO.EHZ.01 2021-09-27T18:48:50.30 3.0 undecidable manual Pn 0.74 0
IV.ASSB.HHZ. 2021-09-27T18:48:37.70 0.6 undecidable manual S 240 0.4928 107 0.07 46
IV.NRCA.HHZ. 2021-09-27T18:48:36.80 0.6 undecidable manual S 192 0.4676 108 -0.12 46
IV.MC2.EHZ. 2021-09-27T18:48:34.60 0.3 undecidable manual S 186 0.3831 113 0.05 69
IV.CESI.HHZ. 2021-09-27T18:48:34.60 0.6 undecidable manual S 221 0.3786 113 0.17 45
IV.TERO.HHZ. 2021-09-27T18:48:34.52 3.0 undecidable manual P -0.12 0
IV.MF5.EHZ. 2021-09-27T18:48:34.30 0.6 undecidable manual S 152 0.3435 116 0.81 37
IV.GAVE.EHZ. 2021-09-27T18:48:33.15 0.6 undecidable manual P 203 0.6511 102 0.33 42
IV.LNSS.HHZ. 2021-09-27T18:48:32.95 0.1 undecidable manual P 192 0.7051 101 -0.75 73
IV.FDMO.HHZ. 2021-09-27T18:48:31.40 0.3 undecidable manual S 204 0.2797 122 -0.43 67
IV.MML1.EHZ. 2021-09-27T18:48:31.50 0.6 undecidable manual S 228 0.2662 123 0.01 48
IV.SNTG.HHZ. 2021-09-27T18:48:30.60 0.6 undecidable manual S 260 0.2221 129 0.16 48
IV.PP3.EHZ. 2021-09-27T18:48:30.64 3.0 undecidable manual S -0.83 0
IV.GUMA.HHZ. 2021-09-27T18:48:30.90 0.6 undecidable manual S 163 0.2392 126 0.06 48
IV.ASSB.HHZ. 2021-09-27T18:48:30.89 1.0 negative manual P 240 0.4928 107 0.7 19
IV.NRCA.HHZ. 2021-09-27T18:48:29.53 0.6 positive manual P 192 0.4676 108 -0.25 44
IV.CSP1.EHZ. 2021-09-27T18:48:29.70 0.6 undecidable manual S 188 0.2023 132 -0.28 47
IV.MF5.EHZ. 2021-09-27T18:48:28.27 1.0 positive manual P 152 0.3435 116 0.47 22
IV.EL6.EHZ. 2021-09-27T18:48:28.20 0.6 undecidable manual S 290 0.1088 150 -0.02 49
IV.MC2.EHZ. 2021-09-27T18:48:28.35 1.0 positive manual P 186 0.3831 113 -0.06 24
IV.CESI.HHZ. 2021-09-27T18:48:28.33 0.1 undecidable manual P 221 0.3786 113 -0.02 95
IV.CING.HHZ. 2021-09-27T18:48:27.80 0.6 undecidable manual S 338 0.0899 155 -0.17 48
IV.MML1.EHZ. 2021-09-27T18:48:26.70 0.6 undecidable manual P 228 0.2662 123 0.06 48
IV.GUMA.HHZ. 2021-09-27T18:48:26.30 0.1 positive manual P 163 0.2392 126 0.03 97
IV.SNTG.HHZ. 2021-09-27T18:48:26.42 0.6 negative manual P 260 0.2221 129 0.38 45
IV.FDMO.HHZ. 2021-09-27T18:48:26.64 0.6 negative manual P 204 0.2797 122 -0.2 47
IV.CSP1.EHZ. 2021-09-27T18:48:25.61 0.1 positive manual P 188 0.2023 132 -0.17 95
IV.CING.HHZ. 2021-09-27T18:48:24.68 0.1 negative manual P 338 0.0899 155 0.07 100
IV.EL6.EHZ. 2021-09-27T18:48:24.91 0.1 positive manual P 290 0.1088 150 0.15 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CING.HHN. ML:1.4 0.0001465 1.88 AML other m 2021-09-27T18:48:27.98
IV.CING.HHE. ML:1.3 0.0001105 0.86 AML other m 2021-09-27T18:48:28.07
IV.EL6.EHE. ML:1.5 0.0002025 0.28 AML other m 2021-09-27T18:48:28.52
IV.EL6.EHN. ML:1.4 0.0001475 0.22 AML other m 2021-09-27T18:48:28.64
IV.CSP1.EHN. ML:1.8 0.000323 1.14 AML other m 2021-09-27T18:48:30.10
IV.CSP1.EHE. ML:1.8 0.0003065 1.46 AML other m 2021-09-27T18:48:30.92
IV.SNTG.HHE. ML:1.1 5.455E-5 0.22 AML other m 2021-09-27T18:48:30.94
IV.SNTG.HHN. ML:1.1 4.765E-5 0.26 AML other m 2021-09-27T18:48:30.86
IV.GUMA.HHN. ML:1.5 0.000132 0.16 AML other m 2021-09-27T18:48:31.17
IV.FDMO.HHE. ML:1.6 0.000146 0.22 AML other m 2021-09-27T18:48:31.72
IV.FDMO.HHN. ML:1.4 9.91E-5 0.18 AML other m 2021-09-27T18:48:31.83
IV.MML1.EHN. ML:1.4 0.00010385 1.06 AML other m 2021-09-27T18:48:31.93
IV.MML1.EHE. ML:1.6 0.0001555 0.22 AML other m 2021-09-27T18:48:31.86
IV.GUMA.HHE. ML:1.6 0.0001715 0.28 AML other m 2021-09-27T18:48:33.91
IV.CESI.HHN. ML:1.4 6.275E-5 1.78 AML other m 2021-09-27T18:48:35.01
IV.CESI.HHE. ML:1.3 6.22E-5 1.26 AML other m 2021-09-27T18:48:35.85
IV.GAVE.EHN. ML:1.6 6.605E-5 1.74 AML other m 2021-09-27T18:48:38.90
IV.GAVE.EHE. ML:1.6 6.38E-5 0.78 AML other m 2021-09-27T18:48:39.65
IV.NRCA.HHN. ML:1.3 4.455E-5 0.82 AML other m 2021-09-27T18:48:39.86
IV.NRCA.HHE. ML:1.2 3.955E-5 1.26 AML other m 2021-09-27T18:48:40.21
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