Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.7 on date 21-01-2021 and time 23:13:47 (UTC) in region 2 km S Pacentro (AQ)

A magnitude ML 1.7 earthquake occured in region: 2 km S Pacentro (AQ), on

  • 21-01-2021 23:13:47 (UTC)
  • 22-01-2021 00:13:47 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.0370, 13.9970 at 10 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

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.

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Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Pacentro AQ 2 1174 1174
Cansano AQ 4 274 1448
Campo di Giove AQ 5 803 2251
Sulmona AQ 6 24557 26808
Pettorano sul Gizio AQ 8 1376 28184
Introdacqua AQ 9 2126 30310
Sant'Eufemia a Maiella PE 10 278 30588
Rocca Pia AQ 11 178 30766
Bugnara AQ 12 1125 31891
Pratola Peligna AQ 12 7577 39468
Roccacasale AQ 13 693 40161
Palena CH 13 1392 41553
Caramanico Terme PE 14 1929 43482
Prezza AQ 14 945 44427
Lettopalena CH 14 358 44785
Taranta Peligna CH 14 376 45161
Lama dei Peligni CH 16 1271 46432
Corfinio AQ 16 1051 47483
Salle PE 16 308 47791
Anversa degli Abruzzi AQ 17 341 48132
Pescocostanzo AQ 17 1128 49260
Raiano AQ 17 2815 52075
Villalago AQ 17 568 52643
Colledimacine CH 17 202 52845
Scanno AQ 18 1847 54692
Vittorito AQ 18 873 55565
Fara San Martino CH 18 1414 56979
Cocullo AQ 18 230 57209
Goriano Sicoli AQ 19 569 57778
Civitella Messer Raimondo CH 19 848 58626
Rivisondoli AQ 19 700 59326
Roccamorice PE 20 939 60265

Municipalities with at least 50000 inhabitants

An earthquake occurred to
38 Km SW of Chieti (51815 inhabitants)
51 Km SW of Pescara (121014 inhabitants)
55 Km S of Montesilvano (53738 inhabitants)
61 Km SE of L'Aquila (69753 inhabitants)
73 Km SE of Teramo (54892 inhabitants)
99 Km E of Tivoli (56533 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Bulletin
Rev1000 		ML 1.7 2021-01-21
23:13:47		 42.0368 13.9972 10 2021-07-12
16:55:05		 Bollettino Sismico Italiano INGV 88756671
Reviewed
Rev100 		ML 1.7 2021-01-21
23:13:47		 42.0322 13.9982 10 2021-01-21
23:21:58		 Sala Sismica INGV-Roma 86442091
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-01-21 23:13:47 ± 0.08
Latitude 42.0368 ± 0.0045
Longitude 13.9972 ± 0.0073
Depth (km) 10 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 88756671

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 607
Semi-minor axis of confidence ellipse (meter) 466
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 46
Circular confidence region, given by single value of horizontal uncertainty (meter) 610.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 104
Number of associated phases, regardless of their use for origin computation 33
Number of defining phases 33
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.29
Epicentral distance of station closest to the epicenter (degree) 0.07015
Epicentral distance of station farthest from the epicenter (degree) 0.64571
Number of stations at which the event was observed 17
Number of stations from which data was used for origin computation 17
Magnitudes information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.2
Num. used stations 18
Type of magnitude ML
Reference to an origin 86442091
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-01-21 23:21:58

ML:1.7

Field Value
Value 1.7
Uncertainty 0.2
Num. used stations 18
Type of magnitude ML
Reference to an origin 88756671
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-04-15 17:21:03
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MCI.EHE. 2021-01-21T23:14:07.75 0.6 undecidable manual S 194 62.3931 50 0.75 37
IV.LRP.EHZ. 2021-01-21T23:14:04.97 0.3 undecidable manual S 218 55.0005 50 -0.04 69
IV.CERA.HNN. 2021-01-21T23:14:03.90 0.6 undecidable manual S 178 48.7179 50 0.55 41
IV.MIDA.HHZ. 2021-01-21T23:14:03.60 0.6 undecidable manual S 154 48.7179 50 0.27 45
IV.VCEL.EHE. 2021-01-21T23:14:02.04 0.6 undecidable manual S 342 41.7249 50 0.57 42
IV.FAGN.HHZ. 2021-01-21T23:14:01.89 0.6 undecidable manual S 307 42.4242 50 0.23 45
IV.RNI2.HHZ. 2021-01-21T23:14:01.95 0.3 undecidable manual S 161 39.1275 50 1.16 48
IV.POFI.HHZ. 2021-01-21T23:14:01.31 0.6 undecidable manual S 214 42.5241 50 -0.38 44
IV.VAGA.HHZ. 2021-01-21T23:14:00.79 0.6 undecidable manual P 164 71.6727 50 0.53 40
IV.VVLD.HHZ. 2021-01-21T23:13:59.65 0.6 undecidable manual S 239 36.0417 50 -0.3 45
IV.MCI.EHE. 2021-01-21T23:13:58.50 0.6 undecidable manual P 194 62.3931 50 -0.33 43
IT.OPI.HGN. 2021-01-21T23:13:58.43 0.3 undecidable manual S 206 32.0457 50 -0.46 66
IV.T0110.HHZ. 2021-01-21T23:13:57.75 0.6 undecidable manual S 320 28.0497 50 -0.07 48
IV.LRP.EHZ. 2021-01-21T23:13:57.30 0.3 undecidable manual P 218 55.0005 50 -0.38 64
IV.CERA.HNN. 2021-01-21T23:13:56.52 0.3 undecidable manual P 178 48.7179 50 -0.2 68
IV.MIDA.HHZ. 2021-01-21T23:13:56.59 0.3 undecidable manual P 154 48.7179 50 -0.12 69
IV.POFI.HHZ. 2021-01-21T23:13:55.49 0.3 undecidable manual P 214 42.5241 50 -0.28 67
IV.RNI2.HHZ. 2021-01-21T23:13:55.58 0.3 undecidable manual P 161 39.1275 50 0.33 67
IV.VCEL.EHE. 2021-01-21T23:13:55.72 0.6 undecidable manual P 342 41.7249 50 0.08 47
IV.FAGN.HHZ. 2021-01-21T23:13:55.49 0.3 undecidable manual P 307 42.4242 50 -0.26 68
IV.VVLD.HHZ. 2021-01-21T23:13:54.41 0.3 undecidable manual P 239 36.0417 50 -0.35 67
IV.T0110.HHZ. 2021-01-21T23:13:53.38 0.1 undecidable manual P 320 28.0497 50 -0.15 95
IV.LPEL.HHZ. 2021-01-21T23:13:53.52 0.3 undecidable manual S 86 15.3735 123 -0.54 66
IT.OPI.HGN. 2021-01-21T23:13:53.86 0.3 undecidable manual P 206 32.0457 50 -0.29 68
IT.SULA.HNN. 2021-01-21T23:13:52.40 0.6 undecidable manual S 301 7.7811 143 0.29 48
IT.SULP.HGZ. 2021-01-21T23:13:52.31 0.6 undecidable manual S 313 7.881 142 0.19 49
IV.INTR.HNE. 2021-01-21T23:13:52.16 0.6 undecidable manual S 250 8.0808 141 -0.03 50
IT.SULC.HNZ. 2021-01-21T23:13:52.21 0.6 undecidable manual S 295 8.0808 142 0.05 50
IV.LPEL.HHZ. 2021-01-21T23:13:51.11 0.1 undecidable manual P 86 15.3735 123 -0.25 95
IT.SULA.HNN. 2021-01-21T23:13:50.42 0.1 undecidable manual P 301 7.7811 143 0.19 97
IT.SULP.HGZ. 2021-01-21T23:13:50.29 0.1 undecidable manual P 313 7.881 142 0.05 100
IV.INTR.HNE. 2021-01-21T23:13:50.43 0.1 undecidable manual P 250 8.0808 141 0.15 98
IT.SULC.HNZ. 2021-01-21T23:13:50.45 0.3 undecidable manual P 295 8.0808 142 0.19 73
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.LPEL.HNE. ML:1.7 0.000499 1.44 AML other m 2021-01-21T23:13:53.92
IV.LPEL.HHE. ML:1.8 0.0005740000000000001 0.76 AML other m 2021-01-21T23:13:53.92
IV.LPEL.HNN. ML:1.8 0.00055 0.36 AML other m 2021-01-21T23:13:53.93
IV.LPEL.HHN. ML:1.8 0.0005755000000000001 0.36 AML other m 2021-01-21T23:13:53.76
IV.VVLD.HHE. ML:1.4 0.00009504999999999999 1.52 AML other m 2021-01-21T23:14:00.00
IV.T0110.HHN. ML:1.6 0.00022000000000000003 0.38 AML other m 2021-01-21T23:14:01.38
IV.T0110.HHE. ML:1.6 0.00020400000000000003 0.26 AML other m 2021-01-21T23:14:02.39
IV.VVLD.HHN. ML:1.3 0.0000805 1.26 AML other m 2021-01-21T23:14:03.13
IV.RNI2.HHE. ML:1.8 0.00023449999999999998 0.42 AML other m 2021-01-21T23:14:03.24
IV.RNI2.HNN. ML:1.8 0.0002055 0.58 AML other m 2021-01-21T23:14:03.38
IV.RNI2.HHN. ML:1.8 0.00022549999999999998 0.58 AML other m 2021-01-21T23:14:03.38
IV.POFI.HHE. ML:1.3 0.00007139999999999999 0.6 AML other m 2021-01-21T23:14:04.37
IV.MIDA.HHN. ML:1.9 0.000216 0.4 AML other m 2021-01-21T23:14:04.37
IV.RNI2.HNE. ML:1.8 0.00021799999999999999 0.4 AML other m 2021-01-21T23:14:04.24
IV.MIDA.HHE. ML:1.8 0.00016949999999999997 0.3 AML other m 2021-01-21T23:14:04.33
IV.FAGN.HHE. ML:1.5 0.00010694999999999998 0.5 AML other m 2021-01-21T23:14:05.29
IV.POFI.HHN. ML:1.3 0.000057749999999999994 0.88 AML other m 2021-01-21T23:14:05.51
IV.FAGN.HHN. ML:1.6 0.00011949999999999999 0.42 AML other m 2021-01-21T23:14:08.67
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